Large‐Grain Formamidinium PbI3–xBrx for High‐Performance Perovskite Solar Cells via Intermediate Halide Exchange. Issue 12 (30th January 2017)

• Record Type: Journal Article
• Authors: Long, Mingzhu; Zhang, Tiankai; Xu, Wangying; Zeng, Xiaoliang; Xie, Fangyan; Li, Qiang; Chen, Zefeng; Zhou, Fengrui; Wong, Kam Sing; Yan, Keyou; Xu, Jianbin
• Is Part Of: Advanced energy materials. Volume 7:Issue 12(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-01-30
• Subjects: halide exchanges -- high stability -- intermediate chemistry -- large crystals -- perovskite solar cells; 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.201601882
• Languages: English
• ISSNs: 1614-6832

Abstract

Abstract : Deliberate halide exchange between unstable intermediate HPbI2 Br and nonstoichiometric FAI is employed to produce high‐quality FAPbI3– x Br x ( 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.