Regensburg 2016 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 11: Poster: Hybrid and Perovskite Photovoltaics
CPP 11.13: Poster
Montag, 7. März 2016, 18:15–21:00, Poster B2
Impact of PbI2 on excited state dynamics in hybrid lead halide perovskites — •Tobias Meier1, Fabian Panzer1,2,3, Tanaji Gujar4, Thomas Unger1,2, Mukundan Thelakkat4, and Anna Köhler1,2 — 1Experimental Physics II — 2Bayreuth Institute of Macromolecular Research (BIMF) — 3Department of Functional Materials — 4Applied Functional Polymers, Macromolecular Chemistry, University of Bayreuth, 95440 Bayreuth, Germany
Hybrid lead halide perovskites have emerged as novel and highly efficient active material in different applications such as solar cells, or light emitting device. They also yield the possibility for cheap and simple processing which makes this class of material currently highly attractive and prominent. Depending on the processing method, it is known that PbI2 incorporations can be present in the perovskite material after perovskite formation took place. Here a fundamental understanding on how and in which extend PbI2 interacts with the perovskite domains and how this impacts on device performance is still missing. We therefore performed temperature dependent steady-state absorption and emission measurements, as well as transient absorption spectroscopy to investigate the impact of PbI2 incorporations on the excited state dynamics in different CH3NH3PbI3 samples.