Critical role of grain boundaries for ion migration in formamidinium and methylammonium lead halide perovskite solar cells

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

227 Citations (Scopus)

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 migration leading to a rearranged ion distribution. Such a distribution favors photogenerated charge‐carrier collection at the grain boundaries.

Original languageEnglish
Article number1600330
Number of pages8
JournalAdvanced Energy Materials
Volume6
Issue number13
DOIs
Publication statusPublished - 6 Jul 2016
Externally publishedYes

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