Clemens Heske heske

Prof. Dr. Clemens Heske

Prof. Dr. Clemens Heske

Current position
Previous positions
  • Associate Professor für Materials/Physical Chemistry, University of Nevada, Las Vegas
  • Wissenschaftlicher Assistent am Lehrstuhl für Experimentelle Physik II der Universität Würzburg
  • Postdoctoral Fellow an der Advanced Light Source (ALS), Lawrence Berkeley National Laboratory
  • Director of the Synchrotron Radiation Facility ANKA at KIT
Field of research
  • Surface and interface characterization of solids, liquids, and gases, with particular emphasis on materials and processes for energy conversion

Publications


  1. Direct Observation of Reactant, Intermediate, and Product Species for Nitrogen Oxide-Selective Catalytic Reduction on Cu-SSZ-13 Using In Situ Soft X-ray Spectroscopy
    Seitz, L. C.; Doronkin, D. E.; Hauschild, D.; Casapu, M.; Zengel, D.; Zimina, A.; Kreikemeyer-Lorenzo, D.; Blum, M.; Yang, W.; Grunwaldt, J.-D.; Heske, C.; Weinhardt, L.
    2022. The Journal of Physical Chemistry C. doi:10.1021/acs.jpcc.2c04736
  2. Ambient-pressure ozone treatment enables tuning of oxygen vacancy concentration in the LaSrFeO (0 ≤ x ≤ 1) perovskite oxides
    Qing, G.; Thompson, D.; Benamara, M.; Heske, C.; Greenlee, L.; Chen, J.
    2022. Materials Advances. doi:10.1039/D2MA00604A
  3. Impact of n-Butylammonium Bromide on the Chemical and Electronic Structure of Double-Cation Perovskite Thin Films
    Hauschild, D.; Seitz, L.; Gharibzadeh, S.; Steininger, R.; Jiang, N.; Yang, W.; Paetzold, U. W.; Heske, C.; Weinhardt, L.
    2021. ACS Applied Materials and Interfaces, 13 (44), 53202–53210. doi:10.1021/acsami.1c15707
  4. Coupling methylammonium and formamidinium cations with halide anions: Hybrid orbitals, hydrogen bonding, and the role of dynamics
    Kamal, C.; Weinhardt, L.; Odelius, M.; Hauschild, D.; Seitz, L.; Steininger, R.; Yang, W.; Heske, C.
    2021. Journal of Physical Chemistry C, 125 (46), 25917–25926. doi:10.1021/acs.jpcc.1c08932
  5. Impact of substrate temperature during NaF and KF post-deposition treatments on chemical and optoelectronic properties of alkali-free Cu(In,Ga)Se₂ thin film solar cell absorbers
    Eslam, A.; Wuerz, R.; Hauschild, D.; Weinhardt, L.; Hempel, W.; Powalla, M.; Heske, C.
    2021. Thin Solid Films, 739, Article no: 138979. doi:10.1016/j.tsf.2021.138979
  6. Using the inelastic background in hard x-ray photoelectron spectroscopy for a depth-resolved analysis of the CdS/Cu(In,Ga)Se₂ interface
    Hauschild, D.; Steininger, R.; Hariskos, D.; Witte, W.; Tougaard, S.; Heske, C.; Weinhardt, L.
    2021. Journal of vacuum science & technology / A, 39 (6), Article no: 063216. doi:10.1116/6.0001336
  7. Efficient passivation of n-type and p-type silicon surface defects by hydrogen sulfide gas reaction
    Das, U. K.; Theisen, R.; Hua, A.; Upadhyaya, A.; Lam, I.; Mouri, T. K.; Jiang, N.; Hauschild, D.; Weinhardt, L.; Yang, W.; Rohatgi, A.; Heske, C.
    2021. Journal of physics / Condensed matter, 33 (46), Article no: 464002. doi:10.1088/1361-648X/ac1ec8
  8. Sulfate Speciation Analysis Using Soft X-ray Emission Spectroscopy
    Weinhardt, L.; Hauschild, D.; Steininger, R.; Jiang, N.; Blum, M.; Yang, W.; Heske, C.
    2021. Analytical chemistry, 93 (23), 8300–8308. doi:10.1021/acs.analchem.1c01187
  9. Steep sulfur gradient in CZTSSe solar cells by HS-assisted rapid surface sulfurization
    Taskesen, T.; Pareek, D.; Hauschild, D.; Haertel, A.; Weinhardt, L.; Yang, W.; Pfeiffelmann, T.; Nowak, D.; Heske, C.; Gütay, L.
    2021. RSC Advances, 11 (21), 12687–12695. doi:10.1039/d1ra00494h
  10. Dynamic Effects and Hydrogen Bonding in Mixed-Halide Perovskite Solar Cell Absorbers
    Wilks, R. G.; Erbing, A.; Sadoughi, G.; Starr, D. E.; Handick, E.; Meyer, F.; Benkert, A.; Iannuzzi, M.; Hauschild, D.; Yang, W.; Blum, M.; Weinhardt, L.; Heske, C.; Snaith, H. J.; Odelius, M.; Bär, M.
    2021. The journal of physical chemistry letters, 12, 3885–3890. doi:10.1021/acs.jpclett.1c00745
  11. Chemical Structure of a Carbon-Rich Layer at the Wet-Chemical Processed CuZnSn(S,Se)/Mo Interface
    Hauschild, D.; Wachs, S. J.; Kogler, W.; Seitz, L.; Carter, J.; Schnabel, T.; Krause, B.; Blum, M.; Yang, W.; Ahlswede, E.; Heske, C.; Weinhardt, L.
    2021. IEEE Journal of Photovoltaics. doi:10.1109/JPHOTOV.2021.3059423
  12. Observation of Double Excitations in the Resonant Inelastic X-ray Scattering of Nitric Oxide
    Fouda, A. E. A.; Seitz, L. C.; Hauschild, D.; Blum, M.; Yang, W.; Heske, C.; Weinhardt, L.; Besley, N. A.
    2020. The journal of physical chemistry letters, 11 (18), 7476–7482. doi:10.1021/acs.jpclett.0c01981
  13. X-SPEC: a 70 eV to 15 keV undulator beamline for X-ray and electron spectroscopies
    Weinhardt, L.; Steininger, R.; Kreikemeyer-Lorenzo, D.; Mangold, S.; Hauschild, D.; Batchelor, D.; Spangenberg, T.; Heske, C.
    2021. Journal of synchrotron radiation, 28 (Part2), 609–617. doi:10.1107/S1600577520016318
  14. Impact of UV-induced ozone and low-energy Ar-ion cleaning on the chemical structure of Cu(In,Ga)(S,Se)absorber surfaces
    Van Maris, V. R.; Hauschild, D.; Niesen, T. P.; Eraerds, P.; Dalibor, T.; Palm, J.; Blum, M.; Yang, W.; Heske, C.; Weinhardt, L.
    2020. Journal of applied physics, 128 (15), Art. Nr.: 155301. doi:10.1063/5.0020253
  15. Hybrid chemical bath deposition-CdS/sputter-Zn(O,S) alternative buffer for Cu2ZnSn(S,Se)4 based solar cells editors-pick
    Kogler, W.; Schnabel, T.; Ahlswede, E.; Taskesen, T.; Gütay, L.; Hauschild, D.; Weinhardt, L.; Heske, C.; Seeger, J.; Hetterich, M.; Powalla, M.
    2020. Journal of applied physics, 127 (16), 165301. doi:10.1063/1.5142550
  16. Semitransparent Sb2S3 thin film solar cells by ultrasonic spray pyrolysis for use in solar windows
    Eensalu, J. S.; Katerski, A.; Kärber, E.; Weinhardt, L.; Blum, M.; Heske, C.; Yang, W.; Oja Acik, I.; Krunks, M.
    2019. Beilstein journal of nanotechnology, 10, 2396–2409. doi:10.3762/bjnano.10.230
  17. Variations in the Chemical and Electronic Impact of Post-Deposition Treatments on Cu(In,Ga)(S,Se) Absorbers
    Mezher, M.; Mansfield, L. M.; Horsley, K.; Yang, W.; Blum, M.; Weinhardt, L.; Ramanathan, K.; Heske, C.
    2019. ACS applied energy materials, 2 (12), 8641–8648. doi:10.1021/acsaem.9b01565
  18. Electrolyte Stability and Discharge Products of an Ionic-Liquid-Based Li-O₂ Battery Revealed by Soft X-ray Emission Spectroscopy
    Leon, A.; Fiedler, A.; Blum, M.; Yang, W.; Bär, M.; Scheiba, F.; Ehrenberg, H.; Heske, C.; Weinhardt, L.
    2019. The journal of physical chemistry <Washington, DC> / C, 123 (51), 30827–30832. doi:10.1021/acs.jpcc.9b08777
  19. Modifications of the CZTSe/Mo back-contact interface by plasma treatments
    Chen, W.; Taskesen, T.; Nowak, D.; Mikolajczak, U.; Sayed, M. H.; Pareek, D.; Ohland, J.; Schnabel, T.; Ahlswede, E.; Hauschild, D.; Weinhardt, L.; Heske, C.; Parisi, J.; Gütay, L.
    2019. RSC Advances, 9 (46), 26850–26855. doi:10.1039/c9ra02847a
  20. Intermixing at the InS/CuZnSn(S,Se) Heterojunction and Its Impact on the Chemical and Electronic Interface Structure
    Hauschild, D.; Mezher, M.; Schnabel, T.; Spiering, S.; Kogler, W.; Carter, J.; Blum, M.; Yang, W.; Ahlswede, E.; Heske, C.; Weinhardt, L.
    2019. ACS applied energy materials, 2 (6), 4098–4104. doi:10.1021/acsaem.9b00263
  21. Local electronic structure of the peptide bond probed by resonant inelastic soft X-ray scattering
    Weinhardt, L.; Benkert, A.; Meyer, F.; Blum, M.; Hauschild, D.; Wilks, R. G.; Bär, M.; Yang, W.; Zharnikov, M.; Reinert, F.; Heske, C.
    2019. Physical chemistry, chemical physics. doi:10.1039/c9cp02481f
  22. Molybdenum Disulfide Catalytic Coatings via Atomic Layer Deposition for Solar Hydrogen Production from Copper Gallium Diselenide Photocathodes
    Hellstern, T. R.; Palm, D. W.; Carter, J.; Deangelis, A. D.; Horsley, K.; Weinhardt, L.; Yang, W.; Blum, M.; Gaillard, N.; Heske, C.; Jaramillo, T. F.
    2019. ACS applied energy materials, 2 (2), 1060–1066. doi:10.1021/acsaem.8b01562
  23. Cadmium free Cu₂ZnSnS₄ solar cells with 9.7% efficiency
    Larsen, J. K.; Larsson, F.; Törndahl, T.; Saini, N.; Riekehr, L.; Ren, Y.; Biswal, A.; Hauschild, D.; Weinhardt, L.; Heske, C.; Platzer-Björkman, C.
    2019. Advanced energy materials, 1900439. doi:10.1002/aenm.201900439
  24. Surface and Interface Properties in Thin-Film Solar Cells: Using Soft X-rays and Electrons to Unravel the Electronic and Chemical Structure
    Weinhardt, L.; Hauschild, D.; Heske, C.
    2019. Advanced materials, 31 (26), Article: 1806660. doi:10.1002/adma.201806660
  25. Rubidium Fluoride Post-Deposition Treatment: Impact on the Chemical Structure of the Cu(In,Ga)Se2 Surface and CdS/Cu(In,Ga)Se2 Interface in Thin-Film Solar Cells
    Kreikemeyer-Lorenzo, D.; Hauschild, D.; Jackson, P.; Friedlmeier, T. M.; Hariskos, D.; Blum, M.; Yang, W.; Reinert, F.; Powalla, M.; Heske, C.; Weinhardt, L.
    2018. ACS applied materials & interfaces, 10 (43), 37602–37608. doi:10.1021/acsami.8b10005
  26. Site-specific electronic structure of imidazole and imidazolium in aqueous solutions
    Meyer, F.; Blum, M.; Benkert, A.; Hauschild, D.; Jeyachandran, Y. L.; Wilks, R. G.; Yang, W.; Bär, M.; Reinert, F.; Heske, C.; Zharnikov, M.; Weinhardt, L.
    2018. Physical chemistry, chemical physics, 20 (12), 8302–8310. doi:10.1039/C7CP07885D
  27. Improving performance by Na doping of a buffer layer—chemical and electronic structure of the InxSy:Na/CuIn(S,Se)2 thin‐film solar cell interface
    Hauschild, D.; Meyer, F.; Benkert, A.; Kreikemeyer-Lorenzo, D.; Dalibor, T.; Palm, J.; Blum, M.; Yang, W.; Wilks, R. G.; Bär, M.; Reinert, F.; Heske, C.; Weinhardt, L.
    2018. Progress in photovoltaics, 26 (5), 359–366. doi:10.1002/pip.2993
  28. Impact of a RbF Postdeposition Treatment on the Electronic Structure of the CdS/Cu(In,Ga)Se2 Heterojunction in High-Efficiency Thin-Film Solar Cells
    Hauschild, D.; Kreikemeyer-Lorenzo, D.; Jackson, P.; Friedlmeier, T. M.; Hariskos, D.; Reinert, F.; Powalla, M.; Heske, C.; Weinhardt, L.
    2017. ACS energy letters, 2 (10), 2383–2387. doi:10.1021/acsenergylett.7b00720
  29. Zn-Se-Cd-S Interlayer Formation at the CdS/Cu₂ZnSnSe₄ Thin-Film Solar Cell Interface
    Bär, M.; Repins, I.; Weinhardt, L.; Alsmeier, J.-H.; Pookpanratana, S.; Blum, M.; Yang, W.; Heske, C.; Wilks, R. G.; Noufi, R.
    2017. ACS energy letters, 2 (7), 1632–1640. doi:10.1021/acsenergylett.7b00140
  30. KF post-deposition treatment of industrial Cu(In, Ga)(S, Se)2 thin-film surfaces: Modifying the chemical and electronic structure
    Mezher, M.; Mansfield, L. M.; Horsley, K.; Blum, M.; Wieting, R.; Weinhardt, L.; Ramanathan, K.; Heske, C.
    2017. Applied physics letters, 111 (7), Art. Nr.: 071601. doi:10.1063/1.4998445
  31. X-ray Emission Spectroscopy of Proteinogenic Amino Acids at All Relevant Absorption Edges
    Meyer, F.; Blum, M.; Benkert, A.; Hauschild, D.; Jeyachandran, Y. L.; Wilks, R. G.; Yang, W.; Bär, M.; Heske, C.; Reinert, F.; Zharnikov, M.; Weinhardt, L.
    2017. The journal of physical chemistry <Washington, DC> / B, 121 (27), 6549–6556. doi:10.1021/acs.jpcb.7b04291
  32. Valence Electronic Structure of Li₂O₂, Li₂O, Li₂CO₃, and LiOH Probed by Soft X-ray Emission Spectroscopy
    Léon, A.; Fiedler, A.; Blum, M.; Benkert, A.; Meyer, F.; Yang, W.; Bär, M.; Scheiba, F.; Ehrenberg, H.; Weinhardt, L.; Heske, C.
    2017. The journal of physical chemistry <Washington, DC> / C, 121 (10), 5460–5466. doi:10.1021/acs.jpcc.6b11119
  33. High-efficiency in situ resonant inelastic x-ray scattering (iRIXS) endstation at the Advanced Light Source
    Qiao, R.; Li, Q.; Zhuo, Z.; Sallis, S.; Fuchs, O.; Blum, M.; Weinhardt, L.; Heske, C.; Pepper, J.; Jones, M.; Brown, A.; Spucces, A.; Chow, K.; Smith, B.; Glans, P.-A.; Chen, Y.; Yan, S.; Pan, F.; Piper, L. F. J.; Denlinger, J.; Guo, J.; Hussain, Z.; Chuang, Y.-D.; Yang, W.
    2017. Review of scientific instruments, 88 (3), 033106. doi:10.1063/1.4977592
  34. Formation of a K-In-Se surface species by NaF/KF postdeposition treatment of Cu(In,Ga)Se2 thin-film solar cell absorbers
    Handick, E.; Reinhard, P.; Wilks, R. G.; Pianezzi, F.; Kunze, T.; Kreikemeyer-Lorenzo, D.; Weinhardt, L.; Blum, M.; Yang, W.; Gorgoi, M.; Ikenaga, E.; Gerlach, D.; Ueda, S.; Yamashita, Y.; Chikyow, T.; Heske, C.; Buecheler, S.; Tiwari, A. N.; Bär, M.
    2017. ACS applied materials & interfaces, 9 (4), 3581–3589. doi:10.1021/acsami.6b11892
  35. The effect of NaCl on room-temperature-processed indium oxide nanoparticle thin films for printed electronics
    Häming, M.; Baby, T. T.; Garlapati, S. K.; Krause, B.; Hahn, H.; Dasgupta, S.; Weinhardt, L.; Heske, C.
    2017. Applied surface science, 396, 912–919. doi:10.1016/j.apsusc.2016.11.060
  36. Soft X-ray Spectroscopy of a Complex Heterojunction in High-Efficiency Thin-Film Photovoltaics: Intermixing and Zn Speciation at the Zn(O,S)/Cu(In,Ga)Se₂ Interface
    Mezher, M.; Garris, R.; Mansfield, L. M.; Blum, M.; Hauschild, D.; Horsley, K.; Duncan, D. A.; Yang, W.; Bär, M.; Weinhardt, L.; Ramanathan, K.; Heske, C.
    2016. ACS applied materials & interfaces, 8 (48), 33256–33263. doi:10.1021/acsami.6b09245
  37. Towards Printed Organic Light-Emitting Devices: A Solution-Stable, Highly Soluble Cu-NHetPHOS
    Wallesch, M.; Verma, A.; Fléchon, C.; Flügge, H.; Zink, D. M.; Seifermann, S. M.; Navarro, J. M.; Vitova, T.; Göttlicher, J.; Steininger, R.; Weinhardt, L.; Zimmer, M.; Gerhards, M.; Heske, C.; Bräse, S.; Baumann, T.; Volz, D.
    2016. Chemistry - a European journal, 22 (46), 16400–16405. doi:10.1002/chem.201603847
  38. A New Look at the Electronic Structure of Transparent Conductive Oxides-A Case Study of the Interface between Zinc Magnesium Oxide and Cadmium Telluride
    Duncan, D. A.; Mendelsberg, R.; Mezher, M.; Horsley, K.; Rosenberg, S. G.; Blum, M.; Xiong, G.; Weinhardt, L.; Gloeckler, M.; Heske, C.
    2016. Advanced materials interfaces, 3 (22), Article no 1600418. doi:10.1002/admi.201600418
  39. Band-Gap Widening at the Cu(In,Ga)(S,Se)(2) Surface: A Novel Determination Approach Using Reflection Electron Energy Loss Spectroscopy
    Hauschild, D.; Handick, E.; Goehl-Gusenleitner, S.; Meyer, F.; Schwab, H.; Benkert, A.; Pohlner, S.; Palm, J.; Tougaard, S.; Heske, C.; Weinhardt, L.; Reinert, F.
    2016. ACS applied materials & interfaces, 8 (32), 21101–21105. doi:10.1021/acsami.6b06358
  40. Electronic structure of the Zn(O,S)/Cu(In,Ga)Se₂ thin-film solar cell interface
    Mezher, M.; Garris, R.; Mansfield, L. M.; Horsley, K.; Weinhardt, L.; Duncan, D. A.; Blum, M.; Rosenberg, S. G.; Bär, M.; Ramanathan, K.; Heske, C.
    2016. Progress in photovoltaics, 24 (8), 1142–1148. doi:10.1002/pip.2764
  41. Investigation of the Ionic Hydration in Aqueous Salt Solutions by Soft X-ray Emission Spectroscopy
    Jeyachandran, Y. L.; Meyer, F.; Benkert, A.; Bär, M.; Blum, M.; Yang, W.; Reinert, F.; Heske, C.; Weinhardt, L.; Zharnikov, M.
    2016. The journal of physical chemistry <Washington, DC> / B, 120 (31), 7687–7695. doi:10.1021/acs.jpcb.6b03952
  42. Impact of Annealing-Induced Intermixing on the Electronic Level Alignment at the In₂S₃/Cu(In,Ga)Se₂ Thin-Film Solar Cell Interface
    Bär, M.; Barreau, N.; Couzinié-Devy, F.; Weinhardt, L.; Wilks, R. G.; Kessler, J.; Heske, C.
    2016. ACS applied materials & interfaces, 8 (3), 2120–2124. doi:10.1021/acsami.5b10614
  43. Isotope Effects in the Resonant Inelastic Soft X-ray Scattering Maps of Gas-Phase Methanol
    Benkert, A.; Meyer, F.; Hauschild, D.; Blum, M.; Yang, W.; Wilks, R. G.; Baer, M.; Reinert, F.; Heske, C.; Weinhardt, L.
    2016. The journal of physical chemistry <Washington, DC> / A, 120 (14), 2260–2267. doi:10.1021/acs.jpca.6b02636
  44. Site- and Symmetry-Resolved Resonant X-ray Emission Study of a Highly Ordered PTCDA Thin Film
    Weinhardt, L.; Fuchs, O.; Fischer, A.; Weigand, M.; Meyer, F.; Benkert, A.; Blum, M.; Bär, M.; Pookpanratana, S.; Denlinger, J.; Heske, C.; Umbach, E.
    2016. The journal of physical chemistry <Washington, DC> / C, 120 (16), 8607–8615. doi:10.1021/acs.jpcc.5b12422
  45. Introduction. Spectroscopy of energy materials
    Eberhardt, W.; Heske, C. (Eds.)
    2013. Journal of Electron Spectroscopy and Related Phenomena, 190 (PART A), 1. doi:10.1016/j.elspec.2013.11.001
  46. The electrochemical reduction of PdCl4 2- and PdCl6 2- in polyaniline: Influence of Pd deposit morphology on methanol oxidation in alkaline solution
    Hatchett, D. W.; Millick, N. M.; Kinyanjui, J. M.; Pookpanratana, S.; Bär, M.; Hofmann, T.; Luinetti, A.; Heske, C.
    2011. Electrochimica Acta, 56 (17), 6060–6070. doi:10.1016/j.electacta.2011.04.083
  47. Electronic structure of Cu2ZnSnS4 probed by soft x-ray emission and absorption spectroscopy
    Bär, M.; Schubert, B.-A.; Marsen, B.; Schorr, S.; Wilks, R. G.; Weinhardt, L.; Pookpanratana, S.; Blum, M.; Krause, S.; Zhang, Y.; Yang, W.; Unold, T.; Heske, C.; Schock, H.-W.
    2011. Physical Review B - Condensed Matter and Materials Physics, 84 (3), 035308. doi:10.1103/PhysRevB.84.035308
  48. Facile synthesis of highly photoactive α-Fe2O 3-based films for water oxidation
    Wang, G.; Ling, Y.; Wheeler, D. A.; George, K. E. N.; Horsley, K.; Heske, C.; Zhang, J. Z.; Li, Y.
    2011. Nano letters, 11 (8), 3503–3509. doi:10.1021/nl202316j
  49. Nuclear dynamics in the core-excited state of aqueous ammonia probed by resonant inelastic soft x-ray scattering
    Weinhardt, L.; Weigand, M.; Fuchs, O.; Bär, M.; Blum, M.; Denlinger, J. D.; Yang, W.; Umbach, E.; Heske, C.
    2011. Physical Review B - Condensed Matter and Materials Physics, 84 (10), 104202. doi:10.1103/PhysRevB.84.104202
  50. Native oxidation and Cu-poor surface structure of thin film Cu 2ZnSnS4 solar cell absorbers
    Bär, M.; Schubert, B.-A.; Marsen, B.; Krause, S.; Pookpanratana, S.; Unold, T.; Weinhardt, L.; Heske, C.; Schock, H.-W.
    2011. Applied Physics Letters, 99 (11), 112103. doi:10.1063/1.3637574
  51. Soft x-ray emission spectroscopy studies of the electronic structure of silicon supersaturated with sulfur
    Sullivan, J. T.; Wilks, R. G.; Winkler, M. T.; Weinhardt, L.; Recht, D.; Said, A. J.; Newman, B. K.; Zhang, Y.; Blum, M.; Krause, S.; Yang, W. L.; Heske, C.; Aziz, M. J.; Br, M.; Buonassisi, T.
    2011. Applied Physics Letters, 99 (14), 142102. doi:10.1063/1.3643050
  52. Synthesis and characterization of conductive polyimide/carbon composites with Pt surface deposits
    Kinyanjui, J. M.; Hatchett, D. W.; Castruita, G.; Ranasinghe, A. D.; Weinhardt, L.; Hofmann, T.; Heske, C.
    2011. Synthetic metals, 161 (21-22), 2368–2377. doi:10.1016/j.synthmet.2011.08.046
  53. Impact of KCN etching on the chemical and electronic surface structure of Cu2ZnSnS4 thin-film solar cell absorbers
    Bär, M.; Schubert, B.-A.; Marsen, B.; Krause, S.; Pookpanratana, S.; Unold, T.; Weinhardt, L.; Heske, C.; Schock, H.-W.
    2011. Applied physics letters, 99 (15), 152111. doi:10.1063/1.3650717
  54. Probing hydrogen bonding orbitals: resonant inelastic soft X-ray scattering of aqueous NH₃
    Weinhardt, L.; Ertan, E.; Iannuzzi, M.; Weigand, M.; Fuchs, O.; Bär, M.; Blum, M.; Denlinger, J. D.; Yang, W.; Umbach, E.; Odelius, M.; Heske, C.
    2015. Physical chemistry, chemical physics, 17, 27145–27153. doi:10.1039/C5CP04898B
  55. Annealing-induced effects on the chemical structure of the In₂S₃/CuIn(S,Se)₂ thin-film solar cell interface
    Hauschild, D.; Meyer, F.; Benkert, A.; Kreikemeyer-Lorenzo, D.; Pohlner, S.; Palm, J.; Blum, M.; Yang, W.; Wilks, R. G.; Bär, M.; Heske, C.; Weinhardt, L.; Reinert, F.
    2015. The journal of physical chemistry <Washington, DC> / C, 119 (19), 10412–10416. doi:10.1021/acs.jpcc.5b01622
  56. Characterization of Sulfur bonding in CdS:O buffer layers for CdTe-based thin-film solar cells
    Kephart, J. M.; Horsley, K.; Blum, M.; Mezher, M.; Weinhardt, L.; Häming, M.; Wilks, R. G.; Hofmann, T.; Yang, W.; Bär, M.; Sampath, W. S.; Heske, C.
    2015. ACS applied materials & interfaces, 7 (30), 16382–16386. doi:10.1021/acsami.5b03503
  57. Cliff-like conduction band offset and KCN-induced recombination barrier enhancement at the CdS/Cu2ZnSnS4 thin-film solar cell heterojunction
    Bär, M.; Schubert, B.-A.; Marsen, B.; Wilks, R. G.; Pookpanratana, S.; Blum, M.; Krause, S.; Unold, T.; Yang, W.; Weinhardt, L.; Heske, C.; Schock, H.-W.
    2011. Applied Physics Letters, 99 (22), 222105/1–3. doi:10.1063/1.3663327
  58. Microstructure of vanadium-based contacts on n-type GaN
    Pookpanratana, S.; France, R.; Félix, R.; Wilks, R.; Weinhardt, L.; Hofmann, T.; Bismaths, L. T.; Mulcahy, S.; Kronast, F.; Moustakas, T. D.; Bär, M.; Heske, C.
    2012. Journal of physics / D, 45 (10), Art.Nr. 105401. doi:10.1088/0022-3727/45/10/105401
  59. Cu 2ZnSnS 4 thin-film solar cell absorbers illuminated by soft x-rays
    Bär, M.; Schubert, B.-A.; Marsen, B.; Wilks, R. G.; Blum, M.; Krause, S.; Pookpanratana, S.; Zhang, Y.; Unold, T.; Yang, W.; Weinhardt, L.; Heske, C.; Schock, H.-W.
    2012. Journal of Materials Research, 27 (8), 1097–1104. doi:10.1557/jmr.2012.59
  60. Nuclear dynamics and spectator effects in resonant inelastic soft x-ray scattering of gas-phase water molecules
    Weinhardt, L.; Benkert, A.; Meyer, F.; Blum, M.; Wilks, R. G.; Yang, W.; Bär, M.; Reinert, F.; Heske, C.
    2012. The journal of chemical physics, 136 (14), Art.Nr. 144312. doi:10.1063/1.3702644
  61. Ultrafast proton dynamics in aqueous amino acid solutions studied by resonant inelastic soft X-ray scattering
    Blum, M.; Odelius, M.; Weinhardt, L.; Pookpanratana, S.; Bär, M.; Zhang, Y.; Fuchs, O.; Yang, W.; Umbach, E.; Heske, C.
    2012. Journal of Physical Chemistry B, 116 (46), 13757–13764. doi:10.1021/jp302958j
  62. Surface off-stoichiometry of CuInS2 thin-film solar cell absorbers
    Bär, M.; Klaer, J.; Félix, R.; Barreau, N.; Weinhardt, L.; Wilks, R. G.; Heske, C.; Schock, H.-W.
    2013. IEEE Journal of Photovoltaics, 3 (2), 828–832. doi:10.1109/JPHOTOV.2012.2228299
  63. Using photoelectron spectroscopy and quantum mechanics to determine d-band energies of metals for catalytic applications
    Hofmann, T.; Yu, T. H.; Folse, M.; Weinhardt, L.; Bär, M.; Zhang, Y.; Merinov, B. V.; Myers, D. J.; Goddard, W. A.; Heske, C.
    2012. Journal of Physical Chemistry C, 116 (45), 24016–24026. doi:10.1021/jp303276z
  64. Bridging the efficiency gap: Fully bridged dinuclear Cu(I)-complexes for singlet harvesting in high-efficiency OLEDs
    Volz, D.; Chen, Y.; Wallesch, M.; Liu, R.; Flechon, C.; Zink, D. M.; Friedrichs, J.; Flügge, H.; Steininger, R.; Göttlicher, J.; Heske, C.; Weinhardt, L.; Bräse, S.; So, F.; Baumann, T.
    2015. Advanced materials, 27, 2538–2543. doi:10.1002/adma.201405897
  65. Electron-hole correlation effects in core-level spectroscopy probed by the resonant inelastic soft x-ray scattering map of C₆₀
    Weinhardt, L.; Fuchs, O.; Batchelor, D.; Bär, M.; Blum, M.; Denlinger, J. D.; Yang, W.; Schöll, A.; Reinert, F.; Umbach, E.; Heske, C.
    2011. Journal of Chemical Physics, 135, 104705/1–5. doi:10.1063/1.3633953
  66. Non-equivalent carbon atoms in the resonant inelastic soft X-ray scattering map of cysteine
    Meyer, F.; Weinhardt, L.; Blum, M.; Bär, M.; Wilks, R. G.; Yang, F. W.; Heske, C.; Reinert, F.
    2013. Journal of Chemical Physics, 138 (3), 034306/1–5. doi:10.1063/1.4774059
  67. Controlling the electron-deficiency of self-assembling pyrazine-acenes: A collaborative experimental and theoretical investigation
    Brownell, L. V.; Jang, K.; Robins, K. A.; Tran, I. C.; Heske, C.; Lee, D.-C.
    2013. Physical chemistry, chemical physics, 15 (16), 5967–5974. doi:10.1039/c3cp43886d
  68. Reply to "comment on ’using photoelectron spectroscopy and quantum mechanics to determine D-band energies of metals for catalytic applications’"
    Hofmann, T.; Yu, T. H.; Folse, M.; Weinhardt, L.; Bär, M.; Zhang, Y.; Merinov, B. V.; Myers, D. J.; Goddard, W. A.; Heske, C.
    2013. Journal of Physical Chemistry C, 117 (13), 6916–6917. doi:10.1021/jp401620e
  69. The Be K-edge in beryllium oxide and chalcogenides: Soft x-ray absorption spectra from first-principles theory and experiment
    Olovsson, W.; Weinhardt, L.; Fuchs, O.; Tanaka, I.; Puschnig, P.; Umbach, E.; Heske, C.; Draxl, C.
    2013. Journal of Physics: Condensed Matter, 25 (31), 315501/1–6. doi:10.1088/0953-8984/25/31/315501
  70. Cu₂₋ₓS surface phases and their impact on the electronic structure of CuInS₂ thin films - a hidden parameter in solar cell optimization
    Bär, M.; Klaer, J.; Weinhardt, L.; Wilks, R. G.; Krause, S.; Blum, M.; Yang, W.; Heske, C.; Schock, H.-W.
    2013. Advanced Energy Materials, 3 (6), 777–781. doi:10.1002/aenm.201200946
  71. RIXS investigations of liquids, solutions, and liquid/solid interfaces
    Weinhardt, L.; Blum, M.; Fuchs, O.; Benkert, A.; Meyer, F.; Bär, M.; Denlinger, J. D.; Yang, W.; Reinert, F.; Heske, C.
    2013. Journal of electron spectroscopy and related phenomena, 188, 111–120. doi:10.1016/j.elspec.2012.10.006
  72. Soft X-rays shedding light on thin-film solar cell surfaces and interfaces
    Bär, M.; Pookpanratana, S.; Weinhardt, L.; Wilks, R. G.; Schubert, B. A.; Marsen, B.; Unold, T.; Blum, M.; Krause, S.; Zhang, Y.; Ranasinghe, A.; Ramanathan, K.; Repins, I.; Contreras, M. A.; Nishiwaki, S.; Liu, X.; Paudel, N. R.; Fuchs, O.; Niesen, T. P.; Yang, W.; Karg, F.; Compaan, A. D.; Shafarman, W. N.; Noufi, R.; Schock, H.-W.; Heske, C.
    2013. Journal of electron spectroscopy and related phenomena, 190 (PART A), 47–53. doi:10.1016/j.elspec.2012.10.004
  73. Soft X-ray and electron spectroscopy to determine the electronic structure of materials for photoelectrochemical hydrogen production
    Weinhardt, L.; Blum, M.; Fuchs, O.; Pookpanratana, S.; George, K.; Cole, B.; Marsen, B.; Gaillard, N.; Miller, E.; Ahn, K.-S.; Shet, S.; Yan, Y.; Al-Jassim, M. M.; Denlinger, J. D.; Yang, W.; Bär, M.; Heske, C.
    2013. Journal of Electron Spectroscopy and Related Phenomena, 190 (PART A), 106–112. doi:10.1016/j.elspec.2012.11.015
  74. Finding correlations of the oxygen reduction reaction activity of transition metal catalysts with parameters obtained from quantum mechanics
    Yu, T. H.; Hofmann, T.; Sha, Y.; Merinov, B. V.; Myers, D. J.; Heske, C.; Goddard, W. A.
    2013. Journal of Physical Chemistry C, 117 (50), 26598–26607. doi:10.1021/jp4071554
  75. Setup for in situ investigation of gases and gas/solid interfaces by soft x-ray emission and absorption spectroscopy
    Benkert, A.; Blum, M.; Meyer, F.; Wilks, R. G.; Yang, W.; Bär, M.; Reinert, F.; Heske, C.; Weinhardt, L.
    2014. Review of Scientific Instruments, 85 (1), 015119/1–5. doi:10.1063/1.4862059
  76. "Building Block Picture" of the electronic structure of aqueous cysteine derived from resonant Inelastic soft X-ray scattering
    Meyer, F.; Blum, M.; Benkert, A.; Hauschild, D.; Nagarajan, S.; Wilks, R. G.; Andersson, J.; Yang, W.; Zharnikov, M.; Bär, M.; Heske, C.; Reinert, F.; Weinhardt, L.
    2014. The journal of physical chemistry <Washington, DC> / B, 118, 13142–13150. doi:10.1021/jp5089417
  77. Ion-solvation-induced molecular reorganization in liquid water probed by resonant inelastic soft X-ray scattering
    Jeyachandran, Y. L.; Meyer, F.; Nagarajan, S.; Benkert, A.; Bär, M.; Blum, M.; Yang, W.; Reinert, F.; Heske, C.; Weinhardt, L.; Zharnikov, M.
    2014. The journal of physical chemistry letters, 5, 4143–4148. doi:10.1021/jz502186a
  78. Impact of annealing on the chemical structure and morphology of the thin-film CdTe/ZnO interface
    Horsley, K.; Beal, R. J.; Wilks, R. G.; Blum, M.; Häming, M.; Hanks, D. A.; Weir, M. G.; Hofmann, T.; Weinhardt, L.; Bär, M.; Potter Jr., B. G.; Heske, C.
    2014. Journal of applied physics, 116, 024312/1–12. doi:10.1063/1.4890235
  79. Impact of environmental conditions on the chemical surface properties of Cu(In,Ga)(S,Se)₂ thin-film solar cell absorbers
    Hauschild, D.; Meyer, F.; Pohlner, S.; Lechner, R.; Dietmüller, R.; Palm, J.; Heske, C.; Weinhardt, L.; Reinert, F.
    2014. Journal of applied physics, 115, 183707/1–5. doi:10.1063/1.4876257
  80. Labile or stable: Can homoleptic and heteroleptic pyrphos-copper complexes be processed from solution?
    Volz, D.; Wallesch, M.; Grage, S. L.; Göttlicher, J.; Steininger, R.; Batchelor, D.; Vitova, T.; Ulrich, A. S.; Heske, C.; Weinhardt, L.; Baumann, T.; Bräse, S.
    2014. Inorganic chemistry frontiers, 53, 7837–7847. doi:10.1021/ic500135m
  81. Status of the development of superconducting undulators at ANKA
    Casalbuoni, S.; Baumbach, T.; Gerstl, S.; Grau, A.; Hagelstein, M.; Heske, C.; Holubek, T.; De Jauregui, D. S.; Boffo, C.; Walter, W.
    2013. Journal of physics / Conference Series, 425 (PART 3), Art.Nr. 032008. doi:10.1088/1742-6596/425/3/032008

Further Publications

 

  1. „Impact of Sodium Doping on the Electronic and Chemical Structure of Indium Sulfide Buffer Layers for Cu(In,Ga)(S,Se)2 Thin-Film Solar Cells”, D. Hauschild, F. Meyer, A. Benkert‚ T. Dalibor, J. Palm, R.G. Wilks, M. Bär, M. Blum, W. Yang, F. Reinert, C. Heske, and L. Weinhardt, Proc. WCPEC-7/IEEE PVSC 2018.
  2. „Microcrystalline silicon oxides for silicon-based solar cells: Impact of the O/Si ratio on the electronic structure”, M. Bär, D.E. Starr, A. Lambertz, B. Holländer, J.-H. Alsmeier, L. Weinhardt, M. Blum, M. Gorgoi, W. Yang, R.G. Wilks, and C. Heske, Thin Films for Solar and Energy Technology VI, edited by Louay A. Eldada, Michael J. Heben, Proc. of SPIE Vol. 9177, p. 91770E.
  3. „X-ray Spectroscopic Analysis of the Growth of CBD-CdS Buffers on flexible Cu(In,Ga)Se2 Thin-Film Solar Cell Structures”, R.G. Wilks, R. Caballero, X. Song, R. Félix, A. Benkert, D. Gerlach, L. Weinhardt, M. Blum, W. Yang, C.A. Kaufmann, C. Heske, H.-W. Schock, and M. Bär, Proceedings 38th IEEE PVSC, Austin, TX, June 3-8, 2012.
  4. „Characterization of Vacuum Chamber Samples for Superconducting Insertion Devices”, D. Saez de Jauregui, T. Baumbach, S. Casalbuoni, A. Grau, S. Gerstl, M. Hagelstein, C. Heske, T. Holubek, B. Krause, A. Seiler, S. Stankov, L. Weinhardt, C. Boffo, C. Antoine, and Y. Boudigou, Proceedings 2012 IEEE International Particle Accelerator Conference (IPAC), New Orleans, May 21-25, 2012, p. 723-725.
  5. „Recent Progress with Superconducting Undulators at ANKA”, S. Casalbuoni, T. Baumbach, S. Gerstl, A. Grau, M. Hagelstein, C. Heske, T. Holubek, D. Saez de Jauregui, C. Boffo, and W. Walter, Proceedings ICFA Workshop on Future Light Sources, Thomas Jefferson National Accelerator Facility, Newport News, VA, March 5-9, 2012.
  6. „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 37th IEEE PVSC, Seattle, WA, June 20-24, 2011.
  7. „CdCl2 activation-induced chemical interaction at the CdTe/ZnO1-XSX 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 37th IEEE PVSC, Seattle, WA, June 20-24, 2011.
  8. „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. Mater. Res. Soc. Symp. Proc., Vol. 1324, mrss11-1324-d15-19. (DOI:10.1557/opl.2011.842)
  9. „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).
  10. ‘‘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 35th IEEE PVSC, Honolulu, HI, June 21-25, 2010, p. 24-27. ‘‘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 35th IEEE PVSC, Honolulu, HI, June 21-25, 2010, p. 646-649. ISBN: 978-1-4244-5892-9, DOI: 10.1109/PVSC.2010.5616878.
  11. „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).
  12. „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 34th IEEE PVSC, Philadelphia, PA, June 2009, p. 1060-1063.
  13. „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 34th IEEE PVSC, Philadelphia, PA, June 2009, p. 2107-2110.
  14. „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).
  15. „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.
  16. „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. 33rd 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.
  17. „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.
  18. „ALS UEC 2006 Review“, C. Heske, Advanced Light Source Activity Report, LBNL-62841, July 2007.
  19. „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.
  20. „Soft X-ray Liquid-Flow Cell at Beamline 8.0.1.“, Facility Report, Scientific Support, Advanced Light Source Activity Report, LBNL-55917, June 2006.
  21. „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.
  22. “Interface chemistry between the sputter-ZnxMg1-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. 21st European Photovoltaic Solar Energy Conference (EPSEC), Dresden, Germany, September 2006.
  23. „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 4th World Conference on Photovoltaic Energy Conversion (WCPEC), Waikoloa, Hawaii, May 2006, p. 412-415.
  24. „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 4th World Conference on Photovoltaic Energy Conversion (WCPEC), Waikoloa, Hawaii, May 2006, p. 416-419.
  25. „XES of a liquid/solid interface through a 100 nm Si3N4window“, 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.
  26. „- 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.
  27. „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.
  28. „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.
  29. „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 14th 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.
  30. „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.
  31. „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.
  32. „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.
  33. „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.
  34. „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.
  35. „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.
  36. „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.
  37. „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.
  38. „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.
  39. „Studying buried interfaces with soft x-ray spectroscopy“, C. Heske, Synchrotron Radiation in Natural Sciences 2, 35 (2003).
  40. „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.
  41. „Near edge X-ray absorption fine structure of thin perylene films deposited on Al2O3/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.
  42. „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.
  43. „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.
  44. „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.
  45. „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.
  46. „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.
  47. „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.
  48. „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.
  49. „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.
  50. „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.
  51. „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.
  52. „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.
  53. „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.
  54. „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.
  55. „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.
  56. „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.
  57. „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.
  58. „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.
  59. „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.
  60. „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.
  61. „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.
  62. „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.
  63. „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.
  64. „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.
  65. „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.
  66. „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.
  67. „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.
  68. „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.
  69. „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.
  70. „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.
  71. „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.
  72. „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.
  73. „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.
  74. „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.
  75. “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.
  76. „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.
  77. „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.
  78. „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.
  79. „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.
  80. „Recent achievements of the PISAM project“, M. Weiß , R. Fink, C. Heske, P. Väterlein, and E. Umbach, BESSY Jahresbericht 1994, p. 462.

 

Conference Proceedings (as editor), Books, Book Chapters

 

  1. "Spectroscopy of Energy Materials", C. Heske and W. Eberhardt (editors), J. El. Spec. Rel. Phenom. 190 Part A, 1-124 (2013).
  2. "Compound Semiconductors: Thin-Film Photovoltaics, LEDs, and Smart Energy Controls", Materials Research Society Symposium Proceedings, Volume 1538, M. Al-Jassim, C. Heske, T. Li, M. Mastro, C. Nan, S. Niki, W. Shafarman, S. Siebentritt, and Q. Wang (editors), Cambridge University Press, 2013 (ISBN 978-1-60511-515-3).
  3. Contributing author to "Photoelectrochemical Water Splitting – Standards, Experimental Methods, and Protocols", Zhebo Chen, Huyen N. Dinh, and Eric Miller, Springer Briefs in Energy, 2013.
  4. "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.
  5. "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).
  6. "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).
  7. "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).
  8. "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).

 

Patents

 

  1. “Method for treating exposed semiconductor surface for incorporating into photoelectrochemical cell, involves implanting nitrogen ions in exposed semiconductor surface, and depositing ruthenium alloy on exposed semiconductor surface”, United States Patent US20140332374-A1, Applicant: Alliance for Sustainable Energy, LLC, Golden, CO (US). Inventors: Todd DEUTSCH, Westminster, CO (US); John TURNER, Broomfield, CO (US); Jennifer LEISCH, Washington, DC (US); Heli WANG, Littleton, CO (US); Adam WELCH, Lakewood, CO (US); Avery LINDEMAN, Berkeley, CA (US); Kevin O'NEILL, Boulder, CO (US); Andrew PINKARD, Vista, CA (US); Arrelaine DAMERON, Boulder, CO (US); Clemens HESKE, Las Vegas, NV (US); Kyle GEORGE, Las Vegas, NV (US); Lothar WEINHARDT, Karlsruhe (DE); Michael WEIR, Las Vegas, NV (US), Assignee: Alliance for Sustainable Energy, LLC, Golden, CO (US). Derwent Primary Accession Number: 2014-U35261 [77].