Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

CPP: Fachverband Chemische Physik und Polymerphysik

CPP 13: Poster: Fundamentals of Perovskite Photovoltaics (joint session CPP, DS, HL)

CPP 13.3: 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 Cologne, 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 (CH₃NH₃PbI₃) 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.