n-Type D-A Conjugated Polymers: Relationship Between Microstructure and Electrical/Mechanical Performance

Autor: Xinyu Liu, Ye Yan, Kefeng Zhao, Yanchun Han, Qiang Zhang
Rok vydání: 2021
Předmět:
Zdroj: Chemical Research in Chinese Universities. 37:1019-1030
ISSN: 2210-3171
1005-9040
DOI: 10.1007/s40242-021-1269-1
Popis: Conjugated polymers are widely applied in optoelectronic devices due to their excellent optoelectronic properties, solution processibility, and intrinsic flexibility. High-performance films could be achieved with joint efforts from both molecular structure and film solid microstructure. Herein, research progress of the relationship between microstructure and electrical/mechanical performance of poly{[N,N′-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5′-(2,2′bithiophene)}[P(NDI2OD-T2), also known as N2200], a representative of n-type donor-acceptor conjugated polymers, is reviewed. Its strong aggregation in solution is underlined and the methods to tune the degree of aggregation, such as solvent quality, molecular weight, and regioregularity, are compared. A liquid-crystalline behavior is evidenced in highly concentrated solutions during film drying, which favors the formation of highly anisotropic structures. Moreover, alignment techniques and thermal annealing are used to regulate molecular orientation and polymorphism in films. These structure characteristics offer great potential for researchers to handle film performances. Up to now, more attention has been paid to optimize the electrical performance of the devices. Achieving high-performance n-type conjugated polymer films with both superior mechanical and electrical properties is a newly emerging focus.
Databáze: OpenAIRE
Externí odkaz: