Article

2020; 20(3): 400-405

Published online January 7, 2020 https://doi.org/10.1016/j.cap.2019.12.010

Copyright © The Korean Physical Society.

Study on the thermoelectric properties of porous Bi-Te films deposited using thermal evaporation on AAO template

Liu S., Li G., Lan M., Piao Y., Zhang Y., Wang Q.

Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang, 110819, China; School of Metallurgy, Northeastern University, Shenyang, 110819, China; School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, China

Correspondence to:Li, Guojian
Key Laboratory of Electromagnetic Processing of Materials, Northeastern University

Received: August 13, 2019; Accepted: December 30, 2019

Abstract

The application of thermoelectric films is limited to retain the temperature gradient. In this study, the Bi-Te films are deposited on the AAO template with a pore size of 100 nm using thermal evaporation. The results show that the conductive types of the Bi-Te film are tuned by source temperature. The power factor of the p-type porous film decreases 36% by comparing to that of the p-type nonporous film (1020 μW/mK2 at 250 °C). Meanwhile, the temperature difference in the porous device is maintained and is approximately 5.0 °C. Thus, the maximum output power is achieved in the porous device (about 25 pW), which is 5 times higher than that of the nonporous device. This provides a method to improve the conversion efficiency of thermoelectric film device by maintaining the temperature difference by using porous structure. © 2020 Korean Physical Society

Keywords: Nanopore, Temperature difference, Thermal evaporation, Thermoelectric film

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