Highly Stretchable and Air-Stable Conjugated Polymers for Efficient Organic Thermoelectrics
발표자
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초록
내용
Poly(3,4-ethylenedioxythiophene) doped with poly(4-styrenesulfonate) (PEDOT:PSS) has been considered as a promising p-type material for wearable organic thermoelectrics (OTEs). However, PEDOT:PSS suffers from low thermoelectric power factor resulting from its low electrical conductivity (σ) and low Seebeck coefficient (S). Moreover, its insufficient mechanical stretchability limits its practical use in wearable applications. In this work, we report highly stretchable and air-stable PEDOT:PSS/ionic liquid composites for OTEs. The introduction of ionic liquid simultaneously increases the σ and S of pristine PEDOT:PSS by controlling its nanostructure and oxidation level, respectively. Furthermore, the fibrillar network formation of the composites gives rise to desired mechanical stretchability and thus, the thermoelectric functionality can be maintained up to 70% tensile strain. Our finding offers a potential of novel PEDOT:PSS/ionic liquid composites for highly deformable OTEs.