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On the homocoupling of trialkylstannyl monomers in the synthesis of diketopyrrolopyrrole polymers and its effect on the performance of polymer-fullerene photovoltaic cells

机译:在二酮吡咯吡咯聚合物合成中三烷基静止单体的同性耦合及其对聚合物 - 富勒烯光伏电池性能的影响

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摘要

Homocoupling of monomers in a palladium-catalyzed copolymerization of donor-acceptor polymers affects the perfect alternating structure and may deteriorate the performance of such materials in solar cells. Here we investigate the effect of homocoupling bis(trialkylstannyl)-thiophene and -bithiophene monomers in two low band gap poly(diketopyrrolopyrrole-alt-oligothiophene) polymers by deliberately introducing extended oligothiophene defects in a controlled fashion. We find that extension of the oligothiophene by one or two thiophenes and creating defects up to at least 10% does not significantly affect the opto-electronic properties of the polymers or their photovoltaic performance as electron donor in solar cells in combination with [6,6]-phenyl C-71 butytic acid methyl ester as acceptor. By using model reactions, we further demonstrate that for the optimized synthetic protocol and palladium-catalyst system the naturally occurring defect concentration in the polymers is expected to be less than 0.5%.
机译:在钯催化的供体 - 受体聚合物的共聚中的单体的同性耦合影响了完美的交替结构,并且可以恶化太阳能电池中这些材料的性能。在这里,我们通过故意以受控方式引入延长的低聚噻吩缺陷,研究了同性环耦合双(三烷基烷基) - 噻吩和 - 噻吩单体和 - 二噻吩丙烯烯单体的影响。我们发现寡核苷酸的延伸一两个噻吩并产生高达至少10%的缺陷不会显着影响聚合物的光电性能或它们的光伏性能作为太阳能电池中的电子供体与[6,6 ] - 苯基C-71丁基酸甲酯作为受体。通过使用模型反应,我们进一步证明,对于优化的合成方案和钯 - 催化剂体系,预期聚合物中的天然存在的缺陷浓度小于0.5%。

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  • 来源
    《RSC Advances》 |2019年第28期|共12页
  • 作者单位

    Eindhoven Univ Technol Inst Complex Mol Syst Mol Mat &

    Nanosyst POB 513 NL-5600 MB Eindhoven Netherlands;

    Eindhoven Univ Technol Inst Complex Mol Syst Mol Mat &

    Nanosyst POB 513 NL-5600 MB Eindhoven Netherlands;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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