Conducting polymers, particularly poly (3,4-ethylenedioxithiophene): poly (styrenesulfonate) (PEDOT:PSS), have been intensively studied for thermoelectric (TE) applications, owing to their unique advantages including nontoxicity, low cost, good mechanical flexibility and low thermal conductivity. The TE properties of the conducting polymers show a strong dependence on their polymer chain conformations and chain stacking structures. In this work, one-dimensional PEDOT:PSS fibers were developed to improve the chain packing order and increase the proportions of quinoid PEDOT by the spatial confinement effect arising from the specific fiber configuration. The PEDOT:PSS fibers were produced through a continuous wet-spinning process followed by a one-step treatment with sulfuric acid. The optimized PEDOT:PSS fibers achieved a power factor of 147.8 μW m⁻¹ K⁻² with an electrical conductivity of 4029.5 S cm⁻¹ and a Seebeck coefficient of 19.2 μV K⁻¹ at room temperature. The power factor was 15 times that of a two-dimensional PEDOT:PSS film processed at the same condition. Besides, the PEDOT:PSS fibers also exhibited a high tensile strength of 389.5 MPa and a large breaking strain of 30.5%. Based on the PEDOT:PSS fibers, a prototype fibrous TE generator (TEG) was assembled. The fibrous TEG delivered an output power density of ∼0.273 μW cm⁻² using the human body heat. This work paves the way to developing high-performance organic TE materials by approaches of polymer chain modulation.

导电聚合物，特别是聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸酯（PEDOT：PSS），由于其独特的优势，包括无毒，低成本，良好的机械柔韧性和低廉性，已被广泛研究用于热电（TE）导热系数。导电聚合物的TE特性显示出对它们的聚合物链构象和链堆积结构的强烈依赖性。在这项工作中，开发了一维PEDOT：PSS纤维以通过特定纤维构型引起的空间限制效应来改善链堆积顺序并增加醌型PEDOT的比例。PEDOT：PSS纤维是通过连续的湿纺工艺生产的，然后用硫酸一步处理。经过优化的PEDOT：PSS光纤的功率因数达到147.8μWm^-1  ķ ^-2与4029.5小号cm的导电率^-1和19.2μVK的Seebeck系数^-1在室温下。功率因数是在相同条件下处理的二维PEDOT：PSS薄膜的15倍。此外，PEDOT：PSS纤维还表现出389.5 MPa的高拉伸强度和30.5％的大断裂应变。基于PEDOT：PSS纤维，组装了原型纤维TE发生器（TEG）。纤维状的TEG利用人体热量传递了约0.273μWcm ^-2的输出功率密度。这项工作为通过聚合物链调节方法开发高性能有机TE材料铺平了道路。