Abstract
Sn-based perovskite Cs2SnX6 (X = Cl, Br, and I) are non‐toxic materials with a unique structure and wide energy bandgap (1.6-3.9 eV) caused by halide anions. We have successfully synthesized Cs2SnCl6 crystals and confirmed their underlying perovskite crystal structure. They show a cubic crystal structure, possessing a truncated octahedral morphology with an average crystalline grain size of around 0.5 µm. Experimental Micro-Raman scattering reveals three main peaks at ν (A1g) = 306 cm-1, ν(Eg) = 229 cm-1 and δ(F2g) = 164 cm-1. The Cs2SnCl6 crystals offer intriguing opportunities for their application in photonic, bioimaging, and chemical sensors.
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