Synthesis and photovoltaic properties of the efficient polymer donor based on benzo[1,2-b:4,5-b’]difuran unit

IF 5.8 2区化学 Q1 POLYMER SCIENCE

European Polymer Journal Pub Date : 2025-01-22 DOI:10.1016/j.eurpolymj.2025.113766

Jin Luo, Lei Wang, Linglong Ye, Songting Tan

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引用次数: 0

Abstract

Benzo[1,2-b:4,5-b’]dithiophene (BDT) has been used as the electron-donating block in the majority of polymer donors which generally achieve high-performance organic solar cells (OSCs). Benzo[1,2-b:4,5-b’]difuran (BDF), with a similar structure to BDT, has attracted increasing attention because its raw materials are renewable. To diversify building blocks for high-performance donor polymers, we synthesized a new polymer donor, namely PFD, based on the BDF and benzo[1,2-c:4,5-c’]dithiophene-4,8-dione (BDD) units as the backbone with 1-(2-butyloctyl)-chlorobenzene as the side-chain. The PFD possesses a deeper highest occupied molecular orbital (HOMO) energy level of −5.54 eV, which helps to generate a high open-circuit voltage (V_oc) in OSCs. When Y6 was chosen as an acceptor, a fair V_oc of 0.867 V and a decent PCE of 16.95 % were achieved in the binary OSCs. With the addition of a small molecule acceptor BTMe-4Cl as the third component, the PCE of the PFD:Y6:BTMe-4Cl ternary device has improved to 17.58 %. The results indicate that BDF-based polymers exhibit the potential for fabricating efficient OSCs.

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来源期刊

European Polymer Journal 化学-高分子科学

CiteScore

9.90

自引率

10.00%

发文量

691

审稿时长

23 days

期刊介绍： European Polymer Journal is dedicated to publishing work on fundamental and applied polymer chemistry and macromolecular materials. The journal covers all aspects of polymer synthesis, including polymerization mechanisms and chemical functional transformations, with a focus on novel polymers and the relationships between molecular structure and polymer properties. In addition, we welcome submissions on bio-based or renewable polymers, stimuli-responsive systems and polymer bio-hybrids. European Polymer Journal also publishes research on the biomedical application of polymers, including drug delivery and regenerative medicine. The main scope is covered but not limited to the following core research areas: Polymer synthesis and functionalization • Novel synthetic routes for polymerization, functional modification, controlled/living polymerization and precision polymers. Stimuli-responsive polymers • Including shape memory and self-healing polymers. Supramolecular polymers and self-assembly • Molecular recognition and higher order polymer structures. Renewable and sustainable polymers • Bio-based, biodegradable and anti-microbial polymers and polymeric bio-nanocomposites. Polymers at interfaces and surfaces • Chemistry and engineering of surfaces with biological relevance, including patterning, antifouling polymers and polymers for membrane applications. Biomedical applications and nanomedicine • Polymers for regenerative medicine, drug delivery molecular release and gene therapy The scope of European Polymer Journal no longer includes Polymer Physics.