AUTHOR=Umedov Shodruz T. , Grigorieva Anastasia V. , Lepnev Leonid S. , Knotko Alexander V. , Nakabayashi Koji , Ohkoshi Shin-ichi , Shevelkov Andrei V. 

TITLE=Indium Doping of Lead-Free Perovskite Cs2SnI6

JOURNAL=Frontiers in Chemistry

VOLUME=8

YEAR=2020

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2020.00564

DOI=10.3389/fchem.2020.00564

ISSN=2296-2646

ABSTRACT=<p>Structure and properties of an inorganic perovskite Cs<sub>2</sub>SnI<sub>6</sub> demonstrated its potential as a light-harvester or electron-hole transport material; however, its optoelectronic properties are poorer than those of lead-based perovskites. Here, we report the way of light tuning of absorption and transport properties of cesium iodostannate(IV) Cs<sub>2</sub>SnI<sub>6</sub> via partial heterovalent substitution of tin for indium. Light absorption and optical bandgaps of materials have been investigated by UV-vis absorption and photoluminescent spectroscopies. Low-temperature electron paramagnetic resonance spectroscopy was used to study the kind of paramagnetic centers in materials.</p>