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首页> 外文期刊>Advanced Functional Materials >Improving the Photovoltage of Dithienopyrrole Dye-Sensitized Solar Cells via Attaching the Bulky Bis(octyloxy) biphenyl Moiety to the Conjugated π-Linker
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Improving the Photovoltage of Dithienopyrrole Dye-Sensitized Solar Cells via Attaching the Bulky Bis(octyloxy) biphenyl Moiety to the Conjugated π-Linker

机译：通过将大体积的双（辛氧基）联苯部分连接到共轭的π-连接基上提高对噻吩并吡咯染料敏化的太阳能电池的光电压

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摘要

The judicious design of 3D giant organic dye molecules to enable the formation of a porous photoactive layer on the surface of titania is one of the viable tactics to abate the adverse interfacial charge recombination in dye-sensitized solar cells (DSCs) employing outer-sphere redox couples. Here 2',6'-bis(octyloxy)-biphenyl substituted dithieno[3,2-b:2',3'-d]pyrrole segment is constructed and employed as the π-linker of a high molar absorption coefficient organic push-pull dye. With respect to its congener possessing the hexyl substituted dithieno[3,2-b:2',3'-d]pyrrole linker, the new dye can self-assemble on the surface of titania to afford a porous organic coating, which effectively slow down the kinetics of charge recombination of titania electrons with both outer-sphere tris (1,10-phenanthroline)cobalt(Ⅲ) ions and photooxidized dye molecules, improving the cell photovoltage. In addition, the diminishments of charge recombination via modulating the microstructure of interfacial functional zone can also overcompensate the disadvantageous impact of reduced light-harvesting and evoke an enhanced photocurrent output, bringing forth an efficiency improvement from 7.5% to 9.3% at the 100 mW cm~(-2), simulated AM1.5 conditions.
机译：明智地设计3D巨型有机染料分子以使其能够在二氧化钛表面上形成多孔光敏层是减少采用外层氧化还原的染料敏化太阳能电池（DSC）中不利的界面电荷重组的可行策略之一夫妻。在此构造了2'，6'-双（辛氧基）-联苯取代的二硫杂[3,2-b：2'，3'-d]吡咯链段，并将其用作高摩尔吸收系数的有机推挽结构的π-连接基。拉染料。关于其具有己基取代的二噻吩并[3,2-b：2'，3'-d]吡咯连接基的同类物，新染料可以在二氧化钛表面上自组装以提供多孔有机涂层，从而有效地减缓了降低了二氧化钛电子与外层三（1,10-菲咯啉）钴（Ⅲ）离子和光氧化染料分子的电荷复合动力学，改善了细胞的光电压。此外，通过调节界面功能区的微观结构来减少电荷复合，也可以弥补光收集减少的不利影响，并产生增强的光电流输出，从而在100 mW cm处将效率从7.5％提高到9.3％。 〜（-2），模拟AM1.5条件。

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  • 来源
    《Advanced Functional Materials》 |2013年第28期|3539-3547|共9页
  • 作者

    Ning Cai; Jing Zhang; Mingfei Xu; Min Zhang; Peng Wang;

  • 作者单位

    State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun, 130022, China;

    State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun, 130022, China;

    State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun, 130022, China;

    State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun, 130022, China;

    State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun, 130022, China;

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