Electrostatic Tailoring of Freestanding Polymeric Films for Multifunctional Thermoelectrics, Hydrogels, and Actuators

作者：Suo Tu, Ting Tian, Jinsheng Zhang, Suzhe Liang, Guangjiu Pan, Xiaoxin Ma, Liangzhen Liu, Roland A. Fischer, Peter Müller‐Buschbaum · 发表于：ACS Nano · 年份：2024 · DOI：10.1021/acsnano.4c12502 · 被引用次数：22 · 研究领域：Advanced Sensor and Energy Harvesting Materials、Conducting polymers and applications、Organic Electronics and Photovoltaics

High Resolution Image Download MS PowerPoint Slide Organic conducting polymer poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) has garnered enormous attention in organic electronics due to its low-cost solution processability, highly tunable conductivity, superior mechanical flexibility, and good biocompatibility together with excellent atmospheric stability. Nevertheless, limited electrical properties and unfavorable water instability of pristine PEDOT:PSS film impede its further implementation in a broad spectrum of practical applications. In this work, the successful tailoring of the intrinsic electrostatic interaction within PEDOT:PSS and consequent optimized electrical properties are enabled by a simple yet effective ionic salt post-treatment strategy. The choice of zinc di[bis(trifluoromethylsulfonyl)imide] (Zn(TFSI) 2 ) not only endows the post-treated PEDOT:PSS film with high electrical properties but also other compelling characteristics, including superior water stability, excellent mechanical flexibility, and fast humidity responsiveness. Multidimensional characterizations are conducted to gain in-depth insights into the mechanisms underlying such improved performance, ranging from intermolecular interactions, polymer conformations, and doping levels to microstructural characteristics. Benefiting from these versatile properties, the as-prepared freestanding Zn(TFSI) 2 -post-treated PEDOT:PSS films can serve as promising candidates for high-perf...