Triboelectric Charge-Driven Enhancement of the Output Voltage of BiSbTe-Based Thermoelectric Generators

Triboelectric Charge-Driven Enhancement of the Output Voltage of BiSbTe-Based Thermoelectric Generators

A new approach to increasing the output voltage of a thermoelectric generator that does not involve material modification is demonstrated. The key component of the device is a dielectric layer and a metal layer with an air gap between them, attached at the cold side of a thermoelectric generator wit...

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Veröffentlicht in:ACS energy letters 2021-03, Vol.6 (3), p.1095-1103
Hauptverfasser: Kim, Sun-Woo, Yang, U Jeong, Lee, Jae Won, Kim, Fredrick, Kim, Yongchul, Lee, Geunsik, Son, Jae Sung, Baik, Jeong Min
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container_end_page 1103
container_issue 3
container_start_page 1095
container_title ACS energy letters
container_volume 6
creator Kim, Sun-Woo
Yang, U Jeong
Lee, Jae Won
Kim, Fredrick
Kim, Yongchul
Lee, Geunsik
Son, Jae Sung
Baik, Jeong Min
description A new approach to increasing the output voltage of a thermoelectric generator that does not involve material modification is demonstrated. The key component of the device is a dielectric layer and a metal layer with an air gap between them, attached at the cold side of a thermoelectric generator with a Cu/p-type BiSbTe/Au/Cr/SiO2/Si composition. When the two layers contact each other, negative charges are created on the dielectric surface, causing the electric potential difference across the two electrodes to increase, supported by density functional theory. An output voltage of ∼1.2 mV in a single BiSbTe TE leg is generated with an increase of 0.4 mV under a compressive force of 5 N. Finally, an active cooling system consisting of a small pinwheel is fabricated, and the output voltage is increased by the wind without a significant reduction in the wind speed through the pinwheel.
doi_str_mv 10.1021/acsenergylett.0c02483
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title Triboelectric Charge-Driven Enhancement of the Output Voltage of BiSbTe-Based Thermoelectric Generators
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