In order to improve the thermoelectric performance of flexible wearable energy supply equipment, NaOH and dimethylsulfoxide ( DMSO ) are used together to dope poly ( 3, 4-ethylenedioxythiophene)-poly(styrenesulfonate)(PEDOT:PSS)to prepare NaOH/DMSO/PEDOT:PSS thermoelectric film, and the influence of NaOH and DMSO concentration on the conductivity, Seebeck coefficient and power factor of PEDOT:PSS were studied. Cotton/polyester spacer fabric was used as the substrate, and the photothermal-thermoelectric composite thermoelectric material was prepared by compounding NaOH/DMSO/PEDOT:PSS and coating ZrC/polyurethane ( PU) photothermal layer, and the morphology, structure and thermoelectric properties of the composites were characterized. The results show that when 0. 5% NaOH and 3. 5% DMSO are added, the power factor of NaOH/DMSO/PEDOT:PSS thermoelectric film reaches the peak value of 25. 6μW/(m·K2), which is 2 327 times that of pure PEDOT:PSS film. The Seebeck coefficient of the photothermal-thermoelectric composite material is 35. 5 μV/K, and the voltage generated by the thermoelectric composite material under illumination after adding the photothermal layer is 6. 3 times that of the thermoelectric composite material without a photothermal layer.
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