Molecules (Sep 2023)

High-Performance Ag<sub>2</sub>Se Film by a Microwave-Assisted Synthesis Method for Flexible Thermoelectric Generators

  • Zixing Wang,
  • Ying Liu,
  • Jiajia Li,
  • Changjun Huang,
  • Kefeng Cai

DOI
https://doi.org/10.3390/molecules28176397
Journal volume & issue
Vol. 28, no. 17
p. 6397

Abstract

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Flexible Ag2Se thermoelectric (TE) films are promising for wearable applications near room temperature (RT). Herein, a Ag2Se film on a nylon membrane with high TE performance was fabricated by a facile method. First, Ag2Se powders were prepared by a microwave-assisted synthesis method using Ag nanowires as a template. Second, the Ag2Se powders were deposited onto nylon via vacuum filtration followed by hot pressing. Through modulating the Ag/Se molar ratio for synthesizing the Ag2Se powders, an optimized Ag2Se film demonstrates a high power factor of 1577.1 μW m−1 K−2 and good flexibility at RT. The flexibility of the Ag2Se film is mainly attributed to the flexible nylon membrane. In addition, a six-leg flexible TE generator (f-TEG) fabricated with the optimized Ag2Se film exhibits a maximum power density of 18.4 W m−2 at a temperature difference of 29 K near RT. This work provides a new solution to prepare high-TE-performance flexible Ag2Se films for f-TEGs.

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