Issue 6, 2023

Asymmetric fluorine and chlorine side-chain engineered quinoxaline-based D–A copolymer for both fullerene and nonfullerene polymer solar cells

Abstract

In this paper, one conjugated polymer, with asymmetric side chains of alkoxy-substituted difluorobenzene and alkoxy-substituted monochlorobenzene based on quinoxaline (Qx) as the electron acceptor unit, and alkylthiothiophene benzodithiophene (BDTTS) as the electron donor unit, namely PBDTTS-2FClQx, was synthesized and employed as an electron donor polymer with a compatible dual-acceptor strategy to fabricate ternary organic solar cells (OSCs). As a consequence, the optimized ternary OSC (PBDTTS-2FClQx:Y6:PC71BM = 1 : 0.9 : 0.1) exhibited a significantly enhanced PCE of 13.59% with simultaneously increased fundamental parameters, showing about 9.5% improvement compared to the control binary PBDTTS-2FClQx:Y6 (12.41%). Moreover, the optimal ternary device showed much better stability. The excellent results demonstrate that this Qx type copolymer bearing asymmetric side-chains could be a promising donor material for constructing efficient and stable OSCs.

Graphical abstract: Asymmetric fluorine and chlorine side-chain engineered quinoxaline-based D–A copolymer for both fullerene and nonfullerene polymer solar cells

Supplementary files

Article information

Article type
Paper
Submitted
30 Aug 2022
Accepted
29 Dec 2022
First published
05 Jan 2023

Polym. Chem., 2023,14, 728-736

Asymmetric fluorine and chlorine side-chain engineered quinoxaline-based D–A copolymer for both fullerene and nonfullerene polymer solar cells

Z. Zhou, Z. Wu, Y. Xu, Y. Lu, J. Yang, W. Zhu and Y. Liu, Polym. Chem., 2023, 14, 728 DOI: 10.1039/D2PY01122K

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