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  1. A novel n-type copolymer dopant polystyrene-polyvinyl hexylpyridinium fluoride (PSpF) with fluoride anion is designed and synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization. To our knowledge, it is the first polymeric fluoride dopant. Electrical conductivity of 4.2 S cm-1 and high power factor of 67 μW m-1 K-2 are achieved for PSpF doped polymer films, with a corresponding decrease in thermal conductivity as the PSpF concentration is increased, giving the highest ZT of 0.1. An especially high electrical conductivity of 58 S cm-1 at 88 ℃ and outstanding thermal stability were recorded. Further, organic transistors of PSpF-doped thin films exhibitmore »high electron mobility and Hall mobility of 0.86 and 1.70 cm2 V-1 s-1, respectively. The results suggest that polystyrene-polyvinyl pyridinium salt copolymers with fluoride anion are promising for high performance n-type all-polymer thermoelectrics. This work provides a new way to realize organic thermoelectrics with high conductivity relative to Seebeck coefficient, high power factor, thermal stability and broad processing window.« less
    Free, publicly-accessible full text available April 20, 2023
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