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Phase transitions and degradation/oxidation mechanisms in lead-free CsSnI3 halide perovskites.

Authors :
Ivanova, Alexandra
Golikova, Margarita
Luchnikov, Lev
Gostishchev, Pavel
Shetinin, Igor
Voronov, Victor
Saranin, Danila
Khovaylo, Vladimir
Source :
Clean Energy; Jun2024, Vol. 8 Issue 3, p109-115, 7p
Publication Year :
2024

Abstract

Halide perovskites possess ultra-low thermal conductivity and show high potential for thermoelectric devices. The chemical properties and molecular structure of halide perovskite materials are not completely stable under ambient conditions, which hinders their use in thermoelectric generators. Changes in the properties of bulk halide perovskite thermoelectrics are accompanied by partial phase transitions and surface oxidation processes. In this paper, we conducted a comprehensive study of the transport and structural properties of CsSnI<subscript>3</subscript>, which were pristine by vacuum melting followed by spark plasma sintering. The research results on the electrical transport of these materials revealed that exposure to an inert atmosphere does not deteriorate stability and the properties of the materials remain unchanged. However, prolonged exposure to air leads to a significant degradation of the electrical transport properties. Contrary to thin-film samples, the shift to the double perovskite structure from the perovskite one is limited to a specific surface layer. This change significantly influences the electrical transport of the material while maintaining the essential properties of both perovskite types. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09187510
Volume :
8
Issue :
3
Database :
Complementary Index
Journal :
Clean Energy
Publication Type :
Academic Journal
Accession number :
177720733
Full Text :
https://doi.org/10.1093/ce/zkae028