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首页> 外文期刊>Advanced Functional Materials >Importance of Terminal Group Pairing of Polymer Donor and Small-Molecule Acceptor in Optimizing Blend Morphology and Voltage Loss of High-Performance Solar Cells
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Importance of Terminal Group Pairing of Polymer Donor and Small-Molecule Acceptor in Optimizing Blend Morphology and Voltage Loss of High-Performance Solar Cells

机译：聚合物供体和小分子受体的末端组对优化融合形态和高性能太阳能电池电压损失的重要性

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摘要

As a variety of non-fullerene small molecule acceptors (SMAs) have been developed to improve power conversion efficiency (PCE) of organic solar cells (OSCs), the pairing of the SMAs with optimal polymer donors (P(D)s) is an important issue. Herein, a systematic investigation is conducted with the development of the SMA series, named C6OB-H, C6OB-Me, and C6OB-F, which contain distinctive terminal substituents -H, -CH3, and -F, respectively. These SMAs are paired with two P(D)s, PBDT-H and PBDT-F. Interestingly, the P-D/SMA pairs with similar terminal groups yield enhanced molecular compatibility and energetic interactions, which suppress voltage loss while improving blend morphology to enhance simultaneously the open-circuit voltage, short-circuit current, and fill factor of the OSCs. In particular, the OSC based on the PBDT-F:C6OB-F blend sharing fluorine terminal groups achieves the highest PCE of 15.2%, which outperforms those of PBDT-H:C6OB-F (10.1%) and PBDB-F:C6OB-H OSCs (11.2%). Furthermore, the PBDT-F:C6OB-F OSC maintains high PCEs with active layer thicknesses between 85 and 310 nm. In contrast, the PCE of PBDT-H:C6OB-F-based OSC already drops by 80% from 10.1% to 2.1% when the active layer thickness increases from 100 to 200 nm. This study establishes an important P-D/SMA pairing rule in terms of terminal functional groups for achieving high-performance OSC.
机译：由于各种非富勒烯小分子受体（SMA）已经开发出来提高有机太阳能电池（OSC）的电力转换效率（PCE），具有最佳聚合物供体的SMA配对（P（D））是一种重要问题。在此，随着SMA系列的开发，分别进行了SMA系列的SMA系列，命名为C6OB-H，C6Ob-ME和C6OB-F，分别进行了含有独特的末端取代基-H，-CH3和-F的SMA系列。这些SMA与两个P（d），PBDT-H和PBDT-F配对。有趣的是，具有类似终端组的P-D / SMA对产生增强的分子相容性和能量相互作用，其抑制了电压损失，同时改善了混合形态，同时增强了OSC的开口电压，短路电流和填充因子。特别地，基于PBDT-F的OSC：C6OB-F混合物共用氟末端基团的最高PCE为15.2％，这优于PBDT-H：C6OB-F（10.1％）和PBDB-F：C6OB- H OSC（11.2％）。此外，PBDT-F：C6OB-F OSC在85至310nm之间维持具有有源层厚度的高pces。相反，当主动层厚度从100至200nm增加时，PBDT-H的PCE（基于C6OB-F基OSC）已经从10.1％到2.1％下降了80％。本研究在实现高性能OSC的终端功能组方面建立了重要的P-D / SMA配对规则。

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  • 来源
    《Advanced Functional Materials》 |2021年第24期|2100870.1-2100870.11|共11页
  • 作者

    Kim Geon-U; Sun Cheng; Park Jin Su; Lee Hyun Gyeong; Lee Dongchan; Lee Jin-Woo; Kim Hyeong Jun; Cho Shinuk; Kim Yun-Hi; Kwon Soon-Ki; Kim Bumjoon J.;

  • 作者单位

    Korea Adv Inst Sci & Technol KAIST Dept Chem & Biomol Engn Daejeon 34141 South Korea;

    Gyeongsang Natl Univ Dept Chem Jinju 660701 South Korea|Res Inst Green Energy Convergence Technol RIGET Jinju 660701 South Korea;

    Korea Adv Inst Sci & Technol KAIST Dept Chem & Biomol Engn Daejeon 34141 South Korea;

    Korea Adv Inst Sci & Technol KAIST Dept Chem & Biomol Engn Daejeon 34141 South Korea;

    Univ Ulsan Dept Phys Ulsan 44610 South Korea|Univ Ulsan EHSRC Ulsan 44610 South Korea;

    Korea Adv Inst Sci & Technol KAIST Dept Chem & Biomol Engn Daejeon 34141 South Korea;

    Korea Adv Inst Sci & Technol KAIST Dept Chem & Biomol Engn Daejeon 34141 South Korea;

    Univ Ulsan Dept Phys Ulsan 44610 South Korea|Univ Ulsan EHSRC Ulsan 44610 South Korea;

    Gyeongsang Natl Univ Dept Chem Jinju 660701 South Korea|Res Inst Green Energy Convergence Technol RIGET Jinju 660701 South Korea;

    Gyeongsang Natl Univ Dept Mat Engn & Convergence Technol Jinju 660701 South Korea|Gyeongsang Natl Univ ERI Jinju 660701 South Korea;

    Korea Adv Inst Sci & Technol KAIST Dept Chem & Biomol Engn Daejeon 34141 South Korea;

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  • 正文语种 eng
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  • 关键词

    blend morphologies; molecular compatibility; non#8208; fullerene organic solar cells; terminal group pairing; voltage loss;

    机译：混合形态;分子相容性;非＆＃8208;富勒烯有机太阳能电池;终端组配对;电压损耗;

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