Acceptor-acceptor-type Organoboron Conjugated Polymers:Effect of Backbone Configuration on Thermoelectric Performance  

作　　者：Chang-Shuai Dong Bin Meng Jun Liu Li-Xiang Wang 

机构地区：[1]State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun,130022,China [2]University of Science and Technology of China,Hefei,230026,China

出　　处：《Chinese Journal of Polymer Science》2023年第1期108-116,共9页高分子科学（英文版）

基　　金：the National Natural Science Foundation of China(Nos.22075271,21625403,21875244 and 21875241);B.M.thanks the financial supports by State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences and the Jilin Scientific and Technological Development Program(No.20220508142RC).

摘　　要：The development of n-type polymer thermoelectrics lags far behind that of p-type ones in view of material diversity and performance.New structural insights into the thermoelectric performance are needed for efficient n-type polymer thermoelectric materials.Herein,we developed three acceptor-acceptor type organoboron polymers and investigated the effect of backbone configuration on thermoelectric performance.The three polymers are designed based on double B←N bridged bipyridine(BNBP)unit with monomeric thieno[3,4-c]pyrrole-4,6-dione(TPD),TPD dimer and TPD trimer as the copolymerizing units,respectively.The three polymers show similar low LUMO energy levels but different backbone configuration.Compared with the wavy backbone configuration,the pseudo-straight backbone configuration imparts the polymer with much enhanced crystallinity and electron mobility.As a result,after n-doping,the polymer with pseudo-straight configuration shows much higher electronic conductivity and power factor.We think these findings could serve as important guidelines for molecular design toward efficient n-type polymer thermoelectric materials.

关 键 词：Organoboron polymers Acceptor-acceptor type conjugated polymers n-Type polymer thermoelectrics N-DOPING 

分 类 号：O631.5[理学—高分子化学]