Issue 30, 2023

Flexible Bi2Te3/PEDOT nanowire sandwich-like films towards high-performance wearable cross-plane thermoelectric generator and temperature sensor array

Abstract

It is of significance to develop high-performance organic/inorganic hybrid thermoelectric (TE) materials for flexible cross-plane TE devices. In this work, we synthesize a flexible and free-standing sandwich-like TE film by depositing Bi2Te3 nanocrystals into a conducting porous PEDOT nanowire scaffold. The mechanically robust Bi2Te3@PEDOT nanowire film exhibits a record Seebeck coefficient of 266.4 μV K−1 with a corresponding power factor of 740.2 μW m−1 K−2 and a zT value of 0.27 at room temperature. Afterwards, we build new types of wearable cross-plane TE generator (TEG) and TE-powered temperature sensor array with a reduced number of electric leads in comparison to traditional designs. The TEG shows a maximum output power density of 3.48 μW cm−2 at a temperature difference of 17.8 K (predicted output power density of 70.6 μW cm−2 at ΔT = 80 K), outperforming most of the organic and organic/inorganic based ones. The conformal TE-powered temperature sensor array exhibits high and stable thermal sensitivity with a resolution of 0.05 K.

Graphical abstract: Flexible Bi2Te3/PEDOT nanowire sandwich-like films towards high-performance wearable cross-plane thermoelectric generator and temperature sensor array

Supplementary files

Article information

Article type
Paper
Submitted
15 May 2023
Accepted
12 Jun 2023
First published
13 Jun 2023

J. Mater. Chem. A, 2023,11, 16039-16048

Flexible Bi2Te3/PEDOT nanowire sandwich-like films towards high-performance wearable cross-plane thermoelectric generator and temperature sensor array

M. Du, J. Ouyang and K. Zhang, J. Mater. Chem. A, 2023, 11, 16039 DOI: 10.1039/D3TA02876C

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