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We report on the solution processed bismuth triiodide (BiI3) solar cells and their optoelectronic properties under different fabrication approach. We report on solar cells device using solution processed bismuth triiodide...

Structure and properties of an inorganic perovskite Cs 2 SnI 6 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 2 SnI 6 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.