Lu Yannan, Islam Sheik Md Kazi Nazrul, Ahmed Al Jumlat, Liang Daniel, Loh Xianjun, Young David James
Manufacturing Research Unit, CSIRO, Research Way, Victoria, Clayton, 0810, Australia.
Faculty of Science and Technology, Charles Darwin University, Ellengowan Drive, Brinkin, Northern Territory, 0909, Australia.
Chem Asian J. 2025 Jun;20(11):e202401854. doi: 10.1002/asia.202401854. Epub 2025 Apr 28.
PSS (poly(3,4-ethylenedioxythiophene):polystyrene sulfonate) is a promising, biocompatible, thermoelectric material with (bi)polaron-type transport properties. Inexpensive, flexible thermoelectric generators based on PEDOT:PSS will have considerable commercial potential for wearable devices such as Internet of Things (IOT), biomedical sensors, even portable electronics. However, thermoelectric performance is still far from that required for practical applications due to the inharmonicity of thermoelectric parameters and a paucity of information on the relationship between molecular structure and Seebeck coefficient. This review introduces the structure-physical property relationships of PEDOT:PSS, and describes recent strategies for decoupling the apparent trade-off between electrical conductivity and Seebeck coefficient. These strategies include thermal treatment of the conductive polymer, secondary doping/dedoping optimization, hybridization, and crystal engineering. While these approaches have been successful in understanding the structure-charge transport relationship in PEDOT:PSS, they have not addressed the influence of secondary and tertiary structure on Seebeck coefficient. The purpose of this review is to provide new insights into the positive Seebeck coefficient dependence on electrical conductivity and to elucidate the independent influences and the synergetic effects of processing and post-treatment strategies.
聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PSS）是一种很有前景的生物相容性热电材料，具有（双）极化子型传输特性。基于聚3,4-乙撑二氧噻吩：聚苯乙烯磺酸盐（PEDOT:PSS）的廉价、柔性热电发电机在物联网（IOT）、生物医学传感器甚至便携式电子产品等可穿戴设备方面将具有相当大的商业潜力。然而，由于热电参数的不协调性以及分子结构与塞贝克系数之间关系的信息匮乏，热电性能仍远未达到实际应用的要求。本综述介绍了PEDOT:PSS的结构-物理性质关系，并描述了最近为消除电导率与塞贝克系数之间明显权衡所采取的策略。这些策略包括导电聚合物的热处理、二次掺杂/去掺杂优化、杂化和晶体工程。虽然这些方法在理解PEDOT:PSS中的结构-电荷传输关系方面取得了成功，但它们尚未解决二级和三级结构对塞贝克系数的影响。本综述的目的是为塞贝克系数对电导率的正相关性提供新的见解，并阐明加工和后处理策略的独立影响和协同效应。
