Cliff-like conduction band offset and KCN-induced recombination barrier enhancement at the CdS/Cu2ZnSnS4 thin-film solar cell heterojunction M Bär, BA Schubert, B Marsen, RG Wilks, S Pookpanratana, M Blum, ...
Applied Physics Letters 99 (22), 2011
251 2011 Improved performance of Ge‐alloyed CZTGeSSe thin‐film solar cells through control of elemental losses CJ Hages, S Levcenco, CK Miskin, JH Alsmeier, D Abou‐Ras, RG Wilks, ...
Progress in Photovoltaics: Research and Applications 23 (3), 376-384, 2015
226 2015 Isotope and temperature effects in liquid water probed by X-ray absorption and resonant X-ray emission spectroscopy O Fuchs, M Zharnikov, L Weinhardt, M Blum, M Weigand, Y Zubavichus, ...
Physical review letters 100 (2), 027801, 2008
223 2008 Determination of the band gap depth profile of the penternary Cu (In (1− X) GaX)(SYSe (1− Y)) 2 chalcopyrite from its composition gradient M Bär, W Bohne, J Röhrich, E Strub, S Lindner, MC Lux-Steiner, ...
Journal of applied physics 96 (7), 3857-3860, 2004
216 2004 Electronic surface level positions of WO3 thin films for photoelectrochemical hydrogen production L Weinhardt, M Blum, M Bär, C Heske, B Cole, B Marsen, EL Miller
The Journal of Physical Chemistry C 112 (8), 3078-3082, 2008
209 2008 Observation and mediation of the presence of metallic lead in organic–inorganic perovskite films G Sadoughi, DE Starr, E Handick, SD Stranks, M Gorgoi, RG Wilks, ...
ACS applied materials & interfaces 7 (24), 13440-13444, 2015
196 2015 Potassium Postdeposition Treatment-Induced Band Gap Widening at Cu(In,Ga)Se2 Surfaces – Reason for Performance Leap? E Handick, P Reinhard, JH Alsmeier, L Kohler, F Pianezzi, S Krause, ...
ACS applied materials & interfaces 7 (49), 27414-27420, 2015
181 2015 The doping mechanism of halide perovskite unveiled by alkaline earth metals N Phung, R Félix, D Meggiolaro, A Al-Ashouri, G Sousa e Silva, ...
Journal of the American Chemical Society 142 (5), 2364-2374, 2020
140 2020 Heavy Alkali Treatment of Cu(In,Ga)Se2 Solar Cells: Surface versus Bulk Effects S Siebentritt, E Avancini, M Bär, J Bombsch, E Bourgeois, S Buecheler, ...
Advanced Energy Materials 10 (8), 1903752, 2020
135 2020 Optical properties of ZnO thin films: Ion layer gas reaction compared to sputter deposition M Rebien, W Henrion, M Bär, CH Fischer
Applied Physics Letters 80 (19), 3518-3520, 2002
123 2002 Spray‐ILGAR indium sulfide buffers for Cu(In,Ga)(S,Se)2 solar cells NA Allsop, A Schönmann, HJ Muffler, M Bär, MC Lux‐Steiner, CH Fischer
Progress in Photovoltaics: Research and Applications 13 (7), 607-616, 2005
118 2005 Direct observation of an inhomogeneous chlorine distribution in CH 3 NH 3 PbI 3− x Cl x layers: surface depletion and interface enrichment DE Starr, G Sadoughi, E Handick, RG Wilks, JH Alsmeier, L Köhler, ...
Energy & Environmental Science 8 (5), 1609-1615, 2015
116 2015 Formation of a KInSe Surface Species by NaF/KF Postdeposition Treatment of Cu(In,Ga)Se2 Thin-Film Solar Cell Absorbers E Handick, P Reinhard, RG Wilks, F Pianezzi, T Kunze, ...
ACS applied materials & interfaces 9 (4), 3581-3589, 2017
114 2017 Using photoelectron spectroscopy and quantum mechanics to determine d-band energies of metals for catalytic applications T Hofmann, TH Yu, M Folse, L Weinhardt, M Bär, Y Zhang, BV Merinov, ...
The Journal of Physical Chemistry C 116 (45), 24016-24026, 2012
112 2012 Impact of KCN etching on the chemical and electronic surface structure of Cu2ZnSnS4 thin-film solar cell absorbers M Bär, BA Schubert, B Marsen, S Krause, S Pookpanratana, T Unold, ...
Applied physics letters 99 (15), 2011
111 2011 Highly‐efficient Cd‐free CuInS2 thin‐film solar cells and mini‐modules with Zn(S,O) buffer layers prepared by an alternative chemical bath process A Ennaoui, M Bär, J Klaer, T Kropp, R Sáez‐Araoz, MC Lux‐Steiner
Progress in Photovoltaics: Research and Applications 14 (6), 499-511, 2006
107 2006 High-resolution, high-transmission soft x-ray spectrometer for the study of biological samples O Fuchs, L Weinhardt, M Blum, M Weigand, E Umbach, M Bär, C Heske, ...
Review of Scientific Instruments 80 (6), 2009
100 2009 Depth-resolved band gap in Cu (In, Ga)(S, Se) 2 thin films M Bär, S Nishiwaki, L Weinhardt, S Pookpanratana, O Fuchs, M Blum, ...
Applied Physics Letters 93 (24), 2008
93 2008 Formation of a ZnS∕ Zn (S, O) bilayer buffer on CuInS2 thin film solar cell absorbers by chemical bath deposition M Bär, A Ennaoui, J Klaer, T Kropp, R Sáez-Araoz, N Allsop, I Lauermann, ...
Journal of applied physics 99 (12), 2006
93 2006 CdS and L Weinhardt, T Gleim, O Fuchs, C Heske, E Umbach, M Bär, HJ Muffler, ...
Applied physics letters 82 (4), 571-573, 2003
92 2003 
Regan WilksHelmholtz Zentrum Berlin für Materialien und EnergieAdresse e-mail validée de helmholtz-berlin.de
