Abstract Since the late ’80s, a highly stable conductive polymer has been developed, that is poly(3,4-ethylene dioxythiophene), also known as PEDOT. Its increasing conductivity throughout the years combined with its intrinsic stability have aroused great attention both in the academic and industrial fields. The growing importance of PEDOT, can be easily acknowledged through the numerous applications in thermoelectricity, photovoltaics, lighting, sensing, technical coatings, transparent electrodes, bioelectronics, and so forth. Although its high electrical conductivity is strongly established in the literature, the wide range of data shows that disorder, as the limiting factor in charges’ transport, hinders the design of materials with optimal performances. The aim of this article is to review and discuss recent progresses dealing with the electrical conductivity and transport properties in PEDOT materials, with special attention on morphological and structural features. Particular emphasis is given to the commercial PEDOT:PSS as well as other PEDOT-based materials stabilized with smaller counter-anions. It appears that the electrical conductivity and the transport mechanisms are closely related to the fabrication process, the crystallinity of the material and the choice of the counter-anions. With the tunable electrical properties, new functionalities appear accessible and add up to the already existing applications that are concisely highlighted.

中文翻译：

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理解基于 PEDOT 的材料的结构和传输特性的进展：批判性评论

摘要 80 年代后期，人们开发了一种高度稳定的导电聚合物，即聚(3,4-乙烯二氧噻吩)，又名PEDOT。其多年来不断增加的电导率及其固有的稳定性引起了学术和工业领域的极大关注。通过在热电、光伏、照明、传感、技术涂层、透明电极、生物电子学等领域的众多应用，可以很容易地认识到 PEDOT 日益增长的重要性。虽然其高导电性在文献中得到了有力的证实，但广泛的数据表明，作为电荷传输的限制因素的无序阻碍了具有最佳性能的材料的设计。本文的目的是回顾和讨论 PEDOT 材料中导电性和传输特性的最新进展，特别关注形态和结构特征。特别强调商业 PEDOT:PSS 以及其他用较小反阴离子稳定的基于 PEDOT 的材料。似乎导电性和传输机制与制造过程、材料的结晶度和反阴离子的选择密切相关。凭借可调节的电气特性，新功能看起来很容易访问，并且可以添加到简洁突出显示的现有应用程序中。特别强调商业 PEDOT:PSS 以及其他用较小反阴离子稳定的基于 PEDOT 的材料。似乎导电性和传输机制与制造过程、材料的结晶度和反阴离子的选择密切相关。凭借可调节的电气特性，新功能看起来很容易访问，并且可以添加到简洁突出显示的现有应用程序中。特别强调商业 PEDOT:PSS 以及其他用较小反阴离子稳定的基于 PEDOT 的材料。似乎导电性和传输机制与制造过程、材料的结晶度和反阴离子的选择密切相关。凭借可调节的电气特性，新功能看起来很容易访问，并且可以添加到简洁突出显示的现有应用程序中。