Publications:

Synopsis: 120 peer-reviewed journal publications, including 43 in letter journals.
Approximately 75 non-refereed publications in conference proceedings and annual reports of synchrotron radiation sources. 4 conference proceedings (as editor) and book chapters.

A. Publications in Refereed Journals

A1. “Synthesis and Characterization of Conductive Polyimide/Carbon Composites with Surface Deposits of Pt”,
J.M. Kinyanjui, D.W. Hatchett, G. Castruita, A.D. Ranasinghe, L. Weinhardt, T. Hofmann, and C. Heske,
Synth. Metals, in print.

A2. “Soft X-Ray Emission Spectroscopy Studies of the Electronic Structure of Silicon Supersaturated with Sulfur”,
J.T. Sullivan, R.G. Wilks, M.T. Winkler, L. Weinhardt, D. Recht, A.J. Said, B.K. Newman, Y. Zhang, M. Blum, S. Krause, W. Yang, C. Heske, M.J. Aziz, M. Bär, and T. Buonassisi,
Appl. Phys. Lett., in print.

A3. “Electron-hole correlation effects in core-level spectroscopy probed by the resonant inelastic soft x-ray scattering map of C₆₀”,
L. Weinhardt, O. Fuchs, D. Batchelor, M. Bär, M. Blum, J.D. Denlinger, W. Yang, A. Schöll, F. Reinert, E. Umbach, and C. Heske,
J. Chem. Phys. 135, 104705 (2011). (5 pages)

A4. “Native oxidation and Cu-poor surface structure of thin film Cu₂ZnSnS₄ solar cell absorbers”,
M. Bär, B.-A. Schubert, B. Marsen, S. Krause, S. Pookpanratana, T. Unold, L. Weinhardt, C. Heske, and H.-W. Schock,
Appl. Phys. Lett. 99, 112103 (2011). (3 pages)

A5. “Nuclear dynamics in the core-excited state of aqueous ammonia probed by resonant inelastic soft x-ray scattering”,
L. Weinhardt, M. Weigand, O. Fuchs, M. Bär, M. Blum, J.D. Denlinger, W. Yang, E. Umbach, and C. Heske,
Phys. Rev. B 84, 104202 (2011). (5 pages)

A6. “Highly Photoactive a-Fe₂O₃ Films for Photoelectrochemical Water Splitting”,
G. Wang, Y. Ling, D.A. Wheeler, K. George, X. Yang, K. Horsley, C. Heske, J.Z. Zhang, and Y. Li,
Nano Letters 11, 3503 – 3509 (2011).

A7. “Electronic structure of Cu₂ZnSnS₄ probed by soft x-ray emission and absorption spectroscopy”,
M. Bär, B.-A. Schubert, B. Marsen, S. Schorr, R.G. Wilks, L. Weinhardt, S. Pookpanratana, M. Blum, S. Krause, Y. Zhang, W. Yang, T. Unold, C. Heske, and H.-W. Schock,
Phys. Rev. B 84, 03508 (2011). (6 pages)

A8. “The Electrochemical Reduction of PdCl₄^2- and PdCl₆^2- in Polyaniline: Influence of Pd Deposit Morphology on Methanol Oxidation in Alkaline Solution”,
D.W. Hatchett, N.M. Millick, J.M. Kinyanjui, S. Pookpanratana, M. Bär, T. Hofmann, A. Luinetti, and C. Heske,
Electrochimica Acta 56, 6060 – 6070 (2011).

A9. “X-ray photoelectron spectroscopy study of the chemical interaction at the Pd/SiC interface”,
Y. Zhang, G. Gajjala, T. Hofmann, L. Weinhardt, M. Bär, C. Heske, M. Seelmann-Eggebert, and D. Meisen,
J. Appl. Phys. 108, 093702 (2010).

A10. “Effects of post-deposition treatments on surfaces of CdTe/CdS solar cells”,
S. Pookpanratana, X. Liu, N. R. Paudel, L. Weinhardt, M. Bär, Y. Zhang, F. Khan, M. Blum, W. Yang, A. Compaan, and C. Heske,
Appl. Phys. Lett. 97, 172109 (2010).

A11. “CdS/Cu(In,Ga)Se₂ interface formation in high-efficiency thin film solar cells”,
S. Pookpanratana, I. Repins, M. Bär, L. Weinhardt, Y. Zhang, R. Felix, M. Blum, W. Yang, and C. Heske,
Appl. Phys. Lett. 97, 074101 (2010).

A12. “Organogels from Functionalized T-Shaped π-Conjugated Bisphenazines”,
K. Jang, A.D. Ranasinghe, C. Heske, and D.-C. Lee,
Langmuir 26, 13630-13636 (2010).

A13. “Impact of solid-phase crystallization of amorphous silicon on the chemical structure of the buried Si/ZnO thin film solar cell interface”,
M. Bär, M. Wimmer, R.G. Wilks, M. Roczen, D. Gerlach, F. Ruske, K. Lips, B. Rech, L. Weinhardt, M. Blum, S. Pookpanratana, S. Krause, Y. Zhang, C. Heske, W. Yang, and J.D. Denlinger,
Appl. Phys. Lett. 97, 072105 (2010).

A14. “Chemical structure of vanadium-based contact formation on n-AlN”,
S. Pookpanratana, R. France, M. Blum, A. Bell, M. Bär, L. Weinhardt, Y. Zhang, T. Hofmann, O. Fuchs, W. Yang, J. D. Denlinger, S. Mulcahy, T. D. Moustakas, and C. Heske,
J. Appl. Phys. 108, 024906 (2010).

A15. “Non-destructive depth-resolved spectroscopic investigation of the heavily intermixed In₂S₃/Cu(In,Ga)Se₂ interface”,
M. Bär, N. Barreau, F. Couzinié-Devy, S. Pookpanratana, J. Klaer, M. Blum, Y. Zhang, W. Yang, J.D. Denlinger, H.-W. Schock, L. Weinhardt, J. Kessler, and C. Heske,
Appl. Phys. Lett. 96, 184101 (2010).

A16. “Sulfur gradient-driven Se diffusion at the CdS/CuIn(S,Se)₂ solar cell interface”,
L. Weinhardt, M. Bär, S. Pookpanratana, M. Morkel, T.P. Niesen, F. Karg, K. Ramanathan, M.A. Contreras, R. Noufi, E. Umbach, and C. Heske,
Appl. Phys. Lett. 96, 182102 (2010).

A17. “Oxidation of Titanium-decorated Single-Walled Carbon Nanotubes and subsequent reduction by Lithium”,
I. Tran, R. Felix, M. Bär, L. Weinhardt, Y. Zhang, and C. Heske,
J. Am. Chem. Soc. 132, 5789-5792 (2010).

A18. “Resonant x-ray emission spectroscopy of liquid water: novel instrumentation, high resolution, and the map approach”,
L. Weinhardt, O. Fuchs, M. Blum, M. Bär, M. Weigand, J.D. Denlinger, Y. Zubavichus, M. Zharnikov, M. Grunze, C. Heske, and E. Umbach,
J. El. Spectrosc. Rel. Phenom. 177, 206-211 (2010).

A19. “Mo incorporation in WO₃ thin film Photoanodes – Tailoring the electronic structure for photoelectrochemical hydrogen production”,
M. Bär, L. Weinhardt, B. Cole, B. Marsen, N. Gaillard, E.L. Miller, and C. Heske,
Appl. Phys. Lett. 96, 032107 (2010).

A20. “REVIEW: Accelerating materials development for photoelectrochemical hydrogen production: Standards for methods, definitions, and reporting protocols”,
Z. Chen, T. F. Jaramillo, T. G. Deutsch, A. Kleiman-Shwarsctein, A. Forman, N. Gaillard, R. Garland, K. Takanabe, C. Heske, M. Sunkara, E. W. McFarland, K. Domen, E. L. Miller, J. A. Turner, and H. N. Dinh,
J. Mater. Res. 25, 3-16 (2010).

A21. “Origin of improved current collection in WO₃/WO₃:Mo bilayer photoelectrodes”,
N. Gaillard, B. Cole, B. Marsen, J. Kaneshiro, E.L. Miller, L. Weinhardt, M. Bär, C. Heske, K. -S. Ahn, Y. Yan, and M. M. Al-Jassim,
J. Mater. Res. 25, 45-51 (2010).

A22. “Solid And Liquid Spectroscopic Analysis (SALSA) – a soft x-ray spectroscopy synchrotron endstation with a novel flow-through liquid cell”,
M. Blum, L. Weinhardt, O. Fuchs, M. Bär, Y. Zhang, M. Weigand, S. Krause, S. Pookpanratana, T. Hofmann, W. Yang, J. D. Denlinger, E. Umbach, and C. Heske,
Rev. Sci. Instrum. 80, 123102 (2009).

A23. “Three-dimensional buffer/absorber interface structure in chalcopyrite solar cells”,
M. Rusu, M. Bär, S. Lehmann, S. Sadewasser, L. Weinhardt, C.A. Kaufmann, J. Röhrich, W. Bohne, I. Lauermann, C. Heske, and M.Ch. Lux-Steiner,
Appl. Phys. Lett. 95, 173502 (2009). (3 pages)

A24. “Morphology of perylene thin films on SiO_x/Si(100) and SiO₂/Si(100): a spectroscopic and microscopic study of the influence of the preparation parameters”,
M. B. Casu, X. Yu, S. Schmitt, C. Heske, and E. Umbach,
Chem. Phys. Lett. 479, 76-80 (2009).

A25. “Chemical and electronic surface structure of 20%-efficient Cu(In,Ga)Se₂ thin film solar cell absorbers”,
M. Bär, I. Repins, M.A. Contreras, L. Weinhardt, R. Noufi, and C. Heske,
Appl. Phys. Lett. 95, 052106 (2009). (3 pages)

A26. “Nucleation in Organic Thin Film Growth: Perylene on Al₂O₃/Ni₃Al(111)”,
B. Casu, A. Schoell, K. Bauchspiess, D. Hübner, Th. Schmidt, C. Heske, and E. Umbach,
J. Phys. Chem. C 113, 10990-10996 (2009).

A27. “High-resolution, high-transmission soft x-ray spectrometer for the study of biological samples”,
O. Fuchs, L. Weinhardt, M. Blum, M. Weigand, E. Umbach, M. Bär, C. Heske, J. Denlinger, Yi-De Chuang, W. McKinney, Z. Hussain, E. Gullikson, M. Jones, P. Batson, B. Nelles, and R. Follath,
Rev. Sci. Instrum. 80, 063103 (2009). (7 pages)
selected for the Virtual Journal of Biological Physics Research 17(12) (2009).

A28. “Resonant inelastic soft x-ray scattering of CdS: A two-dimensional electronicstructure map approach”,
L. Weinhardt, O. Fuchs, A. Fleszar, M. Bär, M. Blum, M. Weigand, J.D. Denlinger, W. Yang, W. Hanke, E. Umbach, and C. Heske,
Phys. Rev. B 79, 165305 (2009). (5 pages)

A29. “Impact of air-exposure on the chemical and electronic structure of ZnO:Zn₃N₂ thin films”,
M. Bär, K.-S. Ahn, Y. Yan, L. Weinhardt, O. Fuchs, M. Blum, K. George, S. Pookpanratana, W. Yang, J.D. Denlinger, M. Al-Jassim, and C. Heske,
Appl. Phys. Lett. 94, 012110 (2009). (3 pages)

A30. “Influence of the preparation conditions on the morphology of perylene thin films on Si(111) and Si(100)”,
M. B. Casu, X. Yu, S. Schmitt, C. Heske, and E. Umbach,
J. Chem. Phys. 129, 244708 (2008). (6 pages)
selected for the Virtual Journal of Biological Physics Research 17(1) (2009).

A31. “Depth-resolved band gap energies in Cu(In,Ga)(S,Se)₂ thin films“,
M. Bär, L. Weinhardt, S. Pookpanratana, C. Heske, S. Nishiwaki, W. Shafarman, O. Fuchs, M. Blum, W. Yang, and J.D. Denlinger,
Appl. Phys. Lett. 93, 244103 (2008). (3 pages)

A32. "Intermixing and chemical structure at the interface between n-GaN and V-based contacts", S. Pookpanratana, R. France, M. Bär, L. Weinhardt, O. Fuchs, M. Blum, W. Yang, J. D. Denlinger, T. D. Moustakas, and C. Heske,
Appl. Phys. Lett. 93, 172106 (2008). (3 pages)

A33. "Chemical structures of the Cu(In,Ga)Se₂/Mo and Cu(In,Ga)(S,Se)₂/Mo interfaces",
M. Bär, L. Weinhardt, C. Heske, S. Nishiwaki, and W. Shafarman,
Phys. Rev. B 78, 075404 (2008). (8 pages)

A34. "Electronic level alignment at the deeply buried absorber/back contact interface in chalcopyrite-based thin film solar cells",
M. Bär, L. Weinhardt, S. Pookpanratana, C. Heske, S. Nishiwaki, and W. Shafarman,
Appl. Phys. Lett. 93, 042110 (2008). (3 pages)

A35. Reply to Comment on "Isotope and temperature effects in liquid water probed by x-ray absorption and resonant x-ray emission spectroscopy",
O. Fuchs, M. Zharnikov, L. Weinhardt, M. Blum, M. Weigand, Y. Zubavichus, M. Bär, F. Maier, W. Yang, J. D. Denlinger, C. Heske, M. Grunze, and E. Umbach,
Phys. Rev. Lett. 100, 249802 (2008). (1 page)

A36. "A multi-technique investigation of TiO₂ films prepared by magnetron sputtering",
M. B. Casu, W. Braun, K. R. Bauchspieß, S. Kera, B. Megner, C. Heske, R. Thull, and E. Umbach,
Surface Science 602, 1599-1606 (2008).

A37. "Electronic surface level positions of WO₃ thin films for photoelectrochemical hydrogen production",
L. Weinhardt, M. Blum, M. Bär, C. Heske, B. Cole, B. Marsen, and E.L. Miller,
J. Phys. Chem. C 112, 3078-3082 (2008).

A38. "A liquid flow cell to study the electronic structure of liquids with soft x-rays”,
Oliver Fuchs, Florian Maier, Lothar Weinhardt, Markus Weigand, Monika Blum, Michael Zharnikov, Jonathan Denlinger, Michael Grunze, Clemens Heske, and Eberhard Umbach,
Nuclear Instruments and Methods A 585, 172-177 (2008).

A39. "Isotope and temperature effects in liquid water probed by x-ray absorption and resonant x-ray emission spectroscopy",
O. Fuchs, M. Zharnikov, L. Weinhardt, M. Blum, M. Weigand, Y. Zubavichus, M. Bär, F. Maier, W. Yang, J. D. Denlinger, C. Heske, M. Grunze, and E. Umbach,
Phys. Rev. Lett. 100, 027801 (2008). (4 pages)

A40. "Angle-resolved photoemission on ZnSe(001): determination of conduction band quasiparticle shifts“,
A. Fleszar, W. Hanke, W. Weigand, C. Kumpf, C. Heske, E. Umbach, L. Plucinski, and R. L. Johnson,
Phys. Stat. Sol. C 4, 3204-3209 (2007).

A41. "Resonant inelastic soft x-ray scattering, x-ray absorption spectroscopy, and density functional theory calculations of the electronic bulk band structure of CdS”,
L. Weinhardt, O. Fuchs, E. Umbach, C. Heske, A. Fleszar, and W. Hanke,
Phys. Rev. B 75, 165207 (2007). (8 pages)

A42. "Chemical properties of the Cu(In,Ga)Se₂/Mo/glass interfaces in thin film solar cells",
L. Weinhardt, M. Blum, M. Bär, C. Heske, O. Fuchs, E. Umbach, J.D. Denlinger, K. Ramanathan, and R. Noufi,
Thin Solid Films 515, 6119-6122 (2007).

A43. "The Electronic Structure of the [Zn(S,O)/ZnS]/CuInS2 Heterointerface – Impact of Post-Annealing",
M. Bär, A. Ennaoui, J. Klaer, R. Sáez-Araoz, T. Kropp, H.-W. Schock, Ch.-H. Fischer, M.C. Lux-Steiner, L. Weinhardt, and C. Heske,
Chem. Phys. Lett. 433, 71-74 (2006).

A44. "Chemical insights into the Cd²⁺/NH₃-treatment – an approach to explain the formation of Cd-compounds on Cu(In,Ga)(S,Se)₂ absorbers",
M. Bär, L. Weinhardt, C. Heske, H.-J. Muffler, E. Umbach, M.Ch. Lux-Steiner, Th. P. Niesen, F. Karg, and Ch.-H. Fischer,
Solar Energy Materials and Solar Cells 90, 3151-3157 (2006).

A45. "Oxygen K-edge x-ray absorption fine structure studies of vacuum-deposited ice films",
Y. Zubavichus, M. Zharnikov, Y.-J. Yang, O. Fuchs, E. Umbach, C. Heske, and M. Grunze,
Langmuir 22, 7241-7247 (2006).

A46. "Surface modifications of Cu(In,Ga)S₂ thin film solar cell absorbers by KCN and H₂O₂/H₂SO₄ treatments",
L. Weinhardt, O. Fuchs, D. Groß, E. Umbach, C. Heske, N.G. Dhere, A.A. Kadam, and S.S. Kulkarni,
J. Appl. Phys. 100, 024907 (2006).

A47. "Resonant inelastic soft x-ray scattering of Be chalcogenides",
D. Eich, O. Fuchs, U. Groh, L. Weinhardt, R. Fink, E. Umbach, C. Heske, A. Fleszar, W. Hanke, E.K.U. Gross, C. Bostedt, L.J. Terminello, M. Keim, G. Reuscher, H. Lugauer, and A. Waag,
Phys. Rev. B 73, 115212 (2006).

A48. "Spectroscopic investigation of the deeply buried Cu(In,Ga)(S,Se)₂/Mo interface in thin film solar cells",
L. Weinhardt, O. Fuchs, A. Peter, E. Umbach, C. Heske, J. Reichardt, M. Bär, I. Lauermann, I. Kötschau, A. Grimm, A. Sokoll, M.Ch. Lux-Steiner, Ch. Jung, W. Gudat, T. P. Niesen, and F. Karg,
J. Chem. Phys. 124, 074705 (2006).

A49. "Spectroscopic analysis of CIGS2/CdS thin film solar cell heterojunctions on stainless steel foil",
N.G. Dhere, A.A. Kadam, A.H. Jahagirdar, S.S. Kulkarni, L. Weinhardt, D. Groß, C. Heske, and E. Umbach,
Journal of Physics and Chemistry of Solids 66, 1872 (2005).

A50. "Structure determination of nanoparticles: Direct modelling of synchrotron radiation diffraction data", C. Kumpf, R. Neder, F. Niederdraenk, P. Luczak, A. Stahl, M. Scheuermann, S.K. Kulkarni, C. Barglik-Chory, C. Heske, and E. Umbach,
J. Chem. Phys. 123, 224707 (2005).

A51. "Cd²⁺/NH₃-treatment of Cu(In,Ga)(S,Se)₂ thin film solar cell absorbers – a model for the performance-enhancing processes in the partial electrolyte",
M. Bär, L. Weinhardt, C. Heske, H.-J. Muffler, M. Ch. Lux-Steiner, E. Umbach, and Ch.-H. Fischer,
Prog. Photovolt. 13, 571-577 (2005).

A52. "The Zn(O,OH) material system in chalcopyrite thin film solar cells: Position of the valence band maximum vs. composition",
M. Bär, J. Reichardt, A. Grimm, I. Kötschau, I. Lauermann, K. Rahne, S. Sokoll, M.C. Lux-Steiner, Ch.-H. Fischer, L. Weinhardt, E. Umbach, C. Heske, Ch. Jung, T.P. Niesen, and S. Visbeck,
J. Appl. Phys. 98, 053702 (2005).

A53. "Two-fold symmetry in the surface electronic structure of ZnSe(001)-c(2×2): theory and experiment",
L. Plucinski, W. Weigand, C. Kumpf, C. Heske, R. Kosuch, T. Schallenberg, E. Umbach, L.W. Molenkamp, R.L. Johnson,
Surface Science 585, 95 (2005).

A54. "Ultra-fast Dynamics in Water probed by X-ray Emission Spectroscopy",
M. Odelius, H. Ogasawara, D. Nordlund, O. Fuchs, L. Weinhardt, F. Maier, E. Umbach, C. Heske, Y. Zubavichus, M. Grunze, J.D. Denlinger, L.G.M. Pettersson, and A. Nilsson,
Phys. Rev. Lett. 94, 227401 (2005).

A55. "Cd²⁺/NH₃ – Treatment Induced Formation of a CdSe Surface Layer on CuGaSe₂ Thin Film Solar Cell Absorbers",
M. Bär, S. Lehmann, M. Rusu, A. Grimm, I. Kötschau, I. Lauermann, P. Pistor, S. Sokoll, Th. Schedel-Niedrig, M.C. Lux-Steiner, Ch.-H. Fischer, L. Weinhardt, C. Heske, and Ch. Jung,
Appl. Phys. Lett. 86, 222107 (2005).

A56. "Inducing and monitoring photoelectrochemical reactions at surfaces and buried interfaces in Cu(In,Ga)(S,Se)₂ thin film solar cells",
J. Reichardt, M. Bär, A. Grimm, I. Kötschau, I. Lauermann, S. Sokoll, M. C. Lux-Steiner, Ch.-H. Fischer, C. Heske, L. Weinhardt, O. Fuchs, Ch. Jung, W. Gudat, and F. Karg,
Appl. Phys. Lett. 86, 172102 (2005).

A57. "Band alignment at the CdS/Cu(In,Ga)S₂ interface in thin film solar cells",
L. Weinhardt, O. Fuchs, D. Groß, G. Storch, E. Umbach, N.G. Dhere, A.A. Kadam, S.S. Kulkarni, and C. Heske,
Appl. Phys. Lett. 86, 062109 (2005).

A58. "Surface chemistry of ultrathin films of histidine on gold as probed by high-resolution synchrotron photoemission",
Y. Zubavichus, M. Zharnikov, Y. Yang, O. Fuchs, C. Heske, E. Umbach, G. Tzvetkov, F.P. Netzer, and M. Grunze,
J. Phys. Chem. B 109, 884 (2005).

A59. "X-ray Photoelectron Spectroscopy and Near-Edge X-ray Absorption Fine Structure Study of Water Adsorption on Pyridine-Terminated Thiolate Self-Assembled Monolayers",
Y. Zubavichus, M. Zharnikov, Y. Yang, O. Fuchs, E. Umbach, C. Heske, A. Ulman, and M. Grunze,
Langmuir 20, 11022 (2004).

A60. "Bonding and structure of glycine on ordered Al₂O₃ surfaces"
G. Tzvetkov, G. Koller, Y. Zubavichus, O. Fuchs, M. B. Casu, C. Heske, E. Umbach, M. Grunze, M. G. Ramsey, and F. P. Netzer,
Langmuir 20, 10551 (2004).

A61. "Valence band electronic structure of ZnSe(001) thin films: Theory and Experiment",
L. Plucinski, R.L. Johnson, A. Fleszar, W. Hanke, W. Weigand, C. Kumpf, C. Heske, E. Umbach, T. Schallenberg, and L.W. Molenkamp,
Phys. Rev. B 70, 125308 (2004).

A62. "Ethylene on Cu(110) and Ni(110): Electronic structure and bonding derived from x-ray spectroscopy and theory",
H. Öström, A. Föhlisch, M. Nyberg, M. Weinelt, C. Heske, L.G.M. Pettersson, and A. Nilsson,
Surf. Sci. 559, 85 (2004).

A63. "Soft X-ray induced decomposition of phenylalanine and tyrosine: a comparative study",
Y. Zubavichus, M. Zharnikov, A. Shaporenko, O. Fuchs, L. Weinhardt, C. Heske, E. Umbach, J.D. Denlinger, and M. Grunze
J. Phys. Chem. A 108, 4557 (2004).

A64. "Strong quantum-confinement effects in the conduction band of germanium nanocrystals",
C. Bostedt, T. van Buuren, T.M. Willey, N. Franco, L.J. Terminello, C. Heske, and T. Möller,
Appl. Phys. Lett. 84, 4056 (2004).
Selected for the Virtual Journal of Nanoscale Science & Technology 9(19), 2004.

A65. "Band alignment at the i-ZnO/CdS interface in Cu(In,Ga)(S,Se)₂ thin film solar cells",
L. Weinhardt, C. Heske, E. Umbach, T.P. Niesen, S. Visbeck, and F. Karg,
Appl. Phys. Lett. 84, 3175 (2004).

A66. "Local structure of amorphous ice as revealed by O K-edge EXAFS”,
Y. Zubavichus, Y. Yang, M. Zharnikov, M. Grunze, O. Fuchs, T. Schmidt, C. Heske, E. Umbach, G. Tzvetkov, and F. Netzer,
ChemPhysChem 5, 509 (2004).

A67. "Spectroscopic investigation of buried interfaces and liquids with soft x-rays",
C. Heske,
Appl. Phys. A 78, 829 (2004).

A68. "Soft X-ray induced decomposition of amino acids: a time-resolved XPS, mass-spectrometry, and NEXAFS study”,
Y. Zubavichus, M. Grunze, O. Fuchs, L. Weinhardt, C. Heske, E. Umbach, and J. D. Denlinger,
Radiat. Res. 161, 346 (2004).

A69. "The valence electronic structure of zinc oxide powders as determined by X-ray emission spectroscopy: variation of electronic structure with particle size",
T. Strunskus, O. Fuchs, L. Weinhardt, C. Heske, M. Guraya, M. Muhler, V. Staemmler, and Ch. Wöll,
J. Electron Spectrosc. Rel. Phenom. 134, 183 (2004).

A70. "Synthesis, structure, and spectroscopic characterization of water-soluble CdS nanoparticles",
Ch. Barglik-Chory, D. Buchold, M. Schmitt, W. Kiefer, C. Heske, C. Kumpf, O. Fuchs, L. Weinhardt, A. Stahl, E. Umbach, M. Lentze, J. Geurts, and G. Müller,
Chem. Phys. Lett. 379, 443 (2003).

A71. "Analysis of zinc compound buffer layers in Cu(In,Ga)(S,Se)₂ thin film solar cells by synchrotron-based soft X-ray spectroscopy"
I. Lauermann, M. Bär, A. Ennaoui, U. Fiedeler, C.-H. Fischer, A. Grimm, I. M. Kötschau, M. C. Lux-Steiner, J. Reichardt, B. R. Sankapal, S. Siebentritt, S. Sokoll, L. Weinhardt, O. Fuchs, C. Heske, C. Jung, W. Gudat, F. Karg, and T. P. Niesen,
Mat. Res. Soc. Symp. Proc. Vol. 763, ISBN 1-55899-700-8, p. 610-613 (2003).

A72. "Growth of H₂O layers on an ultra-thin Al₂O₃ film: from monomeric species to ice",
G. Tzvetkov, Y. Zubavichus, G. Koller, Th. Schmidt, C. Heske, E. Umbach, M. Grunze, M. G. Ramsey, and F. P. Netzer,
Surf. Science 543, 131 (2003).

A73. "Surface and bulk properties of CuGaSe₂ thin films“,
A. Meeder, L. Weinhardt, R. Stresing, D. Fuertes Marrón, R. Würz, S.M. Babu, T. Schedel-Niedrig, M.Ch. Lux-Steiner, C. Heske, and E. Umbach,
J. of Phys. and Chem. of Solids 64, 1553 (2003).

A74. "Monitoring chemical reactions on surfaces in liquids: water on CuIn(S,Se)₂ thin film solar cell absorbers",
C. Heske, U. Groh, O. Fuchs, L. Weinhardt, E. Umbach, Th. Schedel-Niedrig, Ch.-H. Fischer, M.Ch. Lux-Steiner, S. Zweigart, F. Karg, J.D. Denlinger, B. Rude, C. Andrus, and F. Powell,
J. Chem. Phys. (Comm.) 119, 10467 (2003).

A75. "Experimental and theoretical electronic structure determination for PtSi",
N. Franco, J.E. Klepeis, C. Bostedt, T. van Buuren, C. Heske, O. Pankratov, T.A. Callcott, D.L. Ederer, and L.J. Terminello,
Phys. Rev. B 68, 045116 (2003).

A76. "Studying the local chemical environment of sulfur atoms at buried interfaces in CdS/ZnSe superlattices",
C. Heske, U. Groh, O. Fuchs, L. Weinhardt, E. Umbach, M. Grün, S. Petillon, A. Dinger, C. Klingshirn, W. Szuszkiewicz, and A. Fleszar,
Appl. Phys. Lett. 83, 2360 (2003).

A77. "Formation of the ZnSe/(Te/)GaAs(100) Heterojunction",
Th. Gleim, C. Heske, E. Umbach, C. Schumacher, S. Gundel, W. Faschinger, A. Fleszar, Ch. Ammon, M. Probst, and H.-P. Steinrück,
Surf. Science 531, 77 (2003).

A78. "The influence of As-passivation on the electronic level alignment at BeTe/Si(111)-interfaces“,
Th. Gleim, L. Weinhardt, Th. Schmidt, R. Fink, C. Heske, E. Umbach, L. Hansen, G. Landwehr, A. Waag, A. Fleszar, B. Richter, Ch. Ammon, M. Probst, and H.-P. Steinrück,
Phys. Rev. B 67, 205315 (2003).

A79. "Impact of Cd²⁺-treatment on the band alignment at the ILGAR-ZnO/CuIn(S,Se)₂ heterojunction”,
L. Weinhardt, M. Bär, H.-J. Muffler, Ch.-H. Fischer, M.C. Lux-Steiner, T.P. Niesen, F. Karg, Th. Gleim, C. Heske, and E. Umbach,
Thin Solid Films 431-432, 272 (2003).

A80. "Enhancement of photoluminescence in manganese doped ZnS nanoparticles due to a silica shell”,
A.S. Ethiraj, N. Hebalkar, S.K. Kulkarni, R. Pasricha, J. Urban, C. Dem, M. Schmitt, W. Kiefer, L. Weinhardt, S. Joshi, R. Fink, C. Heske, C. Kumpf, and E. Umbach,
J. Chem. Phys. 118, 8945 (2003).
Selected for the Virtual Journal of Nanoscale Science & Technology 7(19), 2003.

A81. "Temperature-dependent morphology and structure of ordered 3,4,9,10-perylene-tetracarboxylic-dianhydride (PTCDA) thin films on Ag(111)",
L. Chkoda, M. Schneider, V. Shklover, L. Kilian, C. Heske, E. Umbach, and M. Sokolowski,
Chem. Phys. Lett. 371, 548 (2003).

A82. "CdS- and Cd(OH)₂-formation during Cd-treatments of Cu(In,Ga)(S,Se)₂ thin film solar cell absorbers",
L. Weinhardt, Th. Gleim, O. Fuchs, C. Heske, E. Umbach, M. Bär, H.-J. Muffler, Ch.-H. Fischer, M.C. Lux-Steiner, Y. Zubavichus, T.P. Niesen, and F. Karg,
Appl. Phys. Lett. 82, 571 (2003).

A83. "Damp-heat induced sulfate formation in Cu(In,Ga)(S,Se)₂–based thin film solar cells”,
C. Heske, U. Groh, L. Weinhardt, O. Fuchs, B. Holder, E. Umbach, C. Bostedt, L.J. Terminello, S. Zweigart, T.P. Niesen, and F. Karg,
Appl. Phys. Lett. 81, 4550 (2002).

A84. "Energy level alignment at zincblende Cd(Mn)Se/ZnTe/InAs(100) interfaces“,
Th. Gleim, L. Weinhardt, Th. Schmidt, R. Fink, C. Heske, E. Umbach, P. Grabs, G. Schmidt, L.W. Molenkamp, B. Richter, A. Fleszar, and H.-P. Steinrück,
Appl. Phys. Lett. 81, 3813 (2002).

A85. "Spectroscopic probing of local hydrogen bonding structures in liquid water",
S. Myneni, Y. Luo, L.A. Näslund, M. Cavalleri, L. Ojamäe, H. Ogasawara, A. Pelmenschikov, Ph. Wernet, P. Väterlein, C. Heske, Z. Hussain, L.G.M. Pettersson, and A. Nilsson,
J. Phys. Condensed Matter 14, L213 (2002).

A86. "Flat conduction band alignment at the CdS/CuInSe₂ thin film solar cell heterojunction",
M. Morkel, L. Weinhardt, B. Lohmüller, C. Heske, E. Umbach, W. Riedl, S. Zweigart, and F. Karg,
Appl. Phys. Lett. 79 , 4482 (2001).

A87. "X-ray Emission Spectroscopy of Cu(In,Ga)(S,Se)₂-based thin film solar cells: electronic structure, surface oxidation, and buried interfaces",
C. Heske, U. Groh, O. Fuchs, E. Umbach, N. Franco, C. Bostedt, L.J. Terminello, R.C.C. Perera, K.H. Hallmeier, A. Preobrajenski, R. Szargan, S. Zweigart, W. Riedl, and F. Karg,
phys.stat.sol. (a) 187, 13 (2001).

A88. "Interchannel coupling in the photoionization of the M shell of Kr well above threshold: Experiment and theory",
H.S. Chakraborty, D.L. Hansen, O. Hemmers, P.C. Deshmukh, P. Focke, I.A. Sellin, C. Heske, D.W. Lindle, and S.T. Manson,
Phys. Rev. A 63, 042708 (2001).

A89. "Reduction of the ZnSe/GaAs(100) Valence Band Offset by a Te Interlayer",
Th. Gleim, C. Heske, E. Umbach, C. Schumacher, W. Faschinger, Ch. Ammon, M. Probst, and H.-P. Steinrück,
Appl. Phys. Lett. 78, 1867 (2001).

A90. "Valence band study of PtSi by synchrotron radiation photoelectron spectroscopy",
N. Franco, J.E. Klepeis, C. Bostedt, T. Van Buuren, C. Heske, O. Pankratov, and L.J. Terminello,
J. Electron. Spec. Rel. Phenom. 114-116, 1191 (2001).

A91. "Electronic Structure of the energetic material 1,3,5-triamino-2,4,6-trinitrobenzene",
S. Kakar, A.J. Nelson, R. Treusch, C. Heske, T. van Buuren, I. Jimenez, P. Pagoria, and L.J. Terminello,
Phys. Rev. B 62, 15666 (2000).

A92. "Improved band alignment for hole injection by an interfacial layer: TPD on PTCDA on ITO",
L. Chkoda, C. Heske, M. Sokolowski, and E. Umbach,
Appl. Phys. Lett. 77, 1093 (2000).

A93. "Observation of Multi-Atom Resonant Photoemission via Secondary Processes: Auger Decay and X-ray Fluorescence",
E. Arenholz, A.W. Kay, C.S. Fadley, M.M. Grush, T.A. Callcott, D.L. Ederer, C. Heske, and Z. Hussain,
Phys. Rev. B 61, 7183 (2000).

A94. "X-ray Emission Spectroscopy of NO Adsorbates on Ru(001)",
M. Stichler, C. Keller, C. Heske, M. Staufer, U. Birkenheuer, N. Rösch, W. Wurth, and D. Menzel,
Surf. Science 448, 164 (2000).

A95. "Semiquantitative and non-destructive analysis of impurities at a buried interface: Na and the CdS/Cu(In,Ga)Se₂ heterojunction",
C. Heske, D. Eich, U. Groh, R. Fink, E. Umbach, T. van Buuren, C. Bostedt, N. Franco, L.J. Terminello, M.M. Grush, T.A. Callcott, F.J. Himpsel, D.L. Ederer, R.C.C. Perera, W. Riedl, and F. Karg,
Surf. Interface Anal. 30, 459 (2000).

A96. "Work Function of ITO Substrates and Band-Offsets at the TPD/ITO Interface determined by Photoelectron Spectroscopy",
L. Chkoda, C. Heske, M. Sokolowski, E. Umbach, F. Steuber, J. Staudigel, M. Stössel, and J. Simmerer,
Synthetic Metals 111-112, 315 (2000).

A97. "Lateral Inhomogeneities of Cu(In,Ga)Se₂ Absorber Films",
D. Eich, U. Herber, U. Groh, U. Stahl, C. Heske, M. Marsi, M. Kiskinova, W. Riedl, R. Fink, and E. Umbach,
Thin Solid Films 361-362, 258 (2000).

A98. "Self-Limitation of Na content at the CdS/Cu(In,Ga)Se₂ solar cell heterojunction",
C. Heske, D. Eich, U. Groh, R. Fink, E. Umbach, T. van Buuren, C. Bostedt, N. Franco, L.J. Terminello, M.M. Grush, T.A. Callcott, F.J. Himpsel, D.L. Ederer, R.C.C. Perera, W. Riedl, and F. Karg,
Thin Solid Films 361-362, 360 (2000).

A99. "Franck-Condon Breakdown in Core-Level Photoelectron Spectroscopy of Chemisorbed CO",
A. Föhlisch, J. Hasselström, O. Karis, P. Väterlein, N. Martensson, A. Nilsson, C. Heske, M. Stichler, C. Keller, W. Wurth, and D. Menzel,
Chem. Phys. Lett. 315, 194 (1999).

A100. "Validity of the independent-particle approximation in x-ray photoemission: The exception, not the rule",
D.L. Hansen, O. Hemmers, H. Wang, D.W.Lindle, P.Focke, I.A. Sellin, C. Heske, H.S. Chakraborty, P.C. Deshmukh, and S.T. Manson,
Phys. Rev. A 60, R2641 (1999).

A101. "High Resolution Soft X-Ray Emission Spectra of Crystalline Carbon Nitride Films Deposited by Electron Cyclotron Resonance Sputtering",
Y. Muramatsu, Y. Tani, Y. Aoi, E. Kamijo, T. Kaneyoshi, M. Motoyama, J.J. Delaunay, T. Hayashi, M.M. Grush, T.A. Callcott, D.L. Ederer, C. Heske, J.H., anderwood, and R.C.C. Perera,
Jpn. J. Appl. Phys. 38, 5143 (1999).

A102. "Localization of Na impurities at the buried CdS/Cu(In,Ga)Se₂ heterojunction",
C. Heske, D. Eich, R. Fink, E. Umbach, S. Kakar, T. van Buuren, C. Bostedt, L.J. Terminello, M.M. Grush, T.A. Callcott, F.J. Himpsel, D.L. Ederer, R.C.C. Perera, W. Riedl, and F. Karg,
Appl. Phys. Lett. 75, 2082 (1999).

A103. "X-Ray Photoemission and Photoabsorption of Organic Electroluminescent Materials",
R. Treusch, F.J. Himpsel, S. Kakar, L.J. Terminello, C. Heske, T. van Buuren, V.V. Dinh, H.W. Lee, K. Pakbaz, G. Fox, and I. Jimenez,
J. Appl. Phys. 86, 88 (1999).

A104. "Observation of intermixing at the buried CdS/Cu(In,Ga)Se₂ thin film solar cell heterojunction",
C. Heske, D. Eich, R. Fink, E. Umbach, T. van Buuren, C. Bostedt, L.J. Terminello, S. Kakar, M.M. Grush, T.A. Callcott, F.J. Himpsel, D.L. Ederer, R.C.C. Perera, W. Riedl, and F. Karg,
Appl. Phys. Lett. 74, 1451 (1999).

A105. "Band widening in Graphite",
C. Heske, R. Treusch, F.J. Himpsel, S. Kakar, L.J. Terminello, H.J. Weyer, and E.L. Shirley,
Phys. Rev. B 59, 4680 (1999).

A106. "Bulk and surface characterization of a dewetting thin film polymer blend",
H. Ade, D.A. Winesett, A.P. Smith, S. Anders, T. Stammler, C. Heske, D. Slep, M.H. Rafailovich, J. Sokolov, and J. Stöhr,
Appl. Phys. Lett. 73, 3775 (1998).

A107. "Atom-resolved electronic spectra for Alq3 from theory and experiment",
A. Curioni, W. Andreoni, R. Treusch, F.J. Himpsel, E. Haskal, P. Seidler, C. Heske, S. Kakar, T. van Buuren, and L.J. Terminello,
Appl. Phys. Lett. 72, 1575 (1998).

A108. "Formation of the Zn/CdTe(100) interface: interdiffusion, segregation, and Cd-Zn exchange studied by photoemission",
C. Heske, U. Winkler, D. Eich, R. Fink, E. Umbach, Ch. Jung, and P.R. Bressler,
Phys. Rev. B. 56, 13335 (1997).

A109. "Influence of Na and H₂O on the surface properties of Cu(In,Ga)Se₂ thin films",
C. Heske, G. Richter, Zhonghui Chen, R. Fink, E. Umbach, W. Riedl, and F. Karg,
J. Appl. Phys. 82, 2411 (1997).

A110. "Segregation and interdiffusion effects during the formation of the Mn/CdZnTe(100) interface",
C. Heske, U. Winkler, R. Fink, E. Umbach, Ch. Jung, and P.R. Bressler,
Phys. Rev. B 56, 2085 (1997).

A111. "Surface core-level shifts of the polar semiconductor Cd(Zn)Te(100)",
C. Heske, U. Winkler, G. Held, R. Fink, E. Umbach, Ch. Jung, P.R. Bressler, and Ch. Hellwig,
Phys. Rev. B 56, 2070 (1997).

A112. "Preparation and termination of well-defined CdTe(100) and Cd(Zn)Te(100) surfaces",
C. Heske, U. Winkler, H. Neureiter, M. Sokolowski, R. Fink, E. Umbach, Ch. Jung, and P.R. Bressler,
Appl. Phys. Lett. 70, 1022 (1997).

A113. "NEXAFS Investigations on Highly-Ordered Ultrathin Films of DMe-DCNQI on Single Crystal Surfaces",
M. Bäßler, R. Fink, Chr. Buchberger, D. Gador, C. Heske, J. Müller, P. Väterlein, J.U. von Schütz, and E. Umbach,
J. Phys. IV France 7, C2-531 (1997).

A114. "Na-induced effects on the electronic structure and composition of Cu(In,Ga)Se₂ thin film surfaces",
C. Heske, R. Fink, E. Umbach, W. Riedl, and F. Karg,
Appl. Phys. Lett. 68, 3431 (1996).

A115. "Growth characteristics of sputter-deposited UPt₃ thin films",
M. Huth, S. Reber, C. Heske, P. Schicketanz, J. Hessert, P. Gegenwart, and H. Adrian,
Journal of Physics: Condensed Matter 8, 8777 (1996).

A116. "Surface termination and Ag-segregation at CdTe(100) surfaces studied by photoemission surface core-level shifts",
C. Heske, U. Winkler, Ch. Jung, P.R. Bressler, R. Fink, and E. Umbach,
The Physics of Semiconductors, M. Scheffler and R. Zimmermann (eds.), World Scientific, Singapore, p. 823 (1996).

A117. "Electronic and compositional effects of Na deposition on Cu(In,Ga)Se₂ thin film surfaces",
C. Heske, R. Fink, E. Umbach, W. Riedl, and F. Karg,
Cryst. Res. Technol. 31, 465 (1996).

A118. "Surface Preparation Effects of polycrystalline Cu(In,Ga)Se₂ thin films studied by XPS and UPS",
C. Heske, R. Fink, E. Umbach, W. Riedl, and F. Karg,
Cryst. Res. Technol. 31, 919 (1996).

A119. "NEXAFS-investigations of highly-ordered ultrathin films of DMe-DCNQI on Ag(111)",
M. Bäßler, R. Fink, C. Heske, J. Müller, P. Väterlein, J.U. von Schütz, and E. Umbach,
Thin Solid Films 284/285, 234 (1996).

A120. "UPd₂Al₃ heavy fermion superconducting films",
M. Huth, A. Kaldowski, J. Hessert, C. Heske, and H. Adrian,
Physica B 199/200, 116 (1994).

B. Non-Refereed Publications (Conference Proceedings, Annual Reports, etc.)

B1. “Electronic and Chemical Properties of Non-Vacuum deposited Chalcopyrite Solar Cells”,
K. Horsley, S. Pookpanratana, S. Krause, T. Hofmann, M. Blum, L. Weinhardt, M. Bär, K. George, J. Van Duren, D. Jackrel, and C. Heske,
Proceedings 37^th IEEE PVSC, Seattle, WA, June 20-24, 2011.

B2. “CdCl₂ activation-induced chemical interaction at the CdTe/ZnO_1-XS_X thin-film solar cell interface”,
M. Bär, J. Perrenoud, R.G. Wilks, S. Buecheler, L. Kranz, C. Fella, J. Skarp, M. Blum, W. Yang, L. Weinhardt, C. Heske, and A.N. Tiwari,
Proceedings 37^th IEEE PVSC, Seattle, WA, June 20-24, 2011.

B3. “Identification of Impurity Phases in Cu₂ZnSnS₄ Thin-film Solar Cell Absorber Material by Soft X-ray Absorption Spectroscopy”,
M. Bär, B.-A. Schubert, R.G. Wilks, B. Marsen, Y. Zhang, M. Blum, S. Krause, W. Yang, T. Unold, L. Weinhardt, C. Heske, and H.-W. Schock,
Proceedings MRS Spring 2011, San Francisco, CA, April 25-29, 2011.

B4. Photon Science at the ALS for Sustainable Energy”,
L. Tamura, M. Ahmed, S. Bailey, H. Bluhm, J. Guo, C. Heske, A. Hexemer, Z. Liu, A. MacDowell, M. Marcus, H. Padmore, B. Schoenlein, S. Teat, T. Tyliszczak, W. Yang, P. Adams, R. Falcone, and Z. Hussain,
Synchrotron Radiation News 23:4, 8-15 (2010).

B5. “Chemical structure of buried interfaces in CdTe thin film solar cells”,
S. Pookpanratana, F. Khan, Y. Zhang, C. Heske, L. Weinhardt, M. Bär, X. Liu, N. Paudel, and A. Compaan,
Proceedings 35^th IEEE PVSC, Honolulu, HI, June 21-25, 2010, p. 24-27.

B6. “Cu₂ZnSnS₄ thin-film solar cell absorber composition revealed by energy-dispersive and soft x-ray emission spectroscopy”,
M. Bär, B. Schubert, B. Marsen, T. Unold, R.G. Wilks, H.-W. Schock, S. Pookpanratana, M. Blum, S. Krause, Y. Zhang, C. Heske, W. Yang, and L. Weinhardt,
Proceedings 35^th IEEE PVSC, Honolulu, HI, June 21-25, 2010, p. 646-649.

B7. “ALS Users Meeting and Workshops”,
S. Kanel, R. Schoenlein, J. Corlett, E. Arenholz, P. Fischer, D. Prendergast, Y. Idzerda, A. MacDowell, H. Bluhm, J. Guo, A. Braun, C. Heske, M. Kunz, and N. Tamura,
Synchrotron Radiation News 23:1, 2-14 (2010).

B8. “Spectroscopic Analysis of the Chemical Structure at the CdS/Cu(In,Ga)Se₂ Interface in High-Efficiency Solar Cell Devices”,
S. Pookpanratana, I. Repins, M. Bär, R. Félix, M. Blum, L. Weinhardt, W. Yang, J.D. Denlinger, M.A. Contreras, and C. Heske,
Proceedings 34^th IEEE PVSC, Philadelphia, PA, June 2009, p. 1060-1063.

B9. “Migration and Oxidation of Sulfur at the Back Contact in CdTe Cells”,
X. Liu, N.R. Paudel, A.D. Compaan, K. Sun, L. Weinhardt, M. Bär, S. Pookpanratana, C. Heske, O. Fuchs, W. Yang, and J.D. Denlinger,
Proceedings 34^th IEEE PVSC, Philadelphia, PA, June 2009, p. 2107-2110.

B10. “Bimetallic Palladium-Base Metal Nanoparticle Oxygen Reduction Electrocatalysts”,
X. Wang, N.N. Kariuki, S. Niyogi, M. Smith, D.J. Myers, T. Hofmann, Y. Zhang, M. Bär, and C. Heske,
Proceedings of the Electrochemical Society (ECS), 2008 Fall Meeting, Honolulu, HI. ECS Transactions 16, 109-119 (2008).

B11. “Isotope and Temperature Effects in Liquid Water”,
O. Fuchs, M. Zharnikov, L. Weinhardt, M. Blum, M. Weigand, Y. Zubavichus, M. Bär, F. Maier, W. Yang, J. D. Denlinger, C. Heske, M. Grunze, and E. Umbach,
Advanced Light Source Science Highlight, ALSNews vol. 291, 2008.

B12. “Depth-dependent band gap energies in chalcopyrite thin film solar cell absorbers”,
M. Bär, L. Weinhardt, S. Pookpanratana, C. Heske, S. Nishiwaki, W.N. Shafarman, O. Fuchs, M. Blum, W. Yang, and J.D. Denlinger,
Proc. 33^rd IEEE Photovoltaic Specialists Conference, San Diego (CA), USA, 11-16.5.2008, ISBN: 978-1-4244-1640-0, Digital Object Identifier: 10.1109/PVSC.2008.4922728.

B13. "High-Efficiency X-ray Emission Spectrometer",
O. Fuchs, L. Weinhardt, M. Blum, J.D. Denlinger, Yi-De Chuang, M. Bär, M. Weigand, R. Follath, W. McKinney, E. Gullikson, M. Jones, Ph. Batson, Z. Hussain, C. Heske, and E. Umbach,
Facility Report, Scientific Support, Advanced Light Source Activity Report, LBNL-62841, July 2007.

B14. "ALS UEC 2006 Review",
C. Heske,
Advanced Light Source Activity Report, LBNL-62841, July 2007.

B15. "The mechanism of J-V “roll-over” in CdS/CdTe devices",
J. Zhou, X. Wu, Y. Yan, S. Asher, J. L. F. Da Silva, Su-Huai Wei, L. Weinhardt, M. Bär, and C. Heske,
”Thin-Film Compound Semiconductor Photovoltaics – 2007”, Materials Research Society Symposium Proceedings, San Francisco, April 2007, Vol. 1012, p. 491-496.

B16. "Soft X-ray Liquid-Flow Cell at Beamline 8.0.1.", Facility Report, Scientific Support, Advanced Light Source Activity Report, LBNL-55917, June 2006.

B17. "Ultrafast Dynamics in Water",
M. Odelius, D. Nordlund, L.G.M. Pettersson, H. Ogasawara, O. Fuchs, L. Weinhardt, F. Maier, E. Umbach, C. Heske, Y. Zubavichus, M. Grunze, J.D. Denlinger, and A. Nilsson,
Science Highlight in the Advanced Light Source Activity Report, LBNL-55917, June 2006.

B18. "Interface chemistry between the sputter-Zn_xMg_1-xO buffer and the Cu(In,Ga)(S,Se)₂ absorber",
Ch. Loreck, I. Lauermann, A. Grimm, R. Klenk, M. Bär, S. Lehmann, S. Sokoll, M. Ch. Lux-Steiner, F. Erfurt, L. Weinhardt, C. Heske, S. Visbeck, T. P. Niesen, Ch. Jung, and Ch.-H. Fischer,
Proc. 21^st European Photovoltaic Solar Energy Conference (EPSEC), Dresden, Germany, September 2006.

B19. "Comparison of band alignments at various CdS/Cu(In,Ga)(S,Se)₂ interfaces in thin film solar cells",
L. Weinhardt, O. Fuchs, D. Groß, G. Storch, N.G. Dhere, A.A. Kadam, S.S. Kulkarni, C. Heske, and E. Umbach,
Proceedings 4^th World Conference on Photovoltaic Energy Conversion (WCPEC), Waikoloa, Hawaii, May 2006, p. 412-415.

B20. "Chemical bath deposition of CdS thin films on CuInS₂ and si substrates – a comparative x-ray emission study",
M. Bär, L. Weinhardt, O. Fuchs, J. Klaer, J. Peiser, H.-W. Schock, E. Umbach, and C. Heske,
Proceedings 4^th World Conference on Photovoltaic Energy Conversion (WCPEC), Waikoloa, Hawaii, May 2006, p. 416-419.

B21. "XES of a liquid/solid interface through a 100 nm Si₃N₄-window",
I. Lauermann, A. Grimm, M. Bär, S. Lehmann, Ch. Loreck, H. Mönig, S. Sokoll, M. Ch. Lux-Steiner, C. Heske, Ch. Jung, and Ch.-H. Fischer,
BESSY Annual Report 2005.

B22. "Cd²⁺/NH₃ Treatment-Induced Formation of a CdSe Surface Compound on CuGaSe₂ Thin Film Solar Cell Absorbers",
M. Bär, S. Lehmann, L. Weinhardt, M. Rusu, A. Grimm, I. Kötschau, I. Lauermann, P. Pistor, S. Sokoll, Th. Schedel-Niedrig, M.C. Lux-Steiner, C. Heske, Ch. Jung, and Ch.-H. Fischer,
BESSY Annual Report 2005.

B23. "Cd²⁺/NH₃ – Treatment of High-Gap CuGaSe2 Thin Film Solar Cell Absorbers",
M. Bär, M. Rusu, S. Lehmann, S. Sokoll, A. Grimm, I.M. Kötschau, I. Lauermann, P. Pistor, L. Weinhardt, O. Fuchs, C. Heske, Ch. Jung, W. Gudat, Th. Schedel-Niedrig, M.C. Lux-Steiner, and Ch.-H. Fischer,
Proc. 31st IEEE Photovoltaic Specialists Conference: Lake Buena Vista, FL, USA, January 3-7, 2005. Piscataway, NJ (USA): IEEE, 2005. ISBN 0-7803-8708-2, p. 307-310.

B24. "Compositional and electronic characterisation of Zn(O,OH) by PES for a better understanding of interfaces in chalcopyrite solar cells",
M. Bär, J. Reichardt, A. Grimm, I. Kötschau, I. Lauermann, K. Rahne, S. Sokoll, M.C. Lux-Steiner, Ch.-H. Fischer, L. Weinhardt, E. Umbach, C. Heske, C. Jung, W. Gudat and F. Karg,
BESSY Annual Report 2004.

B25. "Chemical Processes During Cd²⁺/NH₃-Tretament of Cu(In,Ga)(S,Se)₂-Absorbers",
M. Bär, H.-J. Muffler, M.C. Lux-Steiner, Ch.-H. Fischer, L. Weinhardt, C. Heske, E. Umbach, T.P. Niesen, and F. Karg,
Technical digest of the 14^th International Photovoltaic Science and Engineering Conference (PVSEC-14): Bangkok, Thailand, January 26-30, 2004.
Chulalongkorn University, 2004, ISBN 974-91793-9-0, Vol. I, p. 521-522.

B26. "X-ray Emission and Photoelectron Spectroscopy of Chalcopyrite Thin Film Solar Devices"
Ch.-H. Fischer, I. Kötschau, I. Lauermann, J. Reichardt, M.C. Lux-Steiner, L. Weinhardt, O. Fuchs, C. Heske, C. Jung, W. Gudat, and F. Karg,
BESSY Highlights 2003.

B27. "NEXAFS study of the interaction of glycine with ice layers",
G. Tzvetkov, G. Koller, M.B. Casu, R. Bauchspiess, C. Heske, E. Umbach, M.G. Ramsey, and F.P. Netzer
BESSY Annual Report 2003.

B28. "Perylene/Al₂O₃/NiAl(111): orientation-controlled organic thin films for field effect transistors",
M. B. Casu, A. Schöll, K. R. Bauchspieß, Th. Schmidt, C. Heske, and E. Umbach
BESSY Annual Report 2003.

B29. "Studying band gap opening in CdS nanoparticles by a combination of photoemission and x-ray absorption spectroscopy",
Sanjeev Joshi, S. Rügamer, C. Kumpf, T. Schmidt, R. Fink, C. Heske, E. Umbach, and S.K. Kulkarni
BESSY Annual Report 2003.

B30. "Spectroscopic analysis of Cu(In,Ga)(S,Se)₂ thin film solar devices by combining x-ray emission and photoelectron spectroscopy in the CISSY endstation",
Ch.-H. Fischer, M. Bär, A. Grimm, I. Kötschau, I. Lauermann, K. Rahne, J. Reichardt, S. Sokoll, M.C. Lux-Steiner, L. Weinhardt , O. Fuchs, G. Storch, C. Heske, C. Jung, W. Gudat, T. P. Niesen, S. Visbeck, F. Karg
BESSY Annual Report 2003.

B31. "X-Ray Emission Study of the ZnO/Cu(In,Ga)(S,Se)₂ Interface before and after Damp Heat Treatment",
I.M. Kötschau, M. Bär, Ch.-H. Fischer, A.Grimm, I. Lauermann, J. Reichardt, I. Sieber, S. Sokoll, M. C. Lux-Steiner, L. Weinhardt, O. Fuchs, C. Heske, C. Jung, W. Gudat, T. P. Niesen, and F. Karg,
Proceedings WCPEC-3, Osaka, Mai 2003, Arisumi Printing Inc, 2003. ISBN: 4-9901816-0-3, Vol.1, p.523-6.

B32. "Molecular beam epitaxial growth of CdMnSe as a promising material for spin injection"
P. Grabs, G. Richter, R. Fiederling, C. Gould, C.R. Becker, G. Schmidt, L.W. Molenkamp, W. Weigand, T. Gleim, C. Heske, and E. Umbach,
Abstract 2002 International Conference on Molecular Beam Epitaxy (Cat. No.02EX607). IEEE. 2002, pp.123-4.

B33. "CdS- and Cd(OH)₂-formation during Cd-treatments of Cu(In,Ga)(S,Se)₂ thin film solar cell absorbers",
L. Weinhardt, O. Fuchs, Th. Gleim, C. Heske, E. Umbach, M. Bär, H.-J. Muffler, Ch.‑H. Fischer, M.Ch. Lux-Steiner, Y. Zubavichus, T.P. Niesen, and F. Karg,
ALS Compendium 2002.

B34. "X-ray absorption study of selected amino acids",
O. Fuchs, L. Weinhardt, C. Heske, E. Umbach, Y. Zubavichus, M. Grunze, and J.D. Denlinger,
ALS Compendium 2002.

B35. "Studying buried interfaces with soft x-ray spectroscopy",
C. Heske,
Synchrotron Radiation in Natural Sciences 2, 35 (2003).

B36. "High-resolution photoelectron spectroscopy for the investigation of CdS nanoparticles synthesized by wet chemistry",
S. Joshi, R. Fink, C. Kumpf, T. Schmidt, C. Heske, E. Umbach,, and S. K. Kulkarni,
BESSY Annual Report 2002.

B37. "Near edge X-ray absorption fine structure of thin perylene films deposited on Al₂0₃/Ni₃Al(111) ",
M. B. Casu, A. Schöll, D. Hübner, Y. Zou, K. R. Bauchspieß, Th. Schmidt, C. Heske, and E. Umbach,
BESSY Annual Report 2002.

B38. "Spectroscopic analysis of buried interfaces in Cu(In,Ga)(S,Se)₂ thin film solar cells by combining x-ray emission and photoelectron spectroscopy in the CISSY apparatus",
Ch.-H. Fischer, M. Bär, A. Grimm, I. Kötschau, I. Lauermann, J. Reichardt, S. Sokoll, M.C. Lux-Steiner, L. Weinhardt , O. Fuchs, C. Heske, C. Jung, W. Gudat, T. P. Niesen, and F. Karg,
BESSY Annual Report 2002.

B39. "Angle-dependent resonant x-ray emission spectroscopy of PTCDA molecules on Ag(111) ",
O. Fuchs, L. Weinhardt, C. Heske, E. Umbach, Y. Zubavichus, and M. Grunze,
BESSY Annual Report 2002.

B40. "Growth of H₂O layers on an ultra-thin Al₂O₃ film: from monomeric species to ice",
G. Tzvetkov, Y. Zubavichus, Th. Schmidt, O. Fuchs, C. Heske, E. Umbach, M. Grunze, M. G. Ramsey, and F. P. Netzer,
BESSY Annual Report 2002.

B41. "Photon-induced processes in co-condensed glycine/water thin films",
G. Tzvetkov, Y. Zubavichus, G. Koller, O. Fuchs, C. Heske, E. Umbach, M. Grunze, M. G. Ramsey, and F. P. Netzer,
BESSY Annual Report 2002.

B42. "Resonant Soft X-ray Raman Spectroscopy",
C. Heske, O. Fuchs, D. Eich, A. Fleszar, L. Weinhardt, U. Groh, R. Fink, and E. Umbach,
Proceedings of the XVIII. Int. Conf. On Raman Spectroscopy (ICORS XVIII), Budapest, August 2002, John Wiley & Sons, Ltd, ISBN 0 471 49189 6, S. 41.

B43. "Asymmetry in the surface electronic structure of ZnSe(001)-c(2x2) surfaces",
L. Plucinski, R. Kosuch, W. Weigand, C. Kumpf, C. Heske, A. Fleszar, T. Schallenberg, W. Faschinger, L. Molenkamp, E. Umbach, and R.L. Johnson,
Proceedings of the Int. Conf. on the Physics of Semiconductors (ICPS), Edinburgh, August 2002, p. 29.

B44. "Resonant soft X-ray scattering of amino acid powders: first experiments with the ROSA apparatus",
C. Heske, O. Fuchs, L. Weinhardt, E. Umbach, K.-H. Hallmeier, S.A. Krasnikov, L. Zhang, R. Szargan, M. Grunze, and C. Jung,
BESSY Annual Report 2001.

B45. "X-ray fluorescence spectroscopy at U41-PGM by means of ROSA – present status and first results",
R. Szargan, K.-H. Hallmeier, R. Hesse, A. Kopczynski, S.A. Krasnikov, L. Zhang, O. Fuchs, C. Heske, E. Umbach, S. Molodtsov, F. Schiller, C. Laubschat, C. Jung, and W. Braun,
BESSY Annual Report 2001.

B46. "Electronic structure of Sr₂FeMoO₆: Resonant Inelastic X-ray Scattering (RIXS)",
K. Küpper, C. Heske, O. Fuchs, M. Matteucci, D.D. Sarma, R. Szargan, and M. Neumann,
BESSY Annual Report 2001.

B47. "Electronic structure of BeS studied by resonant inelastic x-ray scattering",
O. Fuchs, L. Weinhardt, C. Heske, E. Umbach, A. Fleszar, C. Bostedt, L.J. Terminello, and R.C.C. Perera,
ALS Compendium 2001.

B48. "Soft X-ray emission spectroscopy of the liquid-solid interface between water and a Cu(In,Ga)(S,Se)₂ thin film solar cell absorber",
C. Heske, U. Groh, O. Fuchs, L. Weinhardt, E. Umbach, Ch.-H. Fischer, Th. Schedel-Niedrig, M.Ch. Lux-Steiner, S. Zweigart, F. Karg, J.D. Denlinger, B. Rude, C. Andrus, and F. Powell,
ALS Compendium 2001.

B49. "X-ray emission spectroscopy and X-ray diffraction analysis of HgS-based mixed crystals",
E. Dynowska, B. Witkowska, W. Szuszkiewicz, C. Heske, U. Groh, O. Fuchs, D. Eich, R. Fink, and E. Umbach,
Proc. Narrow Gap Semiconductors Conference (NGS) 10, Ishikawa, Japan, IPAP Conf. Series 2, 2001, p. 119.

B50. "Band alignment at the CdS/CuIn(S,Se)₂ heterojunction in thin film solar cells",
L. Weinhardt, M. Morkel, Th. Gleim, S. Zweigart, T.P. Niesen, F. Karg, C. Heske, and E. Umbach,
Proc. 17th European Photovoltaic Solar Energy Conference, October 2001, Munich, p. 1261.

B51. "Resonant X-ray emission spectroscopy of thin organic films on ITO: PTCDA, TPD, and TPD/PTCDA",
C. Heske, U. Groh, L. Chkoda, and E. Umbach,
ALS Compendium 2000.

B52. "Thin film solar cells: Damp heat-induced sulfur oxidation at the buried ZnO/Cu(In,Ga)(S,Se)₂ and ZnO/CdS/Cu(In,Ga)(S,Se)₂ interfaces",
C. Heske, U. Groh, E. Umbach, S. Zweigart, and F. Karg,
ALS Compendium 2000.

B53. "Photoemission and X-ray emission study of the native sulfur oxidation on Cu(In,Ga)(S,Se)₂ thin film solar cell absorbers",
C. Heske, O. Fuchs, U. Groh, E. Umbach, K.H. Hallmeier, A. Preobrajenski, R. Szargan, S. Zweigart, and F. Karg,
BESSY Annual Report 2000, p. 135.

B54. "The interfacial electronic structure of CdSe/ZnTe/InAs(100)",
Th. Gleim, L. Weinhardt, Th. Schmidt, R. Fink, W. Weigand, P. Grabs, G. Schmidt, L. Molenkamp, C. Heske, H.-P. Steinrück, and E. Umbach,
BESSY Annual Report 2000, p. 187.

B55. "Influence of Te interlayers on the electronic properties of ZnSe/GaAs(100)-interfaces",
Th. Gleim, C. Heske, E. Umbach, C. Schumacher, W. Faschinger, Ch. Ammon, M. Probst, and H.-P. Steinrück,
BESSY Jahresbericht 1999.

B56. "Probing the local chemical bonding of interfacial S atoms in CdS/ZnSe superlattices",
C. Heske, U. Groh, R. Fink, E. Umbach, S. Petillon, A. Dinger, M. Grün, and C. Klingshirn,
ALS Compendium 1999.

B57. "Self-limited Na content at the buried CdS/Cu(In,Ga)Se₂ solar cell heterojunction", C. Heske, D. Eich, U. Groh, R. Fink, E. Umbach, T. van Buuren, C. Bostedt, N. Franco, L.J. Terminello, M.M. Grush, T.A. Callcott, F.J. Himpsel, D.L. Ederer, R.C.C. Perera, W. Riedl, and F. Karg,
ALS Compendium 1999.

B58. "Validity of the independent-particle approximation in x-ray photoemission: The exception, not the rule",
D.L. Hansen, O. Hemmers, H. Wang, D.W. Lindle, P. Focke, I.A. Sellin, C. Heske, H.S. Chakraborty, P.C. Deshmukh, and S.T. Manson,
ALS Compendium 1998.

B59. "X-ray Absorption Spectroscopy of Ge-Nanocluster Films",
C. Bostedt, T. van Buuren, N. Franco, C. Heske, M. Balooch, L.L. Chase, T. Möller, and L.J. Terminello,
ALS Compendium 1998.

B60. "Resonant Soft x-ray emission investigation of Be-chalcogenide thin films and superlattices",
D. Eich, U. Groh, R. Fink, C. Heske, M. Keim, G. Reuscher, A. Waag, A. Fleszar, M.M. Grush, T.A. Callcott, R.C.C. Perera, and E. Umbach,
ALS Compendium 1998.

B61. "Probing intermixing and impurity localization at a buried interface: the CdS/Cu(In,Ga)Se₂ thin film solar cell heterojunction",
C. Heske, D. Eich, R. Fink, E. Umbach, S. Kakar, M.M. Grush, T.A. Callcott, T. van Buuren, C. Bostedt, L.J. Terminello, F.J. Himpsel, D.L. Ederer, R.C.C. Perera, W. Riedl, and F. Karg,
ALS Compendium 1998.

B62. "Band Widening in Graphite",
C. Heske, R. Treusch, F.J. Himpsel, S. Kakar, L.J. Terminello, and H.J. Weyer, Swiss Light Source Annual Report 1998, Vol. VII, p. 50.

B63. "An improved microprobe using direct undulator radiation",
M.R. Weiß, V. Wüstenhagen, C. Heske, R. Fink, and E. Umbach,
in: X-Ray Microscopy V (ed. G. Schmahl, D. Rudolph, J. Thieme, and E. Umbach), Springer (Heidelberg) 1998, p. III-15.

B64. "Core level spectroscopy for surface analysis",
F.J. Himpsel, R. Treusch, I. Jimenez, A.F. Jankowski, D.G.J. Sutherland, L.J. Terminello, C. Heske, R.C.C. Perera, D.K. Shuh, W.M. Tong, J.H., anderwood, J.A. Carlisle, T.A. Callcott, J.J. Jia, D.L. Ederer, D.M. Gruen, A.R. Krauss, D.C. Zuiker, and G.L. Doll,
Critical Reviews of Optical Science and Technology, CR69, R.A. Lessard and H. Franke (editors), SPIE (Bellingham 1997), p. 357.

B65. "Band Widening in Graphite",
C. Heske, R. Treusch, F.J. Himpsel, S. Kakar, L.J. Terminello, and H.J. Weyer, ALS Compendium 1997, p. 200.

B66. "X-Ray Emission Spectroscopy of NO Molecules Adsorbed and Coadsorbed with Oxygen on Ru(001)",
M. Stichler, C. Keller, A. Föhlisch, A. Nilsson, C. Heske, W. Wurth, and D. Menzel,
ALS Compendium 1997, p. 267.

B67. "PEEM and NEXAFS studies of hard disks and sliders",
S. Anders, Th. Stammler, C.S. Bhatia, J. Stöhr, W. Fong, C.-Y. Chen, D.B. Bogy, and C. Heske,
ALS Compendium 1997, p. 237.

B68. "PEEM studies of thin film bilayers and blends of polystyrene and brominated polystyrene",
S. Anders, Th. Stammler, H. Ade, D. Slep, J. Sokolov, M. Rafailovich, C. Heske, and J. Stöhr,
ALS Compendium 1997, p. 241.

B69. "X-Ray Photoemission and Photoabsorption of Organic Electroluminescent Materials",
R. Treusch, S. Kakar, C. Heske, T. van Buuren, L.J. Terminello, F.J. Himpsel, V.V. Dinh, H.W. Lee, K. Pakbaz, G. Fox, and I. Jimenez,
ALS Compendium 1997, p. 270.

B70. "Graphitization of CVD Diamond Thin Film by X-Ray Synchrotron Radiation",
K.Y. Eun, Y.-J. Baik, C. Heske, and S. Anders,
ALS Compendium 1997, p. 234.

B71. "Formation of the Zn/CdTe(100) interface: interdiffusion, segregation, and atomic Cd-Zn exchange viewed by X-ray photoemission",
C. Heske, U. Winkler, D. Eich, Z.H. Chen, R. Fink, E. Umbach, Ch. Jung, and P.R. Bressler,
BESSY Jahresbericht 1996, p. 317.

B72. "Influence of humidity on polycrystalline Cu(In,Ga)Se₂ thin films for solar cells: a study of Na and H₂O coadsorption",
C. Heske, G. Richter, Zhonghui Chen, R. Fink, E. Umbach, W. Riedl, and F. Karg, Proc. 25th IEEE Photovoltaic Specialists Conference, May 1996, Washington, D.C., p. 861.

B73. "Surface core-level shift of the c(2x2)-reconstructed Cd-terminated Cd(Zn)Te(100) surface",
C. Heske, U. Winkler, D. Jacob, R. Fink, E. Umbach, Ch. Jung, and P.R. Bressler, BESSY Jahresbericht 1995, p. 313.

B74. "Order and electronic structure of large organic molecules on Ag and Cu surfaces",
M. Bäßler, Chr. Buchberger, D. Gador, C. Heske, J. Müller, P. Väterlein, J.U. von Schütz, R. Fink, and E. Umbach,
BESSY Jahresbericht 1995, p. 385.

B75. "Electronic structure, composition, and local surface photovoltage effects of polycrystalline Cu(In,Ga)Se₂ thin films after Na deposition",
C. Heske, R. Fink, D. Jacob, and E. Umbach,
Proc. 13th European Photovoltaic Solar Energy Conference, October 1995, Nice, France, p. 2003.

B76. "Recent achievements of the PISAM project",
M. Weiß , R. Fink, C. Heske, P. Väterlein, and E. Umbach,
BESSY Jahresbericht 1994, p. 462.

C. Conference Proceedings (as editor), Books, Book Chapters

C1. “Soft X-Ray and Electron Spectroscopy: A Unique Tool Chest to Characterize the Chemical and Electronic Properties of Surfaces and Interfaces”,
Marcus Bär, Lothar Weinhardt, and Clemens Heske,
Chapter 15 in “Advanced Characterization Techniques for Thin Film Solar Cells”, D. Abou-Ras, Th. Kirchartz, and U. Rau, (eds.), 1. Edition - March 2011, Wiley-VCH, Berlin.

C2. "Thin Film Compound Semiconductor Photovoltaics – 2009”,
Materials Research Society Symposium Proceedings, Volume 1165, A. Yamada, C. Heske, M. Contreras, M. Igalson, and S.J.C. Irvine (editors), Materials Research Society, Warrendale, PA, 2010 (ISBN 978-1-60511-138-4).

C3. “X-ray and electron spectroscopy studies of oxide semiconductors for photoelectrochemical hydrogen production”, C. Heske, L. Weinhardt, and M. Bär, Chapter 6 of “On Solar Hydrogen & Nanotechnology”, ed. L. Vayssieres, Wiley & Sons, Singapore, January 2010 (ISBN 978-0-47082-397-2).

C4. "Thin Film Compound Semiconductor Photovoltaics – 2007”,
Materials Research Society Symposium Proceedings, Volume 1012,
T. Gessert, K. Durose, C. Heske, S. Marsillac, and T. Wada (editors), Materials Research Society, Warrendale, PA, 2007 (ISBN 978-1-55899-972-5).

C5. “Interactions at surfaces and interfaces of compound semiconductors – A photoemission study of CdTe, Cd(Zn)Te, and Cu(In,Ga)Se₂”,
C. Heske,
Shaker Verlag, Aachen, 1997 (ISBN 3-8265-3215-5).