Microfluidic Spinning Boosting Thermoelectric Performance of PEDOT:PSS Nonwoven Fabrics

A microfluidic spinning strategy is developed to fabricate PEDOT:PSS fibers with precisely engineered micro /nanoscale structures, effectively optimizing the trade-off between electrical conductivity and Seebeck coefficient. The PEDOT:PSS fiber achieves a high conductivity of 2038 S cm −1 and a Seebeck coefficient of 29.7 μV K −1 , yielding a remarkable power factor of 179.8 μW m −1 K −2 among organic thermoelectric fibers. PEDOT fiber-based radiation-modulated nonwoven fabric device generates an in-plane temperature gradient of 20 K under sunlight (0.84 sun), enabling continuous solar thermoelectric energy harvesting for powering wearable microelectronics.