Publications

2024

• Cs-Doped and Cs-S Co-Doped CuI p-Type Transparent Semiconductors with Enhanced Conductivity
  
  Adeem S. Mirza, Badri Vishal, Pia Dally, Claudia S. Schnohr, Stefaan De Wolf, Monica Morales-Masis
  Adv. Funct. Mater. 2024, 2316144

2023

• Peculiar bond length dependence in (Ag,Cu)GaSe2 alloys and its impact on the bandgap bowing
  
  Hans H. Falk; Stefanie Eckner; Michael Seifert; Konrad Ritter; Sergiu Levcenko; Timo Pfeiffelmann; Edmund Welter; Silvana Botti; William N. Shafarman; Claudia S. Schnohr
  APL Mater. 11, 111105 (2023)

• Atomic scale structure and bond stretching force constants in stoichiometric and off-stoichiometric kesterites
  
  Konrad Ritter, Galina Gurieva, Stefanie Eckner, Rene Schwiddessen, Francesco d’Acapito, Edmund Welter, Susan Schorr and Claudia S. Schnohr
  J. Chem. Phys. 159, 154705 (2023)

• Oxygen-induced phase separation in sputtered Cu-Sn-I-O thin films
  
  E. M. Zollner, S. Selle, C. Yang, K. Ritter, S. Eckner, E. Welter, M. Grundmann, C. S. Schnohr
  Phys. Status Solidi A, 2200646/1-10 (2023)

• Optical properties of AgxCu1–xI alloy thin films
  
  Evgeny Krüger, Michael Seifert, Volker Gottschalch, Harald Krautscheid, Claudia S. Schnohr, Silvana Botti, Marius Grundmann, Chris Sturm
  AIP Advances 13, 035117 (2023)

• Elucidating the local structure of V substitutes in In2S3 as potential intermediate band material by x-ray absorption spectroscopy and first principles calculations
  
  Elaheh Ghorbani, Martin Schiller, Hans H Falk, Leonard A Wägele, Stefanie Eckner, Francesco d'Acapito, Roland Scheer, Karsten Albe und Claudia S Schnohr
  J. Phys. Energy, 5 035003 (2023)

2022

• High-resolution XEOL spectroscopy setup at the X-ray absorption spectroscopy beamline P65 of PETRA III
  
  Sergiu Levcenco, Regina Biller, Timo Pfeiffelmann, Konrad Ritter, Hans H. Falk, Taowen Wang, Susanne Siebentritt, Edmund Welter, Claudia S. Schnohr
  Journal of Synchrotron Radiation 29, 1209-1215 (2022)

2021

• Atomic Scale Structure of (Ag,Cu)2ZnSnSe4 and Cu2Zn(Sn,Ge)Se4 Kesterite Thin Films
  
  Konrad Ritter, Galina Gurieva, Stefanie Eckner, Cora Preiß, Maurizio Ritzer, Charles J. Hages, Edmund Welter, Rakesh Agrawal, Susan Schorr, Claudia S. Schnohr
  Frontiers in Energy Research 9, 656006 (2021)

• Insights into interface and bulk defects in a high efficiency kesterite-based device
  
  Robert Fonoll-Rubio, Jacob Andrade-Arvizu, Javier Blanco-Portals, Ignacio Becerril-Romero, Maxim Guc, Edgardo Saucedo, Francesca Peiró, Lorenzo Calvo-Barrio, Maurizio Ritzer, Claudia S. Schnohr, Marcel Placidi, Sònia Estradé, Victor Izquierdo-Roca, Alejandro Pérez-Rodríguez
  Energy & Environmental Science 14, 507-523 (2021)

2020

• Cu/Zn disorder in stoichiometric Cu2ZnSn(S1-xSex)4 semiconductors: A complementary neutron and anomalous X-ray diffraction study 
  
  Galina Gurieva, Daniel M. Többens, Sergiu Levcenco, Thomas Unold, Susan Schorr 
  Journal of Alloys and Compounds 846, 156304 (2020)

• In-Operando Nanoscale X-ray Analysis Revealing the Local Electrical Properties of Rubidium-Enriched Grain Boundaries in Cu(In,Ga)Se2 Solar Cells
  
  Christian T. Plass, Maurizio Ritzer, Philipp Schöppe, Sven Schönherr, Maximilian Zapf, Martin Hafermann, Andreas Johannes, Gema Martínez-Criado, Jaime Segura-Ruiz, Roland Würz, Philip Jackson, Claudia S. Schnohr, Carsten Ronning
  ACS Applied Materials & Interfaces 12, 57117-57123 (2020)

• Interplay of Performance-Limiting Nanoscale Features in Cu2ZnSn(S,Se)4 Solar Cells
  
  Maurizio Ritzer, Sven Schönherr, Philipp Schöppe, Gerardo Larramona, Christophe Choné, Galina Gurieva, Andreas Johannes, Konrad Ritter, Gema Martínez-Criado, Susan Schorr, Carsten Ronning, Claudia S. Schnohr
  Physica Status Solidi A 217, 2000456 (2020)

• Atomic scale structure and its impact on the band gap energy for Cu2Zn(Sn,Ge)Se4 kesterite alloys
  
  Konrad Ritter, Stefanie Eckner, Cora Preiß, Galina Gurieva, Thomas Bischoff, Edmund Welter, Silvana Botti, Susan Schorr, Claudia S Schnohr
  Journal of Physics: Energy 2, 035004 (2020)

• On the Germanium Incorporation in Cu2ZnSnSe4 Kesterite Solar Cells Boosting Their Efficiency
  
  Maurizio Ritzer, Sven Schönherr, Philipp Schöppe, Wolfgang Wisniewski, Sergio Giraldo, Galina Gurieva, Andreas Johannes, Christian T. Plass, Konrad Ritter, Gema Martínez-Criado, Susan Schorr, Edgardo Saucedo, Carsten Ronning, Claudia S. Schnohr
  ACS Applied Energy Materials 3, 558-564 (2020)

• Revealing the origin of the beneficial effect of cesium in highly efficient Cu(In,Ga)Se2 solar cells
  
  Philipp Schöppe, Sven Schönherr, Manjusha Chugh, Hossein Mirhosseini, Philip Jackson, Roland Wuerz, Maurizio Ritzer, Andreas Johannes, Gema Martínez-Criado, Wolfgang Wisniewski, Torsten Schwarz, Christian T. Plass, Martin Hafermann, Thomas D. Kühne, Claudia S. Schnohr, Carsten Ronning
  Nano Energy 71, 104622 (2020)

• Point defects, compositional fluctuations, and secondary phases in non-stoichiometric kesterites
  
  Susan Schorr, Galina Gurieva, Maxim Guc, Mirjana Dimitrievska, Alejandro Pérez-Rodríguez, Victor Izquierdo-Roca, Claudia S Schnohr, Juran Kim, William Jo, José Manuel Merino
  Journal of Physics Energy 2, 012002 (2020)

2019

• Bond-stretching force constants and vibrational frequencies in ternary zinc-blende alloys: A systematic comparison of (In,Ga)P, (In,Ga)As and Zn(Se,Te)
  
  Stefanie Eckner, Andreas Johannes, Martin Gnauck, Helena Kämmer, Tobias Steinbach, Sven Schönherr, Roman Chernikov, Edmund Welter, Mark C. Ridgway, Claudia S. Schnohr
  Europhysics Letters 126, 36002 (2019)

• Short-range versus long-range structure in Cu(In,Ga)Se2, Cu(In,Ga)3Se5, and Cu(In,Ga)5Se8
  
  Erik Haubold, Philipp Schöppe, Stefanie Eckner, Sebastian Lehmann, Ivan Colantoni, Francesco d'Acapito, Francesco di Benedetto, Susan Schorr, Claudia S. Schnohr
  Journal of Alloys and Compounds 774, 803-812 (2019)

2018

• Overall Distribution of Rubidium in Highly Efficient Cu(In,Ga)Se2 Solar Cells
  
  Philipp Schöppe, Sven Schönherr, Wolfgang Wisniewski, Roland Wuerz, Wolfgang Wisniewski, Maurizio Ritzer, Maximilian Zapf, Andreas Johannes, Claudia S. Schnohr, Carsten Ronning
  ACS Applied Materials & Interfaces 10, 40592-40598 (2018)

• Reversible correlation between subnanoscale structure and Cu content in co-evaporated Cu(In,Ga)Se2 thin films
  
  Claudia S. Schnohr, Stefanie Eckner, Philipp Schöppe, Erik Haubold, Francesco d’Acapito, Dieter Greiner, Christian A. Kaufmann
  Acta Materialia 153, 8-14 (2018)

• Bond-strength inversion in (In,Ga)As semiconductor alloys
  
  Stefanie Eckner, Konrad Ritter, Philipp Schöppe, Erik Haubold, Erich Eckner, Jura Rensberg, Robert Röder, Mark C. Ridgway, and Claudia S. Schnohr
  Physical Review B 97, 195202/1-6 (2018)

2017

• Rubidium segregation at random grain boundaries in Cu(In,Ga)Se₂ absorbers
  
  Philipp Schöppe, Sven Schönherr, Roland Wuerz, Wolfgang Wisniewski, Gema Martínez-Criado, Maurizio Ritzer, Konrad Ritter, Carsten Ronning, Claudia S. Schnohr
  Nano Energy 42, 307-313 (2017)

• Discrepancy between integral and local composition in off-stoichiometric Cu2ZnSnSe4 kesterites: A pitfall for classification
  
  Philipp Schöppe, Galina Gurieva,  Sergio Giraldo, Gema Martínez-Criado, Carsten Ronning, Edgardo Saucedo, Susan Schorr, Claudia S. Schnohr
  Applied Physics Letters 110, 043901/1-5 (2017)

2016

• Ion-implantation-induced amorphization of InxGa1−xP alloys as functions of stoichiometry and temperature
  
  Zohair S. Hussain, Elke Wendler, Werner Wesch, Claudia S. Schnohr, Mark C. Ridgway
  Journal of Applied Physics 119, 195702/1-7 (2016)

2015

• Compound semiconductor alloys: From atomic-scale structure to bandgap bowing
  
  Claudia S. Schnohr
  Applied Physics Reviews 2, 031304/1-43 (2015)

• Composition-dependent nanostructure of Cu(In,Ga)Se2 powders and thin films
  
  C.S. Schnohr, H. Kämmer, T. Steinbach, M. Gnauck, T. Rissom, C.A. Kaufmann, C. Stephan, S. Schorr
  Thin Solid Films 582, 356-360 (2015)

• Improved Ga grading of sequentially produced Cu(In,Ga)Se2 solar cells studied by high resolution X-ray fluorescence
  
  Philipp Schöppe, Claudia S. Schnohr, Michael Oertel, Alexander Kusch, Andreas Johannes, Stefanie Eckner, Manfred Burghammer, Gema Martínez-Criado, Udo Reislöhner, Carsten Ronning
  Applied Physics Letters 106, 013909/1-4 (2015)

2014

• Local versus global electronic properties of chalcopyrite alloys: X-ray absorption spectroscopy and ab initio calculations
  
  Rafael Sarmiento-Pérez, Silvana Botti, Claudia S. Schnohr, Iver Lauermann, Angel Rubio, Benjamin Johnson
  Journal of Applied Physics 116, 093703/1-5 (2014)

• Temperature-Dependent Second Shell Interference in the First Shell Analysis of Crystalline InP X-ray Absorption Spectroscopy Data
  
  Claudia S. Schnohr, Leandro L. Araujo, Mark C. Ridgway
  Journal of the Physical Society of Japan 83, 094602/1-6 (2014)

• Nano-porosity in GaSb induced by swift heavy ion irradiation
  
  P. Kluth, J. Sullivan, W. Li, R. Weed, C. S. Schnohr, R. Giulian, L. L. Araujo, W. Lei, M. D. Rodriguez, B. Afra, T. Bierschenk, R. C. Ewing, and M. C. Ridgway
  Applied Physics Letters 104, 023105/1-4 (2014)

2013

• Transparent CdTe solar cells with a ZnO:Al back contact
  
  Christoph Heisler, Claudia S. Schnohr, Mathias Hädrich, Michael Oertel, Christian Kraft, Udo Reislöhner, Heinrich Metzner, Werner Wesch
  Thin Solid Films 548, 627-631 (2013)

• Atomic-scale structure, cation distribution, and bandgap bowing in Cu(In,Ga)S2 and Cu(In,Ga)Se2
  
  Stefanie Eckner, Helena Kämmer, Tobias Steinbach, Martin Gnauck, Andreas Johannes, Christiane Stephan, Susan Schorr, Claudia S. Schnohr
  Applied Physics Letters 103, 081905/1-4 (2013)

• Lift-off protocols for thin films for use in EXAFS experiments
  
  Stefan Decoster, Chris J. Glover, Bernt Johannessen, Raquel Giulian, David J. Sprouster, Patrick Kluth, Leandro L. Araujo, Zohair S. Hussain, Claudia Schnohr, Hazar Salama, Felipe Kremer, Kristiaan Temst, André Vantomme, Mark C. Ridgway
  Journal of Synchrotron Radiation 20, 426-432 (2013)

2012

• Structural and electronic contributions to the bandgap bowing of (In,Ga)P alloys
  
  Claudia S. Schnohr
  Journal of Physics: Condensed Matter 24, 325802/1-6 (2012)

• Atomic-scale structure and band-gap bowing in Cu(In,Ga)Se2
  
  C. S. Schnohr, H. Kämmer, C. Stephan, S. Schorr, T. Steinbach, J. Rensberg
  Physical Review B 85, 2452045/1-7 (2012)

• Structural properties of embedded Ge nanoparticles modified by swift heavy-ion irradiation
  
  L. L. Araujo, R. Giulian, D. J. Sprouster, C. S. Schnohr, D. J. Llewellyn, B. Johannessen, A. P. Byrne, M. C. Ridgway
  Physical Review B 85, 235417/1-11 (2012)

• Damage evolution and amorphization in semiconductors under ion irradiation
  
  W. Wesch, E. Wendler, C.S. Schnohr
  Nuclear Instruments and Methods B 277, 58-69 (2012)

• Ion-beam-induced damage formation in CdTe at a temperature of 15 K
  
  C.W. Rischau, C.S. Schnohr, E. Wendler, W. Wesch
  Nuclear Instruments and Methods B 272, 338-341 (2012)

2011

• Void formation in amorphous germanium due to high electronic energy deposition
  
  Konrad Gärtner, Julius Jöhrens, Tobias Steinbach, Claudia S. Schnohr, Mark C. Ridgway, Werner Wesch
  Physical Review B 83, 224106/1-9 (2011)

• Ion-beam-induced damage formation in CdTe
  
  Carl W. Rischau, Claudia S. Schnohr, Elke Wendler, Werner Wesch
  Journal of Applied Physics 109, 113531/1-12 (2011)

• Swift heavy ion irradiation of Pt nanocrystals: II. Structural changes and H desorption
  
  Raquel Giulian, Leandro L. Araujo, Patrick Kluth, David J. Sprouster, Claudia S. Schnohr, Aidan P. Byrne, Mark C. Ridgway
  Journal of Physics D: Applied Physics 44, 155402/1-7 (2011)

• Swift heavy ion irradiation of Pt nanocrystals: I. shape transformation and dissolution
  
  Raquel Giulian, Leandro L. Araujo, Patrick Kluth, David J. Sprouster, Claudia S. Schnohr, Aidan P. Byrne, Mark C. Ridgway
  Journal of Physics D: Applied Physics 44, 155401/1-7 (2011)

• Influence of electronic energy deposition on the structural modification of swift heavy-ion-irradiated amorphous germanium layers
  
  Tobias Steinbach, Claudia S. Schnohr, Patrick Kluth, Raquel Giulian, Leandro L. Araujo, David J. Sprouster, Mark C. Ridgway, Werner Wesch
  Physical Review B 83, 054113/1-8 (2011)

2010

• Swift-heavy-ion-induced damage formation in III-V binary and ternary semiconductors
  
  Claudia S. Schnohr, Patrick Kluth, Raquel Giulian, David J. Llewellyn, Aidan P. Byrne, David J. Cookson, Mark C. Ridgway
  Physical Review B 81, 075201/1-9 (2010)

2009

• fcc-hcp phase transformation in Co nanoparticles induced by swift heavy-ion irradiation
  
  David J. Sprouster, Raquel Giulian, Claudia S. Schnohr, Leandro L. Araujo, Patrick Kluth, Aidan P. Byrne, Garry J. Foran, Bernt Johannessen, Mark C. Ridgway
  Physical Review B 80, 115438/1-5 (2009)

• Anisotropic vibrations in crystalline and amorphous InP
  
  Claudia S. Schnohr, Patrick Kluth, Leandro L. Araujo, David J. Sprouster, Aidan P. Byrne, Garry J. Foran, Mark C. Ridgway
  Physical Review B 79, 195203/1-10 (2009)

• Structural modification of swift heavy ion irradiated amorphous Ge layers
  
  Werner Wesch, Claudia S. Schnohr, Patrick Kluth, Zohair S. Hussain, Leandro L. Araujo, Raquel Giulian, David J. Sprouster, Aidan P. Byrne, Mark C. Ridgway
  Journal of Physics D: Applied Physics 42, 115402/1-5 (2009)

• Temperature-dependent EXAFS analysis of embedded Pt nanocrystals
  
  Raquel Giulian, Leandro L. Araujo, Patrick Kluth, David J. Sprouster, Claudia S. Schnohr, Garry J. Foran, Mark C. Ridgway
  Journal of Physics: Condensed Matter 21, 155302/1-6 (2009)

• Changes in metal nanoparticle shape and size induced by swift heavy-ion irradiation
  
  Mark C. Ridgway, Patrick Kluth, Raquel Giulian, David J. Sprouster, Leandro L. Araujo, Claudia S. Schnohr, David J. Llewellyn, Aidan P. Byrne, Garry J. Foran, David J. Cookson
  Nuclear Instruments Methods B 267, 931-935 (2009)

• Energy dependent saturation width of swift heavy ion shaped embedded Au nanoparticles
  
  Patrick Kluth, Raquel Giulian, David J. Sprouster, Claudia S. Schnohr, Aidan P. Byrne, David J. Cookson, Mark C. Ridgway
  Applied Physics Letters 94, 113107/1-3 (2009)

• Rapid ion-implantation-induced amorphization of InxGa1−xAs relative to InAs and GaAs
  
  Zohair S. Hussain, Elke Wendler, Werner Wesch, Garry J. Foran, Claudia S. Schnohr, David J. Llewellyn, Mark C. Ridgway
  Physical Review B 79, 085202/1-6 (2009)

• The influence of annealing conditions on the growth and structure of embedded Pt nanocrystals
  
  Raquel Giulian, Leandro L. Araujo, Patrick Kluth, David J. Sprouster, Claudia S. Schnohr, Bernt Johannessen, Garry J. Foran, Mark C. Ridgway
  Journal of Applied Physics 105, 044303/1-8 (2009)

2008

• Fine Structure in Swift Heavy Ion Tracks in Amorphous SiO₂
  
  Patrick Kluth, Claudia S. Schnohr, Olli H. Pakarinen, Flyura Djurabekova, David J. Sprouster, Raquel Giulian, Mark C. Ridgway, Aidan P. Byrne, Christina Trautmann, David J. Cookson, Kai Nordlund, Marcel Toulemonde
  Physical Review Letters 101, 175503/1-4 (2008)

• Atomic-scale structure of Ga_1−xIn_xP alloys measured with extended x-ray absorption fine structure spectroscopy
  
  Claudia S. Schnohr, Leandro L. Araujo, Patrick Kluth, David J. Sprouster, Garry J. Foran, Mark C. Ridgway
  Physical Review B 78, 115201/1-8 (2008)

• Size-dependent characterization of embedded Ge nanocrystals: Structural and thermal properties
  
  Leandro L. Araujo, Raquel Giulian, David J. Sprouster, Claudia S. Schnohr, David J. Llewellyn, Patrick Kluth, David J. Cookson, Garry J. Foran, Mark C. Ridgway
  Physical Review B 78, 094112/1-15 (2008)

• Measurement of latent tracks in amorphous SiO₂ using small angle X-ray scattering
  
  Patrick Kluth, Claudia S. Schnohr, David J. Sprouster, Aidan P. Byrne, David J. Cookson, Mark C. Ridgway
  Nuclear Instruments Methods B 266, 2994-2997 (2008)

• Comparison of the atomic structure of InP amorphized by electronic or nuclear ion energy-loss processes
  
  Claudia S. Schnohr, Patrick Kluth, Aidan P. Byrne, Garry J. Foran, Mark C. Ridgway
  Physical Review B 77, 073204/1-4 (2008)

2007

• Ion irradiation effects on metallic nanocrystals
  
  Patrick Kluth, Bernt Johannessen, Raquel Giulian, Claudia S. Schnohr, Garry J. Foran, David J. Cookson, Aidan P. Byrne, Mark C. Ridgway
  Radiation Effects and Defects in Solids 162, 501-513 (2007)

• EXAFS study of the amorphous phase of InP after swift heavy ion irradiation
  
  Claudia S. Schnohr, Patrick Kluth, Aidan P. Byrne, Garry J. Foran, Mark C. Ridgway
  Nuclear Instruments and Methods B 257, 293-296 (2007)

• Room temperature annealing of low-temperature ion implanted sapphire
  
  Claudia S. Schnohr, Elke Wendler, Werner Wesch
  Nuclear Instruments and Methods B 257, 492-495 (2007)

2006

• Ion-beam induced effects at 15 K in a-Al2O3 of different orientations
  
  Claudia S. Schnohr, Elke Wendler, Konrad Gärtner, Werner Wesch, Klaus Ellmer
  Journal of Applied Physics 99, 123511/1-10 (2006)

• Ion-beam induced effects in A-Al2O3 at 15 K
  
  Claudia S. Schnohr, Elke Wendler, Konrad Gärtner, Klaus Ellmer, Werner Wesch
  Nuclear Instruments and Methods B 250, 85-89 (2006)