Critical Role of Grain Boundaries for Ion Migration in Formamidinium and Methylammonium Lead Halide Perovskite Solar Cells

Sung Yun, Jae; Seidel, Jan; Kim, Jincheol; Mahboubi Soufiani, Arman; Huang, Shujuan; Lau, Jonathan; Joong Jeon, Nam; Il Seok, Sang; A. Green, Martin; Ho‐Baillie, Anita

doi:10.1002/aenm.201600330

Public

Critical Role of Grain Boundaries for Ion Migration in Formamidinium and Methylammonium Lead Halide Perovskite Solar Cells

Published in Advanced Energy Materials • May 27, 2016

Authors:

Jae Sung Yun

Jan Seidel

Jincheol Kim

Abstract

The critical role of grain boundaries for (CH(NH2)2PbI3)0.85(CH3NH3PbBr3)0.15 perovskite solar cells studied by Kelvin probe force microscopy under bias voltage and illumination is reported. Ion migration is enhanced at the grain boundaries. Under illumination, the light-induced potential causes ion...

Subject

Grain boundary

Perovskite (structure)

Materials science

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