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A Small Molecule Non-fullerene Electron Acceptor for Organic Solar Cells

机译：用于有机太阳能电池的小分子非富勒烯电子受体

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摘要

Organic bulk heterojunction photovoltaic devices predominantly use the fullerene derivatives [C60]PCBM and [C70]PCBM as the electron accepting component. This report presents a new organic electron accepting small molecule 2-[{7-(9,9-di-n-propyl-9H-fluoren-2-yl)benzo[c][1,2,5]thiadiazol-4-yl}methylene]malononitrile (K12) for organic solar cell applications. It can be processed by evaporation under vacuum or by solution processing to give amorphous thin films and can be annealed at a modest temperature to give films with much greater order and enhanced charge transport properties. The molecule can efficiently quench the photoluminescence of the donor polymer poly(3-n-hexylthiophene-2,5-diyl) (P3HT) and time resolved microwave conductivity measurements show that mobile charges are generated indicating that a truly charge separated state is formed. The power conversion efficiencies of the photovoltaic devices are found to depend strongly on the acceptor packing. Optimized K12:P3HT bulk heterojunction devices have efficiencies of 0.73±0.01% under AM1.5G simulated sunlight. The efficiencies of the devices are limited by the level of crystallinity and nanoscale morphology that was achievable in the blend with P3HT.
机译：有机体异质结光伏器件主要使用富勒烯衍生物[C60] PCBM和[C70] PCBM作为电子接受组分。这份报告提出了一种新的有机电子接受小分子2-[{{7-（9,9-二正丙基-9H-芴-2-基）苯并[c] [1,2,5]噻二唑-4- yl}亚甲基]丙二腈（K12）用于有机太阳能电池。可以通过在真空下蒸发或通过固溶处理来处理它，以得到无定形的薄膜，并且可以在适当的温度下对其进行退火，以得到具有更高阶数和增强的电荷传输性能的膜。该分子可以有效地淬灭供体聚合物聚（3-n-己基噻吩-2,5-二基）（P3HT）的光致发光，并且时间分辨的微波电导率测量表明产生了移动电荷，表明形成了真正的电荷分离状态。发现光伏装置的功率转换效率主要取决于受体的堆积。经过优化的K12：P3HT本体异质结器件在AM1.5G模拟阳光下的效率为0.73±0.01％。器件的效率受到与P3HT的共混物中可达到的结晶度和纳米级形貌水平的限制。

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  • 来源
    《Advanced energy materials》 |2011年第1期|1-9|共9页
  • 作者

    Paul E. Schwenn; Ke Gui; Alexandre M. Nardes; Karsten B. Krueger; Kwan H. Lee; Karyn Mutkins; Halina Rubinstein-Dunlop; Paul E. Shaw; Nikos Kopidakis; Paul L. Burn; Paul Meredith;

  • 作者单位

    Centre for Organic Photonics Electronics The University of Queensland Brisbane QLD 4072 Australia;

    Centre for Organic Photonics Electronics The University of Queensland Brisbane QLD 4072 Australia;

    National Renewable Energy Laboratory 1617 Cole Blvd Golden CO 80401 USA;

    Centre for Organic Photonics Electronics The University of Queensland Brisbane QLD 4072 Australia;

    Centre for Organic Photonics Electronics The University of Queensland Brisbane QLD 4072 Australia;

    Centre for Organic Photonics Electronics The University of Queensland Brisbane QLD 4072 Australia;

    School of Mathematics and Physics The University of Queensland Brisbane QLD 4072 Australia;

    Centre for Organic Photonics Electronics The University of Queensland Brisbane QLD 4072 Australia;

    National Renewable Energy Laboratory 1617 Cole Blvd Golden CO 80401 USA;

    Centre for Organic Photonics Electronics The University of Queensland Brisbane QLD 4072 Australia;

    Centre for Organic Photonics Electronics The University of Queensland Brisbane QLD 4072 Australia;

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

    photovoltaic devices; organic electronics; n-type organic semiconductors; organic electron acceptors;

    机译：光电器件;有机电子学;n型有机半导体;有机电子受体;

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