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首页> 外文期刊>Advanced energy materials >Deep Energetic Trap States in Organic Photovoltaic Devices
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Deep Energetic Trap States in Organic Photovoltaic Devices

机译：有机光伏器件中的深能陷阱态

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摘要

The nature of energetic disorder in organic semiconductors is poorly understood. In photovoltaics, energetic disorder leads to reductions in the open circuit voltage and contributes to other loss processes. In this work, three independent optoelectronic methods were used to determine the long-lived carrier populations in a high efficiency N-alkylthieno[3,4-c]pyrrole-4,6-dione (TPD) based polymer: fullerene solar cell. In the TPD co-polymer, all methods indicate the presence of a long-lived carrier population of ∼ 1015 cm−3 on timescales ≥ 100 μs. Additionally, the behavior of these photovoltaic devices under optical bias is consistent with deep energetic lying trap states. Comparative measurements were also performed on high efficiency poly-3-hexylthiophene (P3HT): fullerene solar cells; however a similar long-lived carrier population was not observed. This observation is consistent with a higher acceptor concentration (doping) in P3HT than in the TPD-based copolymer.
机译：人们对有机半导体中高能紊乱的性质了解甚少。在光伏发电中，高能紊乱会导致开路电压降低，并导致其他损耗过程。在这项工作中，使用三种独立的光电方法确定了基于N-烷基硫代[3,4-c]吡咯-4,6-二酮（TPD）的高效聚合物：富勒烯太阳能电池中的长寿命载流子。在TPD共聚物中，所有方法均表明在≥100μs的时间尺度上存在〜1015 cm-3的长寿命载流子。另外，这些光生伏打器件在光偏压下的行为与深层高能陷阱势态一致。还对高效聚-3-己基噻吩（P3HT）进行了比较测量：富勒烯太阳能电池；但是，未观察到类似的长寿命携带者种群。该观察结果与P3HT中的受主浓度（掺杂）高于基于TPD的共聚物中的受主浓度一致。

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  • 来源
    《Advanced energy materials》 |2012年第1期|1-9|共9页
  • 作者

    Christopher G. Shuttle; Neil D. Treat; Jessica D. Douglas; Jean M. J. FrÉchet; Michael L. Chabinyc;

  • 作者单位

    Materials Department University of California Santa Barbara CA 93106 United States;

    Materials Department University of California Santa Barbara CA 93106 United States;

    Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 and Department of Chemistry University of California Berkeley CA 94720-1460;

    Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 and Department of Chemistry University of California Berkeley CA 94720-1460;

    King Abdullah University of Science and Technology Thuwal Saudi Arabia 23955-6900;

    Materials Department University of California Santa Barbara CA 93106 United States;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    solar cells; disorder; trapping; charge transport; PCBM;

    机译：太阳能电池;混乱;陷阱;电荷传输;PCBM;

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