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首页> 外文期刊>Advanced energy materials >Polythiophene:Perylene Diimide Solar Cells – the Impact of Alkyl-Substitution on the Photovoltaic Performance
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Polythiophene:Perylene Diimide Solar Cells – the Impact of Alkyl-Substitution on the Photovoltaic Performance

机译：聚噻吩：Per二酰亚胺太阳能电池–烷基取代对光伏性能的影响

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摘要

The photovoltaic parameters, i.e., the short-circuit current, open-circuit voltage and device fill factor, of bulk heterojunction solar cells that use perylene diimide (PDI) derivatives as electron acceptors are often far below the theoretically expected values for reasons still not entirely understood. This article demonstrates that the photovoltaic characteristics of blend films of regioregular poly(3-hexylthiophene) (rr-P3HT) and PDI molecules are improved upon using a core-alkylated PDI derivative instead of the often used N-alkylated PDI molecules. A doubling of the power conversion efficiency of P3HT:PDI solar cells by using the core-alkylated PDI derivative is observed leading to an unprecedented power conversion efficiency of 0.5% for a P3HT:PDI solar cell under AM1.5 solar illumination. Furthermore, the optical properties of the novel PDI derivative are compared to two standard exclusively N-alkylated PDI derivatives by steady-state and time-resolved photoluminescence spectroscopy in solution and solid state. The experiments reveal that aggregation in the solid state determines the photophysics of all PDI derivatives. However, the emission energy and excited state lifetime of the aggregates are clearly influenced by the alkyl-substitution pattern through its effect on the packing of the PDI molecules. X-ray diffraction experiments before and after thermal annealing of PDI:polystyrene and PDI:P3HT blends reveal subtle differences in the packing characteristics of the different PDI derivatives and, problematically, that P3HT ordering is suppressed by all of the PDI derivatives.
机译：使用per二酰亚胺（PDI）衍生物作为电子受体的体相异质结太阳能电池的光伏参数，即短路电流，开路电压和器件填充因子，通常仍远低于理论预期值，原因仍然不完全了解。本文证明，使用核心烷基化的PDI衍生物代替常用的N-烷基化的PDI分子，可以改善区域规则的聚（3-己基噻吩）（rr-P3HT）和PDI分子的共混膜的光伏特性。通过使用核心烷基化的PDI衍生物，P3HT：PDI太阳能电池的功率转换效率提高了一倍，从而在AM1.5太阳光照下，P3HT：PDI太阳能电池的功率转换效率达到了空前的0.5％。此外，通过在溶液和固态下的稳态和时间分辨光致发光光谱，将新型PDI衍生物的光学性质与两种标准的仅由N-烷基化的PDI衍生物进行了比较。实验表明，固态聚集决定了所有PDI衍生物的光物理性质。但是，聚集体的发射能和激发态寿命明显受烷基取代模式的影响，这是通过其对PDI分子堆积的影响来实现的。在PDI：聚苯乙烯和PDI：P3HT共混物进行热退火之前和之后的X射线衍射实验表明，不同PDI衍生物的堆积特性之间存在细微的差异，而且有问题的是，所有PDI衍生物均会抑制P3HT有序化。

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  • 来源
    《Advanced energy materials》 |2011年第2期|1-6|共6页
  • 作者

    Valentin Kamm; Glauco Battagliarin; Ian A. Howard; Wojciech Pisula; Alexey Mavrinskiy; Chen Li; Klaus MÜllen; FrÉdÉric Laquai;

  • 作者单位

    Max Planck Research Group for Organic Optoelectronics Max Planck Institute for Polymer Research Ackermannweg 10 Fax: (+)49 6131 379 100;

    Synthetic Chemistry Group Max Planck Institute for Polymer Research Ackermannweg 10;

    Max Planck Research Group for Organic Optoelectronics Max Planck Institute for Polymer Research Ackermannweg 10 Fax: (+)49 6131 379 100;

    Synthetic Chemistry Group Max Planck Institute for Polymer Research Ackermannweg 10;

    Synthetic Chemistry Group Max Planck Institute for Polymer Research Ackermannweg 10;

    Synthetic Chemistry Group Max Planck Institute for Polymer Research Ackermannweg 10;

    Synthetic Chemistry Group Max Planck Institute for Polymer Research Ackermannweg 10;

    Max Planck Research Group for Organic Optoelectronics Max Planck Institute for Polymer Research Ackermannweg 10 Fax: (+)49 6131 379 100;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Bulk Heterojunction; Conjugated Polymers; Organic Solar Cells; Perylene Diimide; Poly(3-hexylthiophene);

    机译：本体异质结;共轭聚合物;有机太阳能电池;Per二酰亚胺;聚（3-己基噻吩）;

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