Berlin 2015 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 60: Focus Session Hybrid Photovoltaics and Prevovskites I (joint session CPP HL, O)
CPP 60.11: Vortrag
Donnerstag, 19. März 2015, 12:45–13:00, C 130
Transient electrical studies probing charge carrier recombination in methylammonium lead iodide perovskite solar cells — •Andreas Baumann1, Stefan Väth2, Kristofer Tvinstedt2, Michael C. Heiber2, Cristina Momblona3, Henk J. Bolink3, and Vladimir Dyakonov1,2 — 1Bayerisches Zentrum für Angewandte Energieforschung, Am Galgenberg 87, D-97074 Würzburg — 2Experimentelle Physik 6, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg — 3Universidad de Valencia, Paterna, Spain
Organo-metal halide perovskites like methylammonium lead iodide show extraordinary photovotlaic performance with power conversion efficienies exceeding 20%. However, a fundamental understanding of the physical processes in perovskite solar cells is still lacking but is essential for further development in this quickly emerging research field. Here, we present our recent studies on the charge carrier recombination in methylammonium lead iodide perovskite solar cells in a planar configuration without porous transport layers by means of open circuit voltage decay measurements. The results are compared with the recombination behavior in reference state-of-the-art polymer-fullerene bulk heterojunction solar cells.[1] We observed two very different time domains in the transients of the perovskite solar cells in contrast to the organic reference solar cells. We will discuss potential origins of these unique behavior and compare the results for various device configurations.[1] A. Baumann et al., APL Mater. 2, 081501 (2014)