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Zhang, Meng; Yun, Jae S; Ma, Qingshan; Zheng, Jianghui; Lau, Cho Fai Jonathan; Deng, Xiaofan; Kim, Jincheol; Kim, Dohyung; Seidel, Jan; Green, Martin A; Huang, Shujuan; Ho-Baillie, Anita W. Y
ACS energy letters, 02/2017, Letnik: 2, Številka: 2Journal Article
We apply gas quenching to fabricate rubidium (Rb) incorporated perovskite films for high-efficiency perovskite solar cells achieving 20% power conversion efficiency on a 65 mm2 device. Both double-cation and triple-cation perovskites containing a combination of methylammonium, formamidinium, cesium, and Rb have been investigated. It is found that Rb is not fully embedded in the perovskite lattice. However, a small incorporation of Rb leads to an improvement in the photovoltaic performance of the corresponding devices for both double-cation and triple-cation perovskite systems.
