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Bandgap Engineering of Lead‐Halide Perovskite‐Type Ferroelectrics
Author(s) -
Ye HengYun,
Liao WeiQiang,
Hu ChunLi,
Zhang Yi,
You YuMeng,
Mao JiangGao,
Li PengFei,
Xiong RenGen
Publication year - 2016
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201505224
Subject(s) - materials science , perovskite (structure) , ferroelectricity , halide , band gap , optoelectronics , dielectric , inorganic chemistry , chemical engineering , engineering , chemistry
Semiconducting ferroelectricity is realized in hybrid perovskite‐type compounds (cyclohexylammonium) 2 PbBr 4−4 x I 4 x ( x = 0–1). By adjusting the composition x , the bandgap is successfully tuned from previously reported 3.65 eV to as low as 2.74 eV, and the excellent ferroelectricity was kept intact. This finding may contribute to improving the photoelectronic and/or photovoltaic performance of hybrid perovskite‐type compounds.