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首页> 外文期刊>Physical chemistry chemical physics: PCCP >Surface-charge accumulation effects on open-circuit voltage in organic solar cells based on photoinduced impedance analysis
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Surface-charge accumulation effects on open-circuit voltage in organic solar cells based on photoinduced impedance analysis

机译：基于光诱导阻抗分析的有机太阳能电池开路电压的表面电荷累积效应

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摘要

The accumulation of dissociated charge carriers plays an important role in reducing the loss occurring in organic solar cells. We find from light-assisted capacitance measurements that the charge accumulation inevitably occurred at the electrode and photovoltaic layer interface for bulk-heterojunction ITO/PEDOT:PSS/P3HT:PCBM/Ca/Al solar cells. Our results indicate, for the first time through impedance measurements, that the charge accumulation exists at the anode side of the device, and more importantly, we successfully identify the type of charge accumulated. Further study shows that the charge accumulation can significantly affect open circuit voltage and short circuit current. As a result, our experimental results from light assisted capacitance measurements provide a new understanding of the loss in open-circuit voltage and short-circuit photocurrent based on charge accumulation. Clearly, controlling charge accumulation presents a new mechanism to improve the photovoltaic performance of organic solar cells.
机译：解离电荷载体的积累在减少有机太阳能电池中发生的损失方面发挥着重要作用。我们发现光辅电容测量，即用于散装 - 异位结ITO / PETO / PETO / PECOT的电极和光伏层界面处的电荷累积，PSS / P3HT：PCBM / CA / Al太阳能电池。我们的结果表明，首次通过阻抗测量来表示，在设备的阳极侧存在电荷累积，更重要的是，我们成功地识别累积的电荷类型。进一步的研究表明，电荷累积可以显着影响开路电压和短路电流。结果，我们的实验结果来自光辅助电容测量，对基于电荷累积的开路电压和短路光电流的损耗提供了新的了解。清楚地，控制电荷累积提高了改善有机太阳能电池的光伏性能的新机制。

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    Huidong Zang; Yu-Che Hsiao; Bin Hu;

  • 作者单位

    Department of Materials Science and Engineering University of Tennessee Knoxville 37996 USA.;

    Department of Materials Science and Engineering University of Tennessee Knoxville 37996 USA.;

    Department of Materials Science and Engineering University of Tennessee Knoxville 37996 USA.;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 物理学;化学;
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