Effects of π-bridge units on the properties of donor-π-acceptor type benzodithiophene-thienothiophene based polymers for organic solar cells

被引：8
|
作者：
Shavez, Mohd [1 ]
Panda, Aditya N. [1 ]
机构：
[1] Indian Inst Technol Guwahati, Dept Chem, Gauhati 781039, India
来源：
CHEMICAL PHYSICS LETTERS | 2020年 / 756卷
关键词：
PHOTOVOLTAIC PROPERTIES; CONJUGATED POLYMERS; ELECTRON-TRANSFER; A POLYMER; PERFORMANCE; THIAZOLE; DESIGN; AGGREGATION; COPOLYMERS; MOLECULES;
D O I：
10.1016/j.cplett.2020.137810
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Conjugated donor (D)-pi-acceptor(A) cooligomers based on donor benzodithiophene(BDT) and acceptors thieno-thiophene(TT) are designed with furan, fusedthiophene, thiophene and thiazole 3t bridges. Effects of incorporation of the pi-bridges on structures and properties of oligomers and oligomer-fullerene composites are calculated and discussed. Maximum absorption wavelengths of newly designed oligomers are red shifted compared to that of the parent oligomer P1. The newly designed P2 -P5 oligomers have good light absorption efficiencies compared to that of P1. P4/PCBM and P5/PCBM blends have smaller intermolecular charge recombination rates than P1 and these two oligomers are expected to be more suitable for efficient solar cells.
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页数：8
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