Premium
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 %.