Regensburg 2016 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 90: Poster III

HL 90.4: Poster

Thursday, March 10, 2016, 16:00–19:00, Poster A

Time-resolved photoluminescence in Cu₂ZnSn(S,Se)₄ solar cells — •Mario Lang¹, Alexander Opolka¹, Christoph Krämmer¹, Tobias Abzieher², Thomas Schnabel², Erik Ahlswede², Michael Powalla^2,3, Heinz Kalt¹, and Michael Hetterich¹ — ¹Insitute of Applied Physics, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany — ²Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg, 70565 Stuttgart, Germany — ³Light Technology Institute, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany

Solar cells made of Cu₂ZnSn(S,Se)₄ (CZTSSe) offer a high potential for commercial application. So far efficiencies up to 12.6% have been achieved, but the material suffers from its high open-circuit voltage deficit. The origin of this huge deficit is still an open question, but can probably be attributed to the complex defect structure of the material. Spectrally as well as time-resolved photoluminescence (TRPL) are suitable methods to gain information about the defect structure and can be used to further study the physical recombination mechanisms in CZTSSe solar cells. In this contribution we investigate the decay dynamics and loss mechanisms by time-resolved photoluminescence in dependence of excitation power and temperature.