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Large-Grain Formamidinium PbI3– xBrx for High-Performance Perovskite Solar Cells via Intermediate Halide Exchange

Authors Long, Mingzhu
Zhang, Tiankai
Xu, Wangying
Zeng, Xiaoliang
Xie, Fangyan
Li, Qiang HKUST affiliated (currently or previously)
Chen, Zefeng
Zhou, Fengrui
Wong, Kam Sing View this author's profile
Yan, Keyou
Xu, Jianbin
Issue Date 2017
Source Advanced Energy Materials , v. 7, (12), June 2017, Article number 1601882
Summary Deliberate halide exchange between unstable intermediate HPbI2Br and nonstoichiometric FAI is employed to produce high-quality FAPbI3–xBrx (x ≈ 0.44), which eliminates the use of antisolvent dripping and other post-treatment techniques. The obtained perovskite thin film demonstrates high crystallinity and a large and compact crystal domain up to 2–3 µm. The corresponding device shows power conversion efficiency of up to around 19.0%, with reliable stability and reproducibility.
ISSN 1614-6832
Language English
Format Article
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