Structural, Morphological and Raman Characteristics of Cs2SnCl6 Double-Perovskite Crystals

Le Anh Thi; Le Duy Manh; Do Thi Anh Thu; Ho Truong Giang; Man Minh Tan

doi:10.51316/jca.2021.101

Authors

Le Anh Thi Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, VIETNAM. | Institute of Theoretical and Applied Research, Duy Tan University, Hanoi, 100000, VIETNAM. | Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, VIETNAM Author
Le Duy Manh Institute of Theoretical and Applied Research, Duy Tan University, Hanoi, 100000, VIETNAM. | Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, VIETNAM Author
Do Thi Anh Thu Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, VIETNAM. Author
Ho Truong Giang Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, VIETNAM. Author
Man Minh Tan Institute of Theoretical and Applied Research, Duy Tan University, Hanoi, 100000, VIETNAM. Author

DOI:

https://doi.org/10.51316/jca.2021.101

Keywords:

Sn-based perovskite, hydrothermal method, Raman Spectrum, photonuminescence

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 (A^1g) = 306 cm^-1, ν(E_g) = 229 cm^-1 and δ(F_2g) = 164 cm^-1. The Cs₂SnCl₆ crystals offer intriguing opportunities for their application in photonic, bioimaging, and chemical sensors.

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