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FAPb 0.5 Sn 0.5 I 3 : A Narrow Bandgap Perovskite Synthesized through Evaporation Methods for Solar Cell Applications
Author(s) -
Igual-Muñoz Ana M.,
Ávila Jorge,
Boix Pablo P.,
Bolink Henk J.
Publication year - 2020
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.201900283
Subject(s) - perovskite (structure) , materials science , band gap , optoelectronics , tandem , formamidinium , tin , energy conversion efficiency , solar cell , halide , perovskite solar cell , evaporation , inorganic chemistry , chemical engineering , chemistry , metallurgy , physics , engineering , composite material , thermodynamics
The tunability of the optoelectrical properties upon compositional modification is a key characteristic of metal halide perovskites. In particular, bandgaps narrower than those in conventional lead‐based perovskites are essential to achieve the theoretical efficiency limit of single‐absorber solar cells, as well as develop multijunction tandem devices. Herein, the solvent‐free vacuum deposition of a narrow bandgap perovskite based on tin–lead metal and formamidinium cation is reported. Pinhole‐free films with 1.28 eV bandgap are obtained by thermal codeposition of precursors. The optoelectrical quality of these films is demonstrated by their use in solar cells with a power conversion efficiency of 13.98%.