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首页> 外文期刊>Advanced Functional Materials >Influence of Molecular Geometry of Perylene Diimide Dimers and Polymers on Bulk Heterojunction Morphology Toward High-Performance Nonfullerene Polymer Solar Cells
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Influence of Molecular Geometry of Perylene Diimide Dimers and Polymers on Bulk Heterojunction Morphology Toward High-Performance Nonfullerene Polymer Solar Cells

机译：ylene二酰亚胺二聚体和聚合物的分子几何形状对高性能非富勒烯聚合物太阳能电池本体异质结形态的影响

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摘要

In this study, we investigate the influence of molecular geometry of the donor polymers and the perylene diimide dimers (di-PDIs) on the bulk heterojunction (BHJ) morphology in the nonfullerene polymer solar cells (PSCs). The results reveal that the pseudo 2D conjugated poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b;4,5-b]dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno[3,4-b]thiophene-)-2-carboxylate-2-6-diyl)] (PTB7-Th) has better miscibility with both bay-linked di-PDI (B-di-PDI) and hydrazine-linked di-PDI (H-di-PDI) compared to its 1D analog, poly[[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b]dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl]] (PTB7), to facilitate more efficient exciton dissociation in the BHJ films. However, the face-on oriented - stacking of PTB7-Th is severely disrupted by the B-di-PDI due to its more flexible structure. On the contrary, the face-on oriented - stacking is only slightly disrupted by the H-di-PDI, which has a more rigid structure to provide suitable percolation pathways for charge transport. As a result, a very high power conversion efficiency (PCE) of 6.41% is achieved in the PTB7-Th:H-di-PDI derived device. This study shows that it is critical to pair suitable polymer donor and di-PDI-based acceptor to obtain proper BHJ morphology for achieving high PCE in the nonfullerene PSCs.
机译：在这项研究中，我们调查了供体聚合物和the二酰亚胺二聚体（di-PDI）的分子几何形状对非富勒烯聚合物太阳能电池（PSC）中本体异质结（BHJ）形态的影响。结果表明伪二维共轭共聚[4,8-双（5-（2-（乙基乙基己基）噻吩-2-基）苯并[1,2-b; 4,5-b]二噻吩-2,6-二基-alt-（4-（2-乙基己基）-3-氟噻吩并[3,4-b]噻吩-）-2-羧酸酯-2-6-二基）]（PTB7-Th）与两个Bay-link都具有更好的混溶性di-PDI（B-di-PDI）和肼基联结的di-PDI（H-di-PDI）与1D类似物聚[[4,8-双[（2-乙基己基）氧基]苯并[1， 2-b：4,5-b]二噻吩-2,6-二基] [3-氟-2-[（2-乙基己基）羰基]噻吩并[3,4-b]噻吩二基]]（PTB7） BHJ薄膜中更有效的激子离解。但是，由于B-di-PDI的结构更加灵活，因此面向面的PTB7-Th堆叠受到严重破坏。相反，H-di-PDI只会稍微破坏面朝上的堆叠，H-di-PDI具有更刚性的结构，可为电荷传输提供合适的渗透途径。结果，在派生自PTB7-Th：H-di-PDI的设备中，实现了6.41％的非常高的功率转换效率（PCE）。这项研究表明，至关重要的是将合适的聚合物供体和基于di-PDI的受体配对以获得适当的BHJ形态，以在非富勒烯PSC中实现高PCE。

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  • 来源
    《Advanced Functional Materials》 |2015年第33期|5326-5332|共7页
  • 作者

    Wu Chen-Hao; Chueh Chu-Chen; Xi Yu-Yin; Zhong Hong-Liang; Gao Guang-Peng; Wang Zhao-Hui; Pozzo Lilo D.; Wen Ten-Chin; Jen Alex K. -Y.;

  • 作者单位

    Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA|Natl Cheng Kung Univ, Dept Chem Engn, Tainan 70101, Taiwan;

    Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA;

    Univ Washington, Dept Chem Engn, Seattle, WA 98195 USA;

    Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA;

    Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, State Key Lab Organ Solids, Beijing 100190, Peoples R China;

    Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, State Key Lab Organ Solids, Beijing 100190, Peoples R China;

    Univ Washington, Dept Chem Engn, Seattle, WA 98195 USA;

    Natl Cheng Kung Univ, Dept Chem Engn, Tainan 70101, Taiwan|Natl Cheng Kung Univ, Adv Optoelect Technol Ctr, Tainan 70101, Taiwan;

    Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    2D conjugated polymers; perylene diimide dimers; polymer solar cells; nonfullerene acceptors;

    机译：二维共轭聚合物;per二酰亚胺二聚体;聚合物太阳能电池;非富勒烯受体;

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