High performance n-type Ag2Se film on nylon membrane for flexible thermoelectric power generator

Yufei Ding, Yang Qiu, Kefeng Cai (), Qin Yao, Song Chen, Lidong Chen () and Jiaqing He ()
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Yufei Ding: Tongji University
Yang Qiu: Southern University of Science and Technology
Kefeng Cai: Tongji University
Qin Yao: Chinese Academy of Science
Lidong Chen: Chinese Academy of Science
Jiaqing He: Southern University of Science and Technology

Nature Communications, 2019, vol. 10, issue 1, 1-7

Abstract: Abstract Researches on flexible thermoelectric materials usually focus on conducting polymers and conducting polymer-based composites; however, it is a great challenge to obtain high thermoelectric properties comparable to inorganic counterparts. Here, we report an n-type Ag2Se film on flexible nylon membrane with an ultrahigh power factor ~987.4 ± 104.1 μWm−1K−2 at 300 K and an excellent flexibility (93% of the original electrical conductivity retention after 1000 bending cycles around a 8-mm diameter rod). The flexibility is attributed to a synergetic effect of the nylon membrane and the Ag2Se film intertwined with numerous high-aspect-ratio Ag2Se grains. A thermoelectric prototype composed of 4-leg of the Ag2Se film generates a voltage and a maximum power of 18 mV and 460 nW, respectively, at a temperature difference of 30 K. This work opens opportunities of searching for high performance thermoelectric film for flexible thermoelectric devices.

Date: 2019
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DOI: 10.1038/s41467-019-08835-5

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