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HL: Fachverband Halbleiterphysik

HL 13: Poster Session I

HL 13.50: Poster

Montag, 12. März 2018, 17:30–19:30, Poster B

A chain is as strong as its weakest link − Stability study of MAPbI₃ under light and temperature — •Philippe Holzhey^1,2 and Michael Saliba² — ¹Fachbereich Physik, Freie Universität Berlin, D-14195 Berlin, Germany — ²Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne CH-1015, Switzerland

The stability of perovskite solar cells has been considered poor compared to other solar cells. One reason for this is thought to be the volatile organic methylammonium (MA) cation. At the same time, small amounts of MA are used for practically all highest performing solar cells with efficiencies beyond 21%. These compositions have also shown some of the best reported stabilities indicating that MA might not be as unstable as previously assumed. This raises the question whether excluding MA for the sake of stability has been concluded prematurely. Here, we use weakest link devices, i.e. MAPbI₃, to study the stability under light and different temperatures.