Integrated manufacturing of REciclable multi-material COmposites for the TRANSport sector
High?Performance n?Type Polymeric Mixed Ionic?Electronic Conductors: The Impacts of Halogen Functionalization
Developing high?performance n?type polymer mixed ionic?electronic conductors (PMIECs) is a grand challenge, which largely determines their applications in organic electronic devices based on logic circuits and p?n junctions, such as organic electrochemical transistors (OECTs) and organic thermoelectrics (OTEs). Herein, we report two halogen?functionalized PMIECs f?BTI2g?TVTF and f?BTI2g?TVTCl built from fused bithiophene imide dimer (f?BTI2) bearing branched oligo(ethylene glycol) side chain as the acceptor unit and halogenated thienylene–vinylene–thienylene (TVT) as the donor co?unit. Compared to the control polymer f?BTI2g?TVT, the fluorinated f?BTI2g?TVTF shows lower?positioned LUMO, improved charge transport property, and greater ion uptake capacity. As a result, f?BTI2g?TVTF delivers a state?of?the?art ?C* of 90.2 F cm?1 V?1 s?1 with a remarkable electron mobility of 0.41 cm2 V?1 s?1 in OECTs and an excellent power factor of 64.2 ?W m?1 K?2 in OTEs, higher than those of f?BTI2g?TVTCl and parent f?BTI2g?TVT. Using f?BTI2g?TVTF, we further demonstrate an OECT?based inverter amplifier with voltage gain up to 148 V V?1, which is among the highest values for OECT inverters. Such results shed light on the impacts of halogen atoms for developing high?performing n?type PMIECs and pave the way for realizing highly efficient n?type OECT and OTE devices.This article is protected by copyright. All rights reserved
» Publication Date: 12/08/2023
This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement Nº 768737
