Dresden 2017 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 28: Poster: Fundamentals of Perovskite Photovoltaics (joint session CPP, DS, HL)
HL 28.2: Poster
Montag, 20. März 2017, 18:30–21:00, P1A
Ultrafast charge and exciton dynamics in CH3NH3PbI3 — •Kestutis Budzinauskas1, Yajun Gao1, Elina Patsikatheodorou1, Tobias Schneider2, Selina Otlhof2, Klaus Meerholz2, and Paul H.M van Loosdrecht1 — 1University of Cologne, II physics institute — 2University of Coglogne, Institute of chemical physics
Solar cells based on organic-inorganic perovskite semiconductors show a surprisingly high conversion effciency. Despite tremendous progress in the field of perovskite based devices, the fundamental photophysics responsible for the good performance are still not well understood. In order to obtain a better insight of the charge separation and recombination dynamics in these materials we have performed ultrafast time resolved absorption experiments in the VIS/NIR spectral range on pure MAPbI3 (CH3 NH3PbI3) films, as well as on multilayer systems which use PEDOT:PSS and PC61BM as charge selective extraction layers. Our experiments allow to selectively monitor diffusion and recombination processes as well as interfacial charge transfer and the formation of interfacial charge transfer states with a sub-100 fs time resolution