Abstract
Halide perovskite semiconductors have been actively considered for thermoelectric applications. We report the thermoelectric properties of thermally stable, all-inorganic perovskite CsSnBr3 prepared by two methods. Between 300 and 600 K, both types of CsSnBr3 crystals showed analogous trends of increasing Seebeck coefficients S and plummeting electrical conductivities σ. The counteraction between S and σ followed a semilogarithmic relation derived from a single band model for the electronic band structure of CsSnBr3. The ZT value maximized at ~0.01 and its enhancement by extrinsic doping is possible. Our results help assess the potential of CsSnBr3 and other halide perovskites as thermoelectric materials.
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