Critical Role of Grain Boundaries for Ion Migration in Formamidinium and Methylammonium Lead Halide Perovskite Solar Cells. Issue 13 (27th May 2016)

• Record Type: Journal Article
• Authors: Yun, Jae S.; Seidel, Jan; Kim, Jincheol; Soufiani, Arman Mahboubi; Huang, Shujuan; Lau, Jonathan; Jeon, Nam Joong; Seok, Sang Il; Green, Martin A.; Ho‐Baillie, Anita
• Is Part Of: Advanced energy materials. Volume 6:Issue 13(2016)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2016-05-27
• Subjects: grain boundaries -- ion migration -- Kelvin probe force microscopy -- organic–inorganic perovskites; Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201600330
• Languages: English
• ISSNs: 1614-6832

Abstract

Abstract : The critical role of grain boundaries for (CH(NH2 )2 PbI3 )0.85 (CH3 NH3 PbBr3 )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.