Integrated manufacturing of REciclable multi-material COmposites for the TRANSport sector
Structure and Doping Optimization of IDT-Based Copolymers for Thermoelectrics
?-conjugated backbones play a fundamental role in determining the thermoelectric (TE) properties of organic semiconductors. Understanding the relationship between the structure–property–function can help us screen valuable materials. In this study, we designed and synthesized a series of conjugated copolymers (P1, P2, and P3) based on an indacenodithiophene (IDT) building block. A copolymer (P3) with an alternating donor–acceptor (D-A) structure exhibits a narrower band gap and higher carrier mobility, which may be due to the D-A structure that helps reduce the charge carrier transport obstacles. In the end, its power factor reaches 4.91 ?W m?1 K?2 at room temperature after doping, which is superior to those of non-D-A IDT-based copolymers (P1 and P2). These results indicate that moderate adjustment of the polymer backbone is an effective way to improve the TE properties of copolymers.
» Author: Tongchao Liu
» Reference: doi: 10.3390/polym12071463
» Publication Date: 30/06/2020
This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement Nº 768737
