Abstract The present work demonstrates a totally radical change in conduction nature from typical p-type to n-type through ionic transport in FeCl3 doped free-standing poly(3-hexylthiophene) (P3HT) films. The thermodiffusion of Cl− ions generated a giant negative Seebeck coefficient (∼2.7 mV/K) and a moderately high electrical conductivity (∼1 S/cm); an unprecedented level in polymers. A thermoelectric power generator fabricated using these P3HT films delivered an output electrical power of 25 μW with open circuit voltage of 128 mV for a ΔT of 46 °C. Though continuous operation reduced the output power due to inability of the ions to pass through the interface between doped P3HT and metallic contact, yet the generated voltage was found to be quite stable over a period of 1 h under load. With such a high n-type Seebeck coefficient, free-standing P3HT films show a great potential for energy harvesting from intermittent heat sources as well as in supercapacitor charging for futuristic energy storage devices.

中文翻译：

---

掺杂聚（3-己基噻吩）自支撑薄膜中阴离子传导介导的巨 n 型塞贝克系数

摘要 目前的工作证明了通过 FeCl3 掺杂的独立聚（3-己基噻吩）（P3HT）薄膜中的离子传输，传导性质从典型的 p 型到 n 型发生了彻底的变化。Cl− 离子的热扩散产生了巨大的负塞贝克系数（~2.7 mV/K）和中等高的电导率（~1 S/cm）；聚合物的前所未有的水平。使用这些 P3HT 薄膜制造的热电发电机提供 25 μW 的输出电功率，开路电压为 128 mV，ΔT 为 46 °C。尽管由于离子无法通过掺杂的 P3HT 和金属触点之间的界面，连续运行降低了输出功率，但发现产生的电压在负载下 1 小时内非常稳定。如此高的n型塞贝克系数，