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Home NEWS Science News Chemistry

High performance solid-state thermoelectric energy conversion via inorganic metal halide perovskites under tailored mechanical deformation

Bioengineer by Bioengineer
August 22, 2022
in Chemistry
Reading Time: 2 mins read
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Solid-state thermoelectric energy conversion devices attract broad research interests because they show great promises in waste heat recycling, space power generation, deep water power generation, and temperature control, but the search for the essential thermoelectric materials with high performance remains challenging.

High performance solid-state thermoelectric energy conversion via inorganic metal halide perovskites under tailored mechanical deformation

Credit: HIGHER EDUCATION PRESS LIMITED COMPANY

Solid-state thermoelectric energy conversion devices attract broad research interests because they show great promises in waste heat recycling, space power generation, deep water power generation, and temperature control, but the search for the essential thermoelectric materials with high performance remains challenging.

A research group of Lingling Zhao from Southeast University and Shangchao Lin from Shanghai Jiao Tong University just investigated inorganic metal halide perovskites CsPb(I1–xBrx)3 under mechanical deformation systematically using the first-principle calculations and the Boltzmann transport theory. They demonstrate that intrinsic strains can be introduced into thermoelectric devices under mechanical deformation, which opens up a new technical approach for improving the stability and thermoelectric performance of perovskite materials.

Halogen mixing and mechanical deformation are efficient methods to tailor the electronic structures and charge transport properties in CsPb(I1–xBrx)3 synergistically. The strain effect is related to the energy level shift of the electronic band structure CBM of perovskite. The power generation efficiency of the thermoelectric device can reach as high as approximately 12% using mixed halide perovskites under tailored mechanical deformation when the heat-source is at 500 K and the cold side is maintained at 300 K, surpassing the performance of many existing bulk thermoelectric materials.

This study can provide theoretical guidance for the transport performance regulation of perovskite and the performance improvement of thermoelectric devices.



Journal

Frontiers in Energy

DOI

10.1007/s11708-022-0831-y

Method of Research

Experimental study

Subject of Research

Not applicable

Article Title

High performance solid-state thermoelectric energy conversion via inorganic metal halide perovskites under tailored mechanical deformation

Article Publication Date

19-Jul-2022

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