Dresden 2011 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 39: Photovoltaics: Chalcopyrites I
HL 39.3: Vortrag
Dienstag, 15. März 2011, 14:00–14:15, FOE Anorg
Dynamics of light-induced changes in CIGSe2 solar cells with electroplated absorber — •Anton Werth1, Janet Neerken1, Jörg Ohland1, Jürgen Parisi1, Ingo Riedel1, and Juan Rechid2 — 1Carl-von-Ossietzky Universität Oldenburg, Carl-von-Ossietzky-Straße 9-11, D-26129 Oldenburg — 2CIS Solartechnik GmbH & Co. KG, c/o Aurubis AG, Hovestr. 50, D-20539 Hamburg
In this work we studied the transient evolution of the J-V-characteristics of CIGSe2 solar cells during light soaking (LS). The failure of the dark-light superposition (cross over - CO) evolves already within seconds whereas the positive effect of the LS procedure shows up on large time scales (several hours up to days). We focus on the evolution and relaxation dynamics of these mechanisms in CIGSe2-solar cells with CdS and an alternative buffer layer. The investigations include IV-analysis and space charge profiling on different time scales (miliseconds up to several hours). The influence of the spectral composition of the irradiation used for LS was also considered. We discuss our results in terms of photoinduced changes of the conduction band offset and the metastable interface characteristics of the buffer-absorber interface.