Abstract
Thermoelectric (TE) materials are crucial for the efficient conversion of thermal energy into electrical energy, with broad applications in harvesting waste or low-grade heat, localized cooling, sensing, and wearable electronics. To date, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is one of the most widely studied system in organic and composite TE materials. In this review, we focus on the latest advancements in the preparation, mechanisms and applications of PEDOT:PSS-based TE composite films. First, we provide an outline of the background and historical development of TE materials. Then, we systematically summarize the preparation techniques. After that, strategies for enhancing TE performance and the in-depth mechanism of structure-TE performance relation are discussed. Subsequently, we discuss the TE and mechanical properties. Finally, we emphasize the recent progress in applications of power generation, sensing, and wearable technologies. In the conclusion, we discuss the future outlook and the challenges.
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