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首页> 外文期刊>Advanced energy materials >Alkyl-Chain Branching of Non-Fullerene Acceptors Flanking Conjugated Side Groups toward Highly Efficient Organic Solar Cells
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Alkyl-Chain Branching of Non-Fullerene Acceptors Flanking Conjugated Side Groups toward Highly Efficient Organic Solar Cells

机译：非富勒烯受体的烷基链支化侧翼缀合的侧基朝向高效有机太阳能电池

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摘要

Side-chain modifications of non-fullerene acceptors (NFAs) are essential for harvesting their full potential in organic solar cells (OSC). Here, an effective alkyl-chain-branching approach of the Y-series NFAs flanking meta-substituted phenyl side groups at the outer positions is demonstrated. Compared to BTP-4F-PC6 with linear m-hexylphenyl chains, two new acceptors named BTP-4F-P2EH and BTP-4F-P3EH are developed with bulkier alkyl chains branched at the beta and gamma positions, respectively. These branched chains result in altered molecular packing of the NFAs and afford higher open-circuit voltage of the devices. Despite the blue-shifted absorption of the branched-chain NFAs, their blends with PBDB-T-2F enable improved short-circuit current density for the corresponding devices owing to the more suitable phase separation and better exciton dissociation. Consequently, the OSCs based on BTP-4F-P2EH and BTP-4F-P3EH yield enhanced device performance of 18.22% and 17.57%, respectively, outperforming the BTP-4F-PC6-based ones (17.22%). These results highlight that the side-chain branching design of NFAs has great potential in optimizing molecular properties and promoting photovoltaic performance.
机译：非富勒烯受体（NFAS）的侧链修饰对于收获其在有机太阳能电池（OSC）中的全部潜力是必不可少的。这里，证明了在外位置处的Y系列NFAS侧翼的有效烷基链分支方法。与具有线性M-己基苯基链的BTP-4F-PC6相比，分别在β和γ位置分支的BTP-4F-P2EH和BTP-4F-P3eh的两个新的受体分别与Bumbier烷基链分别开发。这些分支链导致NFA的改变的分子包装，并提供更高的器件的开路电压。尽管支化链NFAS的蓝相吸收，但由于相对于更合适的相分离和更好的激子解离，它们具有PBDB-T-2F的共混物能够改善相应装置的短路电流密度。因此，基于BTP-4F-P2EH和BTP-4F-P3EH的OSC分别产生的增强装置性能为18.22％和17.57％，优于基于BTP-4F-PC6的（17.22％）。这些结果突出显示NFA的侧链支化设计在优化分子特性和促进光伏性能方面具有很大的潜力。

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  • 来源
    《Advanced energy materials》 |2021年第47期|2102596.1-2102596.10|共10页
  • 作者

    Zhang Jianquan; Bai Fujin; Angunawela Indunil; Xu Xiaoyun; Luo Siwei; Li Chao; Chai Gaoda; Yu Han; Chen Yuzhong; Hu Huawei; Ma Zaifei; Ade Harald; Yan He;

  • 作者单位

    Hong Kong Univ Sci & Technol Guangdong Hong Kong Macao Joint Lab Optoelect & M Clear Water Bay Kowloon Hong Kong 999077 Peoples R China|Hong Kong Univ Sci & Technol Hong Kong Branch Clear Water Bay Kowloon Chinese Natl Engn Res Ctr Tissue Restorat & Recon Hong Kong 999077 Peoples R China;

    Hong Kong Univ Sci & Technol Guangdong Hong Kong Macao Joint Lab Optoelect & M Clear Water Bay Kowloon Hong Kong 999077 Peoples R China|Hong Kong Univ Sci & Technol Hong Kong Branch Clear Water Bay Kowloon Chinese Natl Engn Res Ctr Tissue Restorat & Recon Hong Kong 999077 Peoples R China;

    North Carolina State Univ Dept Phys Raleigh NC 27695 USA|North Carolina State Univ Organ & Carbon Elect Labs ORaCEL Raleigh NC 27695 USA;

    Donghua Univ Coll Mat Sci & Engn Ctr Adv Low Dimens Mat State Key Lab Modificat Chem Fibers & Polymer Mat Shanghai 201620 Peoples R China;

    Hong Kong Univ Sci & Technol Guangdong Hong Kong Macao Joint Lab Optoelect & M Clear Water Bay Kowloon Hong Kong 999077 Peoples R China|Hong Kong Univ Sci & Technol Hong Kong Branch Clear Water Bay Kowloon Chinese Natl Engn Res Ctr Tissue Restorat & Recon Hong Kong 999077 Peoples R China;

    Hong Kong Univ Sci & Technol Guangdong Hong Kong Macao Joint Lab Optoelect & M Clear Water Bay Kowloon Hong Kong 999077 Peoples R China|Hong Kong Univ Sci & Technol Hong Kong Branch Clear Water Bay Kowloon Chinese Natl Engn Res Ctr Tissue Restorat & Recon Hong Kong 999077 Peoples R China;

    Hong Kong Univ Sci & Technol Guangdong Hong Kong Macao Joint Lab Optoelect & M Clear Water Bay Kowloon Hong Kong 999077 Peoples R China|Hong Kong Univ Sci & Technol Hong Kong Branch Clear Water Bay Kowloon Chinese Natl Engn Res Ctr Tissue Restorat & Recon Hong Kong 999077 Peoples R China;

    Hong Kong Univ Sci & Technol Guangdong Hong Kong Macao Joint Lab Optoelect & M Clear Water Bay Kowloon Hong Kong 999077 Peoples R China|Hong Kong Univ Sci & Technol Hong Kong Branch Clear Water Bay Kowloon Chinese Natl Engn Res Ctr Tissue Restorat & Recon Hong Kong 999077 Peoples R China;

    Hong Kong Univ Sci & Technol Guangdong Hong Kong Macao Joint Lab Optoelect & M Clear Water Bay Kowloon Hong Kong 999077 Peoples R China|Hong Kong Univ Sci & Technol Hong Kong Branch Clear Water Bay Kowloon Chinese Natl Engn Res Ctr Tissue Restorat & Recon Hong Kong 999077 Peoples R China;

    Donghua Univ Coll Mat Sci & Engn State Key Lab Modificat Chem Fibers & Polymer Mat Shanghai 201620 Peoples R China;

    Donghua Univ Coll Mat Sci & Engn Ctr Adv Low Dimens Mat State Key Lab Modificat Chem Fibers & Polymer Mat Shanghai 201620 Peoples R China;

    North Carolina State Univ Dept Phys Raleigh NC 27695 USA|North Carolina State Univ Organ & Carbon Elect Labs ORaCEL Raleigh NC 27695 USA;

    Hong Kong Univ Sci & Technol Guangdong Hong Kong Macao Joint Lab Optoelect & M Clear Water Bay Kowloon Hong Kong 999077 Peoples R China|Hong Kong Univ Sci & Technol Hong Kong Branch Clear Water Bay Kowloon Chinese Natl Engn Res Ctr Tissue Restorat & Recon Hong Kong 999077 Peoples R China|Hong Kong Univ Sci & Technol Shenzhen Res Inst 9 Yuexing 1st RD Hitech Pk Shenzhen 518057 Guangdong Peoples R China|South China Univ Technol State Key Lab Luminescent Mat & Devices Inst Polymer Optoelect Mat & Devices Guangzhou 510640 Guangdong Peoples R China;

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  • 正文语种 eng
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  • 关键词

    alkyl chain branching; blend morphology control; non-fullerene acceptors; side-chain engineering;

    机译：烷基链支化;混合形态控制;非富勒烯受体;侧链工程;

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