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

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

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 crystallini...

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Veröffentlicht in:Advanced energy materials 2017-06, Vol.7 (12), p.n/a
Hauptverfasser: Long, Mingzhu, Zhang, Tiankai, Xu, Wangying, Zeng, Xiaoliang, Xie, Fangyan, Li, Qiang, Chen, Zefeng, Zhou, Fengrui, Wong, Kam Sing, Yan, Keyou, Xu, Jianbin
Format: Artikel
Sprache:eng
Schlagworte:
Crystallinity
Energy conversion efficiency
halide exchanges
Halides
high stability
intermediate chemistry
large crystals
perovskite solar cells
Perovskites
Photovoltaic cells
Solar cells
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Zusammenfassung: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
1614-6840
DOI:10.1002/aenm.201601882