The Thermoelectric Performance Enhancement of N-Type BiTeSe Alloys by Addition of ZnAlO

Abstract:

A series of n-type BiTeSe/ZnAlO composites were prepared by zone melting method. Thermoelectric properties, including the electrical conductivity σ, Seebeck coefficient α and thermal conductivity κ, were measured in the temperature range of 300-550K. Results show that the electrical properties have been slightly lowered due to the reduced carrier concentration by ZnAlO addition. However, the low-temperature-shifted peak α, resulting from the prematurely happened intrinsic excitation, have shifted peak ZT to lower temperatures. As a result, the ZT values at 300 K were significantly enhanced for BiTeSe/ZnAlO composites compared to that of BiTeSe, making more attractive for cooling applications at ambient temperature.

• Periodical: Key Engineering Materials (Volumes 512-515)
• Pages: 1647-1650
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.512-515.1647
• Online since: June 2012
• Authors: Ting Zhang, Jun Jiang, Sheng Hui Yang, Yong Biao Zhai, Gao Jie Xu
• Keywords: N-Type BiTeSe, Thermoelectric Performance, ZnAlO Addition, Zone Melting

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