Asymmetric chlorination of A2–A1–D–A1–A2 type non-fullerene acceptors for high-voltage organic photovoltaics

Peiqing Cong; Xianda Li; Ailing Tang; Jiang Wu; Jianhua Chen; Lie Chen; Erjun Zhou

doi:10.1039/D2CC05631C

Asymmetric chlorination of A₂–A₁–D–A₁–A₂ type non-fullerene acceptors for high-voltage organic photovoltaics†

Peiqing Cong,‡^ab Xianda Li,‡^ac Ailing Tang,

*^ab Jiang Wu,^ac Jianhua Chen,^d Lie Chen

^e and Erjun Zhou

*^ab

Author affiliations

* Corresponding authors

^a CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
E-mail: tangal@nanoctr.cn, zhouej@nanoctr.cn

^b Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

^c Henan Institutes of Advanced Technology, Zhengzhou University, Zhengzhou 450003, China

^d Department of Chemical Science and Technology, Yunnan University, Kunming 650091, China

^e College of Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang, China

Abstract

Herein, we synthesized an asymmetric A₂–A₁–D–A₁–A₂ type small molecule nonfullerene acceptor (NFA), HCl-BTA3, by chlorination on one side of A₁. The synergistic effect of the asymmetric structure and chlorination endows HCl-BTA3 with a large dipole moment, close molecular packing, and high-efficiency charge transfer and transport. After being blended with a carboxylate-based polymer donor, TTC-Cl, HCl-BTA3 achieved a high open-circuit voltage (V_OC) of 1.20 V and a satisfactory power conversion efficiency (PCE) of 11.2%, which are among the highest values for high-voltage carboxylate-based polymers.

This article is part of the themed collection: Photofunctional Materials and Transformations

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Article information

DOI: https://doi.org/10.1039/D2CC05631C
Article type: Communication
Submitted: 16 Oct 2022
Accepted: 07 Nov 2022
First published: 07 Nov 2022

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Chem. Commun., 2022,58, 13373-13376

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Asymmetric chlorination of A₂–A₁–D–A₁–A₂ type non-fullerene acceptors for high-voltage organic photovoltaics

P. Cong, X. Li, A. Tang, J. Wu, J. Chen, L. Chen and E. Zhou, Chem. Commun., 2022, 58, 13373 DOI: 10.1039/D2CC05631C

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