Martin Luther University Halle-Wittenberg

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2021


Antonio Cabas-Vidani, Leo Choubrac, José A. Márquez, Thomas Unold, Matthias Maiberg, Roland Scheer, Hu Li, Klaus Leifer, Robin Pauer, Evgeniia Gilshtein, Ayodhya N. Tiwari, and Yaroslav E. Romanyuk
Influence of the Rear Interface on Composition and Photoluminescence Yield of CZTSSe Absorbers: A Case for an Al2O3 Intermediate Layery
ACS Appl. Mater. Interfaces 2021, 13, 16, 19487–19496
https://doi.org/10.1021/acsami.1c02437

2020

I. Becerril-Romero, D. Sylla, M. Placidi, Y.  Sánchez, J. Andrade-Arvizu, V. Izquierdo-Roca, M. Guc, A. Pérez-Rodríguez, S. Grini, L. Vines, B. Pusay, R. Almache, J. Puigdollers, P. Pistor, E. Saucedo, M. Espíndola-Rodríguez
Transition-Metal Oxides for Kesterite Solar Cells Developed on Transparent Substrates
ACS Applied Materials and Interfaces 12, 33656-33669 (2020)
DOI: 10.1021/acsami.0c06992

T. Burwig, M. Guc, V. Izquierdo-Roca, P. Pistor
Synthesis and Crystal Structure Evolution of Co-Evaporated Cs2AgBiBr6 Thin Films upon Thermal Treatment

Journal of Physical Chemistry C 124, 9249-9255 (2020)
DOI: 10.1021/acs.jpcc.0c02480

T. Jawinski, M. Lorenz, R. Scheer, M. Grundmann, H. v. Wenckstern
Properties of epitaxially grown In2S3:V thin films for intermediate band solar cell application
47th IEEE Photovoltaic Specialists Conference, 2663-2666 (2020)
DOI: 10.1109/PVSC45281.2020.9300369

M. Krause, A. Nikolaeva, M. Maiberg, P. Jackson, D. Hariskos, W. Witte, J. A. Márquez, S. Levcenko, T. Unold, R. Scheer, D. Abou-Ras
Microscopic origins of performance losses in highly efficient Cu(In,Ga)Se2 thin-film solar cells
Nature Communications 11, 4189 (2020)
DOI: 10.1038/s41467-020-17507-8

P. Pistor, M. Meyns, M. Guc, H.-C. Wang, M. A. Marques, X. Alcobé, A. Cabot, V. Izquierdo-Roca
Advanced Raman spectroscopy of Cs2AgBiBr6 double perovskites and identification of Cs3Bi2Br9 secondary phases
Scripta Materialia 184, 24-29 (2020)
DOI: 10.1016/j.scriptamat.2020.03.040

T. Schneider, T. Hölscher, H. Kempa, R. Scheer
Determination of the back contact recombination velocity of a Cu(In,Ga)Se2/ITO interface using bifacial solar cells
37th European Photovoltaic Solar Energy Conference, 621-626 (2020)
DOI: 10.4229/EUPVSEC20202020-3CO.7.6

T. Schneider, J. Tröndle, B. Fuhrmann, F. Syrowatka, A. Sprafke, R. Scheer
Ultrathin CIGSe Solar Cells with Integrated Structured Back Reflector
Solar RRL 4, 2000295 (2020)
DOI: 10.1002/solr.202000295

J. Seeger, F. Wilhelmi, J. Schundelmeier, S. Zahedi-Azad, R. Scheer, K. Schmidt, H. Kalt, M. Hetterich
Cross-sectional Kelvin probe force microscopy on Cu(In,Ga)Se2 solar cells: Influence of RbF and KF post-deposition treatment on the surface potential of the absorber layer
Applied Physics Letters 117, 243901 (2020)
DOI: 10.1063/5.0032371

S. Zahedi-Azad, M. Maiberg, R. Scheer
Effect of NA-PDT and KF-PDT on the photovoltaic peformance of wide bandgap Cu(In,Ga)Se2 solar cells
Progress in Photovoltaics: Research and Applications 28, 1146-1157 (2020)
DOI: 10.1002/pip.3317

Y. Zhang, J. Ge, B. Mahmoudi, S. Förster, F. Syrowatka, A. W. Maijenburg, R. Scheer
Synthesis and Characterization of Spinel Cobaltite (Co3O4) Thin Films for Function as Hole Transport Materials in Organometallic Halide Perovskite Solar Cells
ACS Applied Energy Materials 3, 3755-3769 (2020)
DOI: 10.1021/acsaem.0c00230

2019

D. Abou-Ras, A. Nikolaeva, S. C. Davila, M. Krause, H. Guthrey, M. Al-Jassim, M. Morawski, R. Scheer
No Evidence for Passivation Effects of Na and K at Grain Boundaries in Polycrystalline Cu(In,Ga)Se2 Thin Films for Solar Cells
SOLAR RRL 3, 1900095 (2019)
DOI: 10.1002/solr.201900095

T. Burwig, K. Heinze, V. Naumann, A. Hähnel, S. Lange, C. Hagendorf, R. Scheer, P. Pistor
Co-Evaporated Cs2AgBiBr6 Double Perovskites for Solar Cells
36th European Photovoltaic Solar Energy Conference and Exhibition, 728-732 (2019)
DOI: 10.4229/EUPVSEC20192019-3BV.2.11

J. Ge, T. Schneider, Y. Zhang, P. Pistor, R. Scheer
Recent Progress in Our Perovskite-CIGS Tandem Solar Devices
36th European Photovoltaic Solar Energy Conference and Exhibition, 733-734 (2019)
DOI: 10.4229/EUPVSEC20192019-3BV.2.13

M. Grossberg, J. Krustok, C. J. Hages, D. M. Bishop, O. Gunawan, R. Scheer, S. M. Lyam, H. Hempel, S. Levcenco, T. Unold
The electrical and optical properties of kesterites
Journal of Physics: Energy 1, 044002 (2019)
DOI: 10.1088/2515-7655/ab29a0

M. Guc, F. Oliva, R. Kondrotas, X. Alcobe, M. Placidi, P. Pistor, E. Saucedo, A. Perez-Rodriguez, A. Izquierdo-Roca
CuZnInSe3‐based solar cells: Impact of copper concentration on vibrational and structural properties and device performance
Progress in Photovoltaics: Research and Applications 27, 716723 (2019)
DOI: 10.1002/pip.3150

T. Hölscher, T. Walter, T. Schneider, M. Maiberg, R. Scheer
Device simulation of Cu(In,Ga)Se2 solar cells by means of voltage dependent admittance spectroscopy
Thin Solid Films 669, 345-350 (2019)
DOI: 10.1016 /j.tsf.2018. 11.022

M. Morawski, M. Maiberg, R. Scheer
Influence of Sodium on the Non-Radiative Recombination in Copper Indium Gallium Diselenide Solar Cells
36th European Photovoltaic Solar Energy Conference and Exhibition, 601-603 (2019)
DOI: 10.4229/EUPVSEC20192019-3AO.8.4

Y. E. Romanyuk, S. G. Haass, S. Giraldo, M. Placidi, D. Tiwari, D. J. Fermin, X. Hao, H. Xin, T. Schnabel, M. Kauk-Kuusik, P. Pistor, S. Lie, L. H. Wong
Doping and alloying of kesterites
Journal of Physics: Energy 1, 044004 (2019)
DOI: 10.1088/2515-7655/ab23bc

T. Schneider, R. Scheer
Aluminum Based Back Reflectors for Ultrathin Cu(In,Ga)Se2 Solar Cells with ITO Diffusion Barrier
36th European Photovoltaic Solar Energy Conference and Exhibition, 684-688 (2019)
DOI: 10.4229/EUPVSEC20192019-3BV.1.44

H. Stange, S. Brunken, D. Greiner, M. D. Heinemann, D. A. B. Yani, L. A. Wägele, C. Li, E. S. Sanli, M. Kahnt, S. S. Schmidt, J. P.  Backer, C. A. Kaufmann, M. Klaus, R. Scheer, C. Genzel, R. Mainz
Stacking fault reduction during annealing in Cu-poor CuInSe2 thin film solar cell absorbers analyzed by in situ XRD and grain growth modeling
Journal of Applied Physics 125, 035303 (2019)
DOI: 10.1063/1.5052245

H. C. Wang, P. Pistor, M. A. L. Marques, S. Botti
Double perovskites as p-type conducting transparent semiconductors: a high-throughput search
Journal of Materials Chemistry A 7, 14705-14711 (2019)
DOI: 10.1039/c9ta01456j

W.-J. Yin , B. Weng, J. Ge, Q. Sun , Z. Li, Y. Yan
Oxide perovskites, double perovskites and derivatives for electrocatalysis, photocatalysis, and photovoltaics
Energy Environmental Science 12, 442-462 (2019)
DOI: 10.1039/C8EE01574K

S. Zahedi-Azad, M. Maiberg, R. Clausing, R. Scheer
Influence of heavy alkali post deposition treatment on wide gap Cu(In,Ga)Se2
Thin Solid Films 669, 629-632 (2019)
DOI: 10.1016/j.tsf.2018.11.041

2018

I. Becerril-Romero, L. Acebo, F. Oliva, V. Izquierdo-Roca, S. López-Marino, M. Espíndola-Rodríguez, M. Neuschitzer, Y. Sánchez, M. Placidi, A. Pérez-Rodríguez, E. Saucedo, P. Pistor
CZTSe solar cells developed on polymer substrates: Effects of low-temperature processing
Progress in Photovoltaics: Research and Applications 26, 55-68 (2018)
DOI: 10.1002/pip.2945

T. Burwig, W. Fränzel, P. Pistor
Crystal Phases and Thermal Stability of Co-evaporated CsPbX3 (X = I, Br) Thin Films
Journal of Physical Chemistry Letters 9, 4808-4813 (2018)
DOI: 10.1021/acs.jpclett.8b02059

S. Giraldo, E. Saucedo, M. Neuschitzer, F. Oliva, M. Placidi, X. Alcobe, V. Izquierdo-Roca, S. Kim, H. Tampo, H. Shibata, A. Perez-Rodriguez, P. Pistor
How small amounts of Ge modify the formation pathways and crystallization of kesterites
Energy and Environmental Science 11, 582-593 (2018)
DOI: 10.1039/C7EE02318A

A. Hernández-Martnez, M. Placidi, L. Arqués, S. Giraldo, Y. Sánchez, V. Izquierdo-Roca, P. Pistor, M. Valentini, C. Malerba, E. Saucedo
Insights into the Formation Pathways of Cu2ZnSnSe4 Using Rapid Thermal Processes
ACS Applied Energy Materials 1, 1981-1989 (2018)
DOI: 10.1021/acsaem.8b00089

T. Hölscher, T. Schneider, M. Maiberg, R. Scheer
Critical role of air-light exposure on co-evaporated Cu(In,Ga)Se2 solar cells
Japanese Journal of Applied Physics 57, 08RC07 (2018)
DOI: 10.7567/Jjap.57.08rc07

T. Hölscher, T. Schneider, M. Maiberg, R. Scheer
Impact of air-light exposure on the electrical properties of Cu(In,Ga)Se2 solar cells
Progress in Photovoltaics: Research and Applications 26, 934-941 (2018)
DOI: 10.1002/pip.3041

P. Pistor, T.  Burwig, C. Brzuska, B. Weber, W. Fränzel
Thermal  stability and miscibility of co-evaporated methyl ammonium lead halide  (MAPbX3, X = I, Br, Cl) thin films analysed by in situ X-ray diffraction
Journal of Materials Chemistry 6, 1149-11506 (2018)
DOI: 10.1039/C8TA02775G

T. Hölscher, T. Walter, T. Schneider, M. Maiberg, R. Scheer
Device simulation of Cu(In,Ga)Se2 solar cells by means of voltage dependent admittance spectroscopy
Thin Solid Films 669, 345-350 (2019)
DOI: 10.1016/j.tsf.2018.11.022

R. Kondrotas, F. Oliva, X. Alcobe, V. Izquierdo-Roca, A. Perez-Rodriguez, E. Saucedo, P. Pistor
Double band gap gradients in sequentially processed photovoltaic absorbers from the Cu(In,Ga)Se2-ZnSe pseudobinary system
Progress in Photovoltaics: Research and Applications 26, 135-144 (2018)
DOI: 10.1002/pip.2958

2017

D. Abou-Ras, S. Wagner, B. J. Stanbery, H.-W. Schock, R. Scheer, L. Stolt, S. Siebentritt, D. Lincot, C. Eberspacher, K. Kushiya, A. N. Tiwari
Innovation highway: Breakthrough milestones and key developments in chalcopyrite photovoltaics from a retrospective viewpoint
Thin Solid Films 633, 2-12 (2017)
DOI: 10.1016/j.tsf.2017.01.005

E. Jarzembowski, B. Fuhrmann, H. Leipner, W. Fränzel, R. Scheer
Ultrathin Cu(In,Ga)Se2 solar cells with point-like back contact in experiment and simulation
Thin Solid Films 633, 61-65 (2017)
DOI: 10.1016/j.tsf.2016.11.003

M. Maiberg, F. Bertram, M. Müller, R. Scheer
Theoretical study of time-resolved luminescence in semiconductors. IV. Lateral inhomogeneities
Journal of Applied Physics 121, 085703 (2017)
DOI: 10.1063/1.4976102

M. Maiberg, T. Hölscher, E. Jarzembowski, S. Hartnauer, S. Zahedi-Azad, W. Fränzel, R. Scheer
Verification of minority traps in Cu(In,Ga)Se2 and Cu2ZnSnSe4 by means of time-resolved photoluminescence
Thin Solid Films 633, 208-212 (2017)
DOI: 10.1016/j.tsf.2017.02.002

T. Hölscher, S. Förster, T. Schneider, M. Maiberg, W. Widdra, R. Scheer
Light induced degradation of Cu(In,Ga)Se2 thin film surfaces
Applied Physics Letters 111, 011604 (2017)
DOI: 10.1063/1.4992116

L. A. Wägele, D. Rata, G. Gurieva, R. Scheer
Structural analysis of co-evaporated In2S3 and In2S3:V for solar cell absorber applications
Physica Status Solidi C 14, 1600204 (2017)
DOI: 10.1002/pssc.201600204

S. Zahedi-Azad, R. Scheer
Quenching interface recombination in wide bandgap Cu(In,Ga)Se2 by potassium treatment
Physica Status Solidi C 14, 1600203 (2017)
DOI: 10.1002/pssc.201600203

2016

S. Hartnauer, L. Körbel, M. A. Marques, S. Botti, P. Pistor, R. Scheer
Research Update: Stable single-phase Zn-rich Cu2ZnSnSe4 through In doping
APL Materials 4, 070701 (2016)
10.1063/1.4953435

A. Uedono, M. M. Islam, T.  Sakurai, C. Hugenschmidt, W. Egger, R. Scheer, R. Krause-Rehberg, K. Akimoto
Vacancy behavior in Cu(In1-xGax)Se2 layers grown by a three-stage coevaporation process probed by monoenergetic positron beams
Thin Solid Films 603, 418-423 (2016)
DOI: 10.1016/j.tsf.2016.02.057

S. Zahedi-Azad, E. Jarzembowski, S. Hartnauer, L. Wägele, D. Greiner, R. Scheer
Monitoring the phase evolution of Cu(In,Ga)Se2 by different Se flux via in-situ XRD
Physica Status Solidi A 213, 2169-2175 (2016)
DOI: 10.1002/pssa.201532991

2015

J. Borchert, H. Boht, W. Franzel, R. Csuk, R. Scheer, P. Pistor
Structural investigation of co-evaporated methyl ammonium lead halide perovskite films during growth and thermal decomposition using different PbX2 (X = I, Cl) precursors
Journal of Materials Chemistry A 3,19842-19849 (2015)
DOI: 10.1039/C5TA04944J

S. Hartnauer, L. A. Wägele, E. Jarzembowski, R. Scheer
In-situ XRD study of alloyed Cu2ZnSnSe4-CuInSe2 thin films for solar cells
Thin Solid Films 582, 272 (2015)
DOI: 10.1016/j.tsf.2014.11.061

S. Hartnauer, L. A. Wägele, F. Syrowatka, G. Kaune, R. Scheer
Co-evaporation process study of Cu2ZnSnSe4 thin films by in situ light scattering and in situ X-ray diffraction
Physica Status Solidi A 212, 356-363 (2015)
DOI: 10.1002/pssa.201431497

E. Jarzembowski, M. Maiberg, F. Obereigner, K. Kaufmann, S. Krause, R. Scheer
Optical and electrical characterization of Cu(In,Ga)Se
2 thin film solar cells with varied absorber layer thickness
Thin Solid Films 576, 75-80 (2015)
DOI: 10.1016/j.tsf.2015.01.004

E. Jarzembowski, F. Syrowatka, K. Kaufmann, W. Fränzel, T. Hölscher, R. Scheer
The influence of sodium on the molybdenum/Cu(In,Ga)Se
2 interface recombination velocity, determined by time resolved photoluminescence
Applied Physics Letters 107, 051601 (2015)
DOI:
10.1063/1.4928187

M. Maiberg, T. Hölscher, S. Zahedi-Azad, W. Fränzel, R. Scheer
Investigation of long lifetimes in Cu(In,Ga)Se2 by time-resolved photoluminescence
Applied Physics Letters 102, 122104 (2015)
DOI: 10.1063/1.4931632

M. Maiberg, T. Hölscher, S. Zahedi-Azad, R. Scheer
Theoretical study of time-resolved luminescence in semiconductors. III. Trap states in the band gap
Journal of Applied Physics 118, 105701 (2015)
DOI: 10.1063/1.4929877

M. Maiberg, C. Spindler, E. Jarzembowski, R. Scheer
Electrical characterization of Cu(In,Ga)Se2-solar cells by voltage dependent time-resolved photoluminescence
Thin Solid Films 582, 379 (2015)
DOI: 10.1016/j.tsf.2014.09.022

F. Obereigner, N. Barreau, W. Witte, R. Scheer
Open-circuit and doping transients of Cu(In,Ga)Se2 solar cells with varying Ga content
Journal of Applied Physics 117, 055704 (2015)
DOI: 10.1063/1.4931935

P. Pistor, S. Zahedi-Azad, S. Hartnauer, L. A. Wägele, E. Jarzembowski, R. Scheer
Real time observation of phase formations by XRD during Ga-rich or In-rich Cu(In,Ga)Se2 growth by co-evaporation
Physica Status Solidi A 212, 1897-1904 (2015)
DOI: 10.1002/pssa.201431949

2014

G. Kaune, S. Hartnauer, P. Syrowatka, R. Scheer
Phase formation in Cu2ZnSnSe4 thin films deposited with multi-stage co-evaporation processes
Solar Energy Materials and Solar Cells 120, 596-602 (2014)
DOI: 10.1016/j.solmat.2013.09.043

G. Kaune, S. Hartnauer, R. Scheer
In situ XRD investigation of Cu2ZnSnSe4 thin film growth by thermal co-evapoation
Physica Status Solidi A, 211, 1991-1996 (2014)
DOI: 10.1002/pssa.201330340

J. Kavalakkatt, D. Abou-Ras, J. Haarstrich, C. Ronning, M. Nichterwitz, R. Caballero, T. Rissom, T. Unold, R. Scheer, H. W. Schock
Electron-beam-induced current at absorber back surfaces of Cu (In,Ga)Se2 thin-film solar cells
Journal of Applied Physics 115, 014504 (2014)
DOI: 10.1063/1.4858393

M. Maiberg, R. Scheer:
Theoretical study of time-resolved luminescence in semiconductor heterostructures. 1. Decay from the steady state
Journal of Applied Physics 116, 123710 (2014)
DOI: 10.1063/1.4896483

M. Maiberg, R. Scheer
Theoretical study of time-
resolved luminescence in semiconductor heterostructures. 2. Pulsed excitation
Journal of Applied Physics 116, 123711 (2014)
DOI: 10.1063/1.4896484

M. Maiberg, C. Spindler, E. Jarzembowski, R. Scheer
Electrical characterization of Cu(In, Ga)Se2-solar cells by voltage dependent time-resolved photoluminescence
Thin Solid Films 582, 379-382 (2014)
DOI: 10.1016/j.tsf.2014.09.022

P. Pistor, J. Borchert, W. Fränzel, R. Csuk, R. Scheer
Monitoring the Phase Formation of Coevaporated Lead Halide Perovskite Thin Films by in Situ X-ray Diffraction
Journal of Physical Chemistry Letters 5, 3308-3312 (2014)
DOI: 5(19).10.1021/jz5017312

W. Witte, D. Abou-Ras, K. Albe, G. H. Bauer, F. Bertram, C. Boit, R. Brüggemann, J. Christen, J. Dietrich, A. Eicke, D. Hariskos, M. Maiberg, R. Mainz, M. Meessen, M. Müller, O. Neumann, T. Orgis, S. Paetel, J. Pohl, H. Rodriguez-Alvarez, R. Scheer, H.-W. Schock, T. Unold, A. Weber, M. Powalla
Gallium gradients in Cu(In,Ga)Se2 thin-film solar cells
Progress in Photovoltaics: Research and Applications 23, 717-733 (2014)
DOI: 10.1002/pip.2485

2013

E. Jarzembowski, S. Hartnauer, W. Fränzel, K. Kaufmann, R. Scheer
Investigation of Selenium to metal evaporation ratio with respect to absorber structure and electrical properties of  Cu(In,Ga)Se2 thin film solar cells
28th European Photovoltaik Solar Energy Conference, 2319-2322 (2013)
DOI: 10.4229/28thEUPVSEC2013-3BV.5.49

H. Kempa, T. Rissom, U. Hlawatsch, M. Gaudig, F. Obereigner, C. A. Kaufmann, R. Scheer
Metastability of solar cells based on evaporated chalcopyrite absorber layers prepared with varying selenium flux
Thin Solid Films 535, 340-342 (2013)
DOI: 10.1016/j.tsf.2012.10.036

T. Orgis, M. Maiberg, R. Scheer
Influence of band gradients on Cu(In,Ga)Se2 solar cell diode factors
Journal of Applied Physics 114, 214506 (2013)
DOI: 10.1063/1.4840995

2012

V. Mertens, T. Ballmann, J. Y. Lee, M. Junghänel, F. Stenzel, L. Brandt, A. Schulze, P. Engelhart, J. W. Müller, P. Wawer, K. H. Küsters
Influence of Base Resistivity on Solar Cell Parameters of Double-side Contacted Rear Junction Solar Cells
2nd International Conference on Crystalline Silicon Photovoltaics SiliconPV, 53-58 (2012)
DOI: 10.1016/j.egypro.2012.07.028

R. Scheer
Open questions after 20 years of CuInS2 research
Progress in Photovoltaics: Research and Applications 20, 507-511 (2012)
DOI: 10.1002/pip.2155

Articles in journals

R. Klenk, J. Klaer, Ch. Köble, R. Mainz, S. Merdes, H. Rodriguez-Alvarez, R. Scheer, H.-W. Schock
Development of CuInS2-based solar cells and modules
Solar Energy Materials and Solar Cells 95, 1441-1445 (2011)
DOI: 10.1016/j.solmat.2010.11.001

R. Scheer
Toward an electronic model for CuIn1-xGaxSe2 solar cells
Thin Solid Films 519, 7472-7475 (2011)
DOI: 10.1016/j.tsf.2011.01.092

R. Scheer, H.-W. Schock
Chalcogenide Photovoltaics. Physics, Technologies, and Thin Film Devices
WILEY-VCH Verlag GmbH &Co.KGaA (2011)
ISBN: 978-3-527-31459-1

DOI: 10.1002/9783527633708

H. Wilhelm , H.-W. Schock , R. Scheer
Interface recombination in heterojunction solar cells: Influence of buffer layer thickness
Journal of Applied Physics 109, 084514 (2011)
DOI: 10.1063/1.3554409

2010

B. Marsen, L. Steinkopf, A. Singh, H. Wilhelm, I. Lauermann, T. Unold, R. Scheer, H.-W. Schock
Effects of Ti-incorporation in CuInS2 solar cells
Solar Energy Materials and Solar Cells 94, 1730-1733 (2010)
DOI: 10.1016/j.solmat.2010.05.036

H. Rodriguez-Alvarez, R. Mainz, R. Scheer, H.-W. Schock
Reaction paths during the sulfurization of In/Cu-Ga and u-In-Ga thin films
5th World Conference on Photovoltaic Energy Conversion, 3406-3410 (2010)
DOI: 10.4229/25thEUPVSEC2010-3BV.2.69

R. Scheer, A. Pérez-Rodriguez, W. K. Metzger
Advanced diagnostic and control methods of processes and layers in CIGS solar cells and modules

Progress in Photovoltaics: Research and Applications 18, 467-480 (2010)
DOI: 10.1002/pip.966

2009

D. Abou-Ras, C. T. Koch, V. Kustner, P. A. van Aken, U. Jahn, M. A. Contreras, R. Caballero, C. A. Kaufmann, R. Scheer, T. Unold, H.-W.  Schock
Grain-boundary types in chalcopyrite-type thin films and their correlations with film texture and electrical properties
Thin Solid Films 517, 2545-2549 (2009)
DOI: 10.1016/j.tsf.2008.11.044

M. Nichterwitz, D. Abou-Ras, K. Sakurai, J. Bundesmann, T. Unold, R. Scheer, H.-W. Schock
Influence of grain boundaries on current collection in Cu(In,Ga)Se2 thin-film solar cells
Thin Solid Films 517, 2554-2557 (2009)
DOI: 10.1016/j.tsf.2008.11.064

R. Scheer
Activation energy of heterojunction diode currents in the limit of interface recombination
Journal of Applied Physics 105, 104505 (2009)
DOI: 10.1063/1.3126523

R. Scheer, J.-F. Guillemoles, A. N. Tiwari, S. Niki, C. S. Ferekides, D. Abou-Ras
Thin Film Chalcogenide Photovoltaic Materials
Thin Solid Films 517, 2107-2107 (2009)
DOI: 10.1016/j.tsf.2008.10.064

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