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Large Voltage Generation of Flexible Thermoelectric Nanocrystal Thin Films by Finger Contact

机译:手指接触产生大电压的柔性热电纳米晶体薄膜

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摘要

This paper demonstrates that thermal energy radiated from a human finger can be converted efficiently into electricity by a nanocrystal (NC) thin film that substantially suppresses thermal conduction, but still allows electric conduction. The converting efficiencies of the chalcogenide NC thin films with dimensions 40 mu m x 20 mu m x 20 nm, prepared on flexible substrates by a solution process, are maximized by adjusting the NC size. A Seebeck coefficient of S = 1829 mu V K-1, and a dimensionless thermoelectric figure-of-merit, ZT = 0.68 are achieved at ambient temperature for p- and n-type NC thin films, respectively. A thermoelectric array consisting of p- and n-type NC thin films generates a voltage of 645 mV for a temperature gradient of 10 K. Furthermore, the donut-shaped pn array can generate a voltage of 170 mV from the heat supplied by an individual's finger.
机译:本文证明,可以通过基本上抑制热传导但仍允许导电的纳米晶体(NC)薄膜,有效地将人手指辐射的热能转换为电能。通过调整NC尺寸可以最大程度地提高通过溶液法在柔性基板上制备的尺寸为40μmx 20μmx 20 nm的硫属化物NC薄膜的转换效率。对于p型和n型NC薄膜,在环境温度下分别实现了Seebeck系数S = 1829μV K-1和无因次热电品质因数ZT = 0.68。由p型和n型NC薄膜组成的热电阵列在10 K的温度梯度下产生645 mV的电压。此外,甜甜圈形的pn阵列可以根据个人提供的热量产生170 mV的电压。手指。

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