Homogenous Alloys of Formamidinium Lead Triiodide and Cesium Tin Triiodide for Efficient Ideal‐Bandgap Perovskite Solar Cells | Zendy

Zong Yingxia | Zendy; Wang Ning | Zendy; Zhang Lin | Zendy; Ju MingGang | Zendy; Zeng Xiao Cheng | Zendy; Sun Xiao Wei | Zendy; Zhou Yuanyuan | Zendy; Padture Nitin P. | Zendy

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Homogenous Alloys of Formamidinium Lead Triiodide and Cesium Tin Triiodide for Efficient Ideal‐Bandgap Perovskite Solar Cells

Author(s) -

Zong Yingxia,

Wang Ning,

Zhang Lin,

Ju MingGang,

Zeng Xiao Cheng,

Sun Xiao Wei,

Zhou Yuanyuan,

Padture Nitin P.

Publication year - 2017

Publication title -

angewandte chemie international edition

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 1433-7851

DOI - 10.1002/anie.201705965

Subject(s) - formamidinium , triiodide , materials science , perovskite (structure) , band gap , energy conversion efficiency , caesium , tin , solar cell , nanotechnology , optoelectronics , inorganic chemistry , chemistry , metallurgy , crystallography , electrode , dye sensitized solar cell , electrolyte

The alloying behavior between FAPbI 3 and CsSnI 3 perovskites is studied carefully for the first time, which has led to the realization of single‐phase hybrid perovskites of (FAPbI 3 ) 1− x (CsSnI 3 ) x (0< x <1) compositions with anomalous bandgaps. (FAPbI 3 ) 1− x (CsSnI 3 ) x perovskites exhibit stable, homogenous composition/microstructure at the nanoscale, as confirmed by microscopic characterization. The ideal bandgap of 1.3 eV for single‐junction solar cell operation is achieved in the rationally‐tailored (FAPbI 3 ) 0.7 (CsSnI 3 ) 0.3 ‐composition perovskite. Solar cells based on this new perovskite show power conversion efficiency up to 14.6 %.

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