Yan Zhuqing, Zhao Yaxin, Liu Dan, Zhang Zhidong, Zheng Yongqiu, Cui Juan, Zhang Yanjun, Xue Chenyang
Key Laboratory of Instrumentation Science & Dynamic Measurement, Ministry of Education, North University of China Taiyuan 030051 China
RSC Adv. 2020 Dec 9;10(71):43840-43846. doi: 10.1039/d0ra08458a. eCollection 2020 Nov 27.
In this study, flexible thermoelectric tin selenide (SnSe)/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) composite films have been fabricated by the vacuum filtration method, and their thermoelectric properties were investigated. The electrical conductivities of the composite films have a tendency to decrease with an increase in the SnSe content, while their Seebeck coefficients have an inverse tendency. The electrical conductivities decrease gradually with an increase in temperature, while the Seebeck coefficients show a tendency to increase first and then decrease with the increase in temperature. The maximum power factor (PF = ) of the composite film is obtained when the SnSe content is 10 wt%, which is 24.42 μW m K at 353 K. Besides, the 10 wt% SnSe/PEDOT:PSS film exhibited excellent stability with only a 9% increase in resistance after 1000 bends under a bending radius of 4 mm. When the temperature gradient is 50 K, a flexible thermoelectric generator fabricated by 3 legs of the 10 wt% SnSe/PEDOT:PSS film has an open-circuit voltage and maximum output electrical power of 3.2 mV and 13.73 nW, respectively, which demonstrates a great potential application to power wearable flexible electronic devices.
在本研究中，通过真空过滤法制备了柔性热电硒化锡（SnSe）/聚（3,4 - 乙撑二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT:PSS）复合薄膜，并对其热电性能进行了研究。复合薄膜的电导率随SnSe含量的增加而呈下降趋势，而其塞贝克系数则呈现相反的趋势。电导率随温度升高而逐渐降低，而塞贝克系数则呈现先随温度升高而增大然后减小的趋势。当SnSe含量为10 wt%时，复合薄膜获得最大功率因数（PF = ），在353 K时为24.42 μW m K 。此外，10 wt% SnSe/PEDOT:PSS薄膜表现出优异的稳定性，在4 mm弯曲半径下经过1000次弯曲后电阻仅增加9%。当温度梯度为50 K时，由3条10 wt% SnSe/PEDOT:PSS薄膜制成的柔性热电发电机的开路电压和最大输出电功率分别为3.2 mV和13.73 nW，这表明其在为可穿戴柔性电子设备供电方面具有巨大的潜在应用价值。
