Berlin 2015 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 84: Focus Session (CPP with HL): Hybrid photovoltaics and perovskites II

HL 84.6: Talk

Thursday, March 19, 2015, 16:45–17:00, C 130

Spatially resolved photocurrent generation in organolead halide perovskite solar cells — Thomas J.K. Brenner, Andreas Paulke, Natalie Schön, Roberta Saponaro, and •Dieter Neher — Institute of Physics & Astronomy, University of Potsdam, Germany

Hybrid perovskite solar cells have shown to be efficient in various device structures, for example in planar, vapour deposited films, in and on mesostructured metal oxides and in solution-processed films of different crystallinity. Here, we study ITO/PEDOT:PSS/CH3NH3PbI3/PCBM/C60/BCP/Al devices with different perovskite crystallinity and identify regions of efficient photocurrent generation with submicrometer resolution. We establish a relationship between crystallinity and device performance and study the role of grain boundaries for photocurrent generation. We correlate our results to time delayed collection field (TDCF) measurements of charge generation to identify ways to further enhance photocurrent generation in this class of photovoltaic devices.