Synergistic Hybridization of Conjugated Polymer and Carbon Nanotube for Highly Conductive Platform and its Thermoelectric Application
발표자
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초록
내용
Doping of conjugated polymers (CPs) is promising strategy to obtain solution-processable and highly conductive films. however the improvement in electrical conductivity is limited owing to the relatively poor carrier mobility of CPs. Herein, a CP with excellent molecular doping ability, PIDF-BT, is wrapped onto the surface of single walled carbon nanotubes (SWCNT). The resulting PIDF-BT@SWCNT achieves excellent solution dispersibility and a high electrical conductivity of over 5000 S cm-1. through AuCl3 doping. The doping mechanism is studied using spectroscopic analysis, and the 4-probe field-effect transistor based on the doped PIDF-BT@SWCNT confirms a carrier mobility up to 138cm2V-1s-1. The carrier-transfer barrier energy is related to the Schottky barrier between the SWCNT and PIDF-BT, which can be controlled by doping. the highly conductive doped PIDF-BT@SWCNT enables a thermoelectric device to achieve a power factor surpassing 210 μWm-1K-2.