Organic solar cell acceptor material based on benzothiazole non-condensed ring A-D-A '-D-A type and preparation method and application thereof

By designing benzothiazole non-fused ring AD-A'-DA type organic solar cell acceptor materials, the optical absorption range is broadened and the energy level matching is improved, solving the problems of limited light absorption range and complex fabrication in existing technologies, and realizing high-efficiency and stable organic solar cell devices.

CN121991099APending Publication Date: 2026-05-08GUANGDONG UNIV OF TECH
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Patent Information

Application Number
CN202610136066.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-30
Publication Date
2026-05-08

AI Technical Summary

Technical Problem

Existing ADA-type organic solar cell acceptor materials suffer from problems such as limited light absorption range, high carrier recombination rate, complex preparation process, and difficulty in large-scale production.

Method used

Organic solar cell acceptor materials based on the benzothiazole non-fused ring AD-A'-DA type were used. By introducing different atoms into the benzothiazole structural units and end groups, the electronic structure of the material was modulated, the optical absorption range was broadened and the energy level matching was improved. A simple synthesis route and purification process were adopted.

Benefits of technology

It achieves a broadening of the optical absorption range, improves device performance, uses readily available and simple materials for synthesis, has a high yield, is suitable for large-scale production, and the device efficiency can reach 10.89%.

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Abstract

The invention discloses a benzothiazole non-condensed ring A-D-A '-D-A type organic solar cell acceptor material and a preparation method and application thereof, a benzothiazole unit is used as a central nuclear electron withdrawing unit (A-unit), and then the benzothiazole unit, the central nuclear electron withdrawing unit (A-unit), an electron donating unit (D-unit) and a terminal group are synthesized into the organic solar cell acceptor material with an A-D-A'-D-A structure. Wherein benzothiazole as an asymmetric central core structure can enhance the dipole moment of molecules, optimize the accumulation among the molecules and improve the blending property of a donor and an acceptor, and the characteristics can jointly promote charge transfer to inhibit the bimolecular recombination condition. The molecular morphology is regulated and controlled by connecting different structural groups to a top branched chain, and meanwhile, different atoms can be introduced into a benzene ring to regulate and control the chemical energy level. In addition, the polymer also has the characteristics that the aggregation behavior and the light absorption range of molecules can be adjusted by accessing different terminal groups. The benzothiazole-based non-fused ring A-D-A '-D-A type acceptor material provided by the invention is few in synthesis and preparation steps, simple in purification process and high in yield.
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