Ag2Se as a tougher alternative to n-type Bi2Te3 thermoelectrics

Min Liu, Xinyue Zhang, Shuxian Zhang and Yanzhong Pei ()
Additional contact information
Min Liu: Tongji Univ.
Xinyue Zhang: Tongji Univ.
Shuxian Zhang: Tongji Univ.
Yanzhong Pei: Tongji Univ.

Nature Communications, 2024, vol. 15, issue 1, 1-6

Abstract: Abstract For half a century, only Bi2Te3-based thermoelectrics have been commercialized for near room temperature applications including both power generation and refrigeration. Because of the strong layered structure, Bi2Te3 in particular for n-type conduction has to be texturized to utilize its high in-plane thermoelectric performance, leaving a substantial challenge in toughness. This work presents the fabrication and performance evaluation of thermoelectric modules based on n-type Ag2Se paring with commercial p-Bi2Te3. Ag2Se mechanically allows an order of magnitude larger fracture strain and thermoelectrically secures the module efficiency quite competitive to that of commercial one for both refrigeration and power generation within ± 50 K of room temperature, enabling a demonstration of a significantly tougher alternative to n-type Bi2Te3 for practical applications.

Date: 2024
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DOI: 10.1038/s41467-024-50898-6

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