Berlin 2018 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 18: Perovskite and Hybrid Photovolatics
HL 18.10: Vortrag
Dienstag, 13. März 2018, 12:00–12:15, EW 203
Large scale compositional and electronic inhomogeneities in MAPbI3 perovskite films — •Qing Sun1,2 and Yana Vanyzof1,2 — 1Kirchhoff Institute für Physik, Universität Heidelberg — 2Center for Advanced Material, Universität Heidelberg
Recently, hybrid organic-inorganic halide perovskites have gained significant attention in the field of thin film photovoltaics due to its rapid increase in power conversion efficiencies from 3.8% to around 22%. This tremendous progress is a result of the advantageous optoelectronic properties of perovskite materials and extensive research efforts dedicated to improving the layer microstructure and charge extraction layers. While significant amount of work had been performed to further improve the efficiency of the devices, much less attention has been focused on the large variations observed in the performance of identically prepared perovskite solar cells within single studies. Here, we preform macroscopic characterisation of the CH3NH3PbI3 films prepared by different methods and identify large scale inhomogeneities in the layer properties across each sample. After deposition of ETL and electrode and analyzing their current density-voltage curves, we are able to correlate the variation in PSCs performance to the inhomogeneities observed in the perovskite films.