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首页> 外文期刊>Advanced energy materials >Loss Mechanisms in Thick-Film Low-Bandgap Polymer Solar Cells
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Loss Mechanisms in Thick-Film Low-Bandgap Polymer Solar Cells

机译：薄膜低带隙聚合物太阳能电池的损耗机理

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摘要

Polymer bulk heterojunction solar cells based on low bandgap polymer:fullerene blends are promising for next generation low-cost photovoltaics. While these solution-processed solar cells are compatible with large-scale roll-to-roll processing, active layers used for typical laboratory-scale devices are too thin to ensure high manufacturing yields. Furthermore, due to the limited light absorption and optical interference within the thin active layer, the external quantum efficiencies (EQEs) of bulk heterojunction polymer solar cells are severely limited. In order to produce polymer solar cells with high yields, efficient solar cells with a thick active layer must be demonstrated. In this work, the performance of thick-film solar cells employing the low-bandgap polymer poly(dithienogermole-thienopyrrolodione) (PDTC-TPD) was demonstrated. Power conversion efficiencies over 8.0% were obtained for devices with an active layer thickness of 200 nm, illustrating the potential of this polymer for large-scale manufacturing. Although an average EQE ＞ 65% was obtained for devices with active layer thicknesses ＞ 200 nm, the cell performance could not be maintained due to a reduction in fill factor. By comparing our results for PDTG-TPD solar cells with similar P3HT-based devices, we investigated the loss mechanisms associated with the limited device performance observed for thick-film low-bandgap polymer solar cells.
机译：基于低带隙聚合物：富勒烯共混物的聚合物本体异质结太阳能电池有望用于下一代低成本光伏电池。尽管这些溶液处理的太阳能电池可与大规模的卷对卷处理兼容，但用于典型实验室规模的设备的有源层太薄，无法确保高的生产良率。此外，由于薄有源层内有限的光吸收和光学干涉，所以严重限制了本体异质结聚合物太阳能电池的外部量子效率（EQE）。为了以高产量生产聚合物太阳能电池，必须证明具有厚有源层的有效太阳能电池。在这项工作中，展示了使用低带隙聚合物聚二硫代萘并二苯并吡咯二酮（PDTC-TPD）的厚膜太阳能电池的性能。对于有源层厚度为200 nm的器件，功率转换效率超过8.0％，这说明了该聚合物在大规模生产中的潜力。尽管对于有源层厚度> 200 nm的器件，平均EQE> 65％，但由于填充因子的降低，无法保持电池性能。通过比较我们的PDTG-TPD太阳能电池与类似的基于P3HT的器件的结果，我们研究了与厚膜低带隙聚合物太阳能电池观察到的受限器件性能相关的损耗机制。

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  • 来源
    《Advanced energy materials》 |2013年第7期|909-916|共8页
  • 作者

    Cephas E. Small; Sai-Wing Tsang; Song Chen; Sujin Baek; Chad M. Amb; Jegadesan Subbiah; John R. Reynolds; Franky So;

  • 作者单位

    Department of Materials Science and Engineering University of Florida Gainesville, FL 32611, USA;

    Department of Materials Science and Engineering University of Florida Gainesville, FL 32611, USA;

    Department of Materials Science and Engineering University of Florida Gainesville, FL 32611, USA;

    Department of Materials Science and Engineering University of Florida Gainesville, FL 32611, USA;

    The George and Josephine Butler Polymer Research Laboratory Department of Chemistry Center for Macromolecular Science and Engineering University of Florida Box 11 7200, Gainesville, FL 32611, USA;

    Department of Materials Science and Engineering University of Florida Gainesville, FL 32611, USA;

    School of Chemistry and Biochemistry School of Materials Science and Engineering Georgia Institute of Technology Atlanta, GA 30332-0400, USA;

    Department of Materials Science and Engineering University of Florida Gainesville, FL 32611, USA;

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