Finely Tuned Electron/Hole Transport Preference of Thiazoloisoindigo-based Conjugated Polymers by Incorporation of Heavy Chalcogenophenes  

作　　者：Chen-Chen Li Miao Xiong Jia-Wei Peng Jie-Yu Wang Huan-Rui Zhang You-Bing Mu Jian Pei Xiao-Bo Wan 

机构地区：[1]Key Laboratory of Optoelectronic Chemical Materials and Devices,Ministry of Education,School of Chemical&Environmental Engineering,Jianghan University,Wuhan 430056,China [2]Beijing National Laboratory for Molecular Sciences,the Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China [3]Qingdao Institute of Bioenergy&Bioprocess Technology,Chinese Academy of Sciences,Qingdao 266101,China

出　　处：《Chinese Journal of Polymer Science》2021年第7期838-848,共11页高分子科学（英文版）

基　　金：the National Natural Science Foundation of China(Nos.22075105 and 51573204);National Science Foundation of Shandong Province(No.ZR2018ZB0315);H.Zhang thanks the financial support from the National Natural Science Foundation of China(No.51803230);Prof.J.Wang thanks the financial support from the Opening Project of Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education,Jianghan University.The authors thank Dr.Chunming Yang for GIWAXS tests and beamline BL16B1(Shanghai Synchrotron Radiation Facility)for providing beam time.

摘　　要：A series of copolymers of thiazoloisoindigo (Tzll) with different chalcogenophene trimers were synthesized to systematicllyinvestigate the chalcogen effect on their charge transport propertes.When only the middlethiophene ring of terthiphene(T-T-T)is replaced byheavier chalcogenophenes,a preference(expressed by the ratio of μe/μh)towards electron transport was observed descending from T-T-Tto T-Se-Tthen to T-Te-T(Se and Te stand for selenophene and tellurophene,respectively).On the other hand,with the increased number of heavierchalcogenophenes,a preference toward hole transport was observed descending from Se-T-Se to Se-Se-se then to Se-Te-Se.This phenomenon iswellexplained by the balance between the aromatic resonance energy of the chalcogenophenes and the electronegativity of the chalcogens.Specifically,P(TZll-T-Se-T)displayed relatively balanced ambipolar property(μh^(max)andμe^(max) of 3.77 and 1.59 cm^(2)·v^(-1)·s^(-1)with aμe/μh of 0.42).while P(Tll-Se-Te-Se)exhibited the best preference to hole transfer with a u.u,of 0.09.P(Tzll-T-Te-T)exhibited the best preference to electrontransfer with aμe/μl,of 16 and theμe^(max)of 0.64 cm^(2)·v^(-).s^(-1)which is the highest electron mobility among the known conjugated polymerscontaining tellurophenes.

关 键 词：Thiazoloisoindigo COPOLYMERS Charge transport properties Chalcogenophene trimers 

分 类 号：TQ317[化学工程—高聚物工业]