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Christian A. Kaufmann
Christian A. Kaufmann
PVD CIGSe@PVcomB, Helmholtz-Zentrum für Materialien und Energie Berlin
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Conformal monolayer contacts with lossless interfaces for perovskite single junction and monolithic tandem solar cells
A Al-Ashouri, A Magomedov, M Roß, M Jošt, M Talaikis, G Chistiakova, ...
Energy & Environmental Science 12 (11), 3356-3369, 2019
6772019
Interpretation of admittance, capacitance-voltage, and current-voltage signatures in Cu (In, Ga) Se2 thin film solar cells
T Eisenbarth, T Unold, R Caballero, CA Kaufmann, HW Schock
Journal of Applied Physics 107 (3), 2010
3342010
21.6%-Efficient Monolithic Perovskite/Cu(In,Ga)Se2 Tandem Solar Cells with Thin Conformal Hole Transport Layers for Integration on Rough Bottom Cell Surfaces
M Jošt, T Bertram, D Koushik, JA Marquez, MA Verheijen, ...
ACS Energy Letters 4 (2), 583-590, 2019
1982019
Perovskite/CIGS tandem solar cells: from certified 24.2% toward 30% and beyond
M Jost, E Köhnen, A Al-Ashouri, T Bertram, S Tomšič, A Magomedov, ...
ACS energy letters 7 (4), 1298-1307, 2022
1762022
The influence of Na on low temperature growth of CIGS thin film solar cells on polyimide substrates
R Caballero, CA Kaufmann, T Eisenbarth, M Cancela, R Hesse, T Unold, ...
Thin Solid Films 517 (7), 2187-2190, 2009
1612009
Experimental indication for band gap widening of chalcopyrite solar cell absorbers after potassium fluoride treatment
P Pistor, D Greiner, CA Kaufmann, S Brunken, M Gorgoi, A Steigert, ...
Applied Physics Letters 105 (6), 2014
1422014
Identifying the real minority carrier lifetime in nonideal semiconductors: a case study of kesterite materials
CJ Hages, A Redinger, S Levcenko, H Hempel, MJ Koeper, R Agrawal, ...
Advanced Energy Materials 7 (18), 1700167, 2017
1372017
Investigation of Cu(In,Ga)Se2 thin‐film formation during the multi‐stage co‐evaporation process
R Caballero, CA Kaufmann, V Efimova, T Rissom, V Hoffmann, ...
Progress in Photovoltaics: Research and Applications 21 (1), 30-46, 2013
1312013
Proton radiation hardness of perovskite tandem photovoltaics
F Lang, M Jošt, K Frohna, E Köhnen, A Al-Ashouri, AR Bowman, ...
Joule 4 (5), 1054-1069, 2020
1242020
Transfer of Cu (In, Ga) Se2 thin film solar cells to flexible substrates using an in situ process control
CA Kaufmann, A Neisser, R Klenk, R Scheer
Thin Solid Films 480, 515-519, 2005
1222005
Junction formation by Zn (O, S) sputtering yields CIGSe‐based cells with efficiencies exceeding 18%
R Klenk, A Steigert, T Rissom, D Greiner, CA Kaufmann, T Unold, ...
Progress in Photovoltaics: Research and Applications 22 (2), 161-165, 2014
1132014
Elucidating the mechanism of an RbF post deposition treatment in CIGS thin film solar cells
T Kodalle, MD Heinemann, D Greiner, HA Yetkin, M Klupsch, C Li, ...
Solar RRL 2 (9), 1800156, 2018
1012018
Comprehensive comparison of various techniques for the analysis of elemental distributions in thin films
D Abou-Ras, R Caballero, CH Fischer, CA Kaufmann, I Lauermann, ...
Microscopy and Microanalysis 17 (5), 728-751, 2011
992011
Depth profiling of Cu (In, Ga) Se2 thin films grown at low temperatures
CA Kaufmann, R Caballero, T Unold, R Hesse, R Klenk, S Schorr, ...
Solar Energy Materials and Solar Cells 93 (6-7), 859-863, 2009
982009
Influence of Na on Cu (In, Ga) Se2 solar cells grown on polyimide substrates at low temperature: Impact on the Cu (In, Ga) Se2/Mo interface
R Caballero, CA Kaufmann, T Eisenbarth, A Grimm, I Lauermann, T Unold, ...
Applied Physics Letters 96 (9), 2010
962010
CuIn1−xGaxSe2‐based thin‐film solar cells by the selenization of sequentially evaporated metallic layers
R Caballero, C Guillén, MT Gutiérrez, CA Kaufmann
Progress in Photovoltaics: Research and Applications 14 (2), 145-153, 2006
892006
Surface Cu depletion of Cu (In, Ga) Se2 films: An investigation by hard X-ray photoelectron spectroscopy
H Mönig, CH Fischer, R Caballero, CA Kaufmann, N Allsop, M Gorgoi, ...
Acta Materialia 57 (12), 3645-3651, 2009
872009
Characterization of metastabilities in Cu (In, Ga) Se2 thin-film solar cells by capacitance and current-voltage spectroscopy
T Eisenbarth, R Caballero, M Nichterwitz, CA Kaufmann, HW Schock, ...
Journal of Applied Physics 110 (9), 2011
832011
Impact of the Ga concentration on the microstructure of CuIn1–x Gax Se2
D Abou‐Ras, R Caballero, CA Kaufmann, M Nichterwitz, K Sakurai, ...
physica status solidi (RRL)–Rapid Research Letters 2 (3), 135-137, 2008
822008
High efficiency low temperature grown Cu(In,Ga)Se2 thin film solar cells on flexible substrates using NaF precursor layers
R Caballero, CA Kaufmann, T Eisenbarth, T Unold, R Klenk, HW Schock
Progress in Photovoltaics: Research and Applications 19 (5), 547-551, 2011
762011
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