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首页> 外文期刊>RSC Advances >Decoupling the optical and electrical properties of subphthalocyanine/C-70 bi-layer organic photovoltaic devices: improved photocurrent while maintaining a high open-circuit voltage and fill factor
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Decoupling the optical and electrical properties of subphthalocyanine/C-70 bi-layer organic photovoltaic devices: improved photocurrent while maintaining a high open-circuit voltage and fill factor

机译：去耦亚酞菁/ C-70双层有机光伏器件的光学和电性能：改善光电流，同时保持高开路电压和填充因子

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摘要

We demonstrate a simple method for achieving high-performance subphthalocyanine (SubPc)/C-70 bi-layer organic photovoltaic (OPV) devices through the changing of the C-70 thickness. The optical and electrical properties of the OPV devices were decoupled and could be individually manipulated to obtain a significantly increased short-circuit current density (J(SC)) without reducing the open-circuit voltage and the fill factor. The thickness-independent electrical property of the C-70 layer was systematically studied in terms of the dark currents of the OPV devices and the carrier mobilities of the organic layers; the results indicate that the considerable difference in mobility between SubPc and C-70 is not detrimental, while the optical-field distribution can be optimized by tuning the C-70 thickness. The power conversion efficiency was improved from 2.7 to 4.2% by optimizing the C-70 thickness. The optical effect upon the change in the C-70 thickness was thoroughly investigated by calculating the optical-field profile and the power dissipation inside the OPV devices on the basis of the transfer matrix method. The calculated results suggest that the optical-field intensity is insufficient in predicting the trend in JSC. Instead, the power dissipation involving the absorption properties of materials and the optical-field distribution of OPV devices can provide deeper insight into the optical condition and indicates the importance of optimizing the film thickness in bi-layer OPV devices.
机译：我们证明用于实现高性能的亚酞菁（SubPc）/ C-70的双层有机光伏（OPV）通过C-70厚度的变化的设备的简单方法。 OPV器件的光学和电学性质去耦，并且可以单独操作，以获得一个显著增加短路电流密度（j（SC））而不会降低开路电压和填充因子。在C-70层的厚度无关的电特性进行了系统研究在OPV器件和有机层的载流子迁移的暗电流的条款;结果表明，在SubPc和C-70之间的移动性的相当大的差异不是有害的，而光场分布可以通过调节C-70厚度进行优化。功率转换效率被优化C-70厚度从2.7至4.2％的提高。当在C-70厚度的变化的光学效果充分通过计算传输矩阵方法的基础上的OPV器件内部的光学视场外形和功率耗散的影响。所计算出的结果表明，该光场强度是在预测JSC的趋势不充分。相反，涉及材料的吸收性能和OPV器件的光场分布中的功率耗散可以提供更深入洞察光学条件，并且指示在优化双层OPV器件的膜厚度的重要性。

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  • 来源
    《RSC Advances》 |2015年第8期|共10页
  • 作者

    Lee Chih-Chien; Su Wei-Cheng; Shu Yi-Sheng; Chang Wen-Chang; Huang Bo-Yao; Lee Ya-Ze; Su Tsung-Hao; Chen Kuan-Ting; Liu Shun-Wei;

  • 作者单位

    Natl Taiwan Univ Sci &

    Technol Dept Elect Engn Taipei 10607 Taiwan;

    Natl Taiwan Univ Sci &

    Technol Dept Elect Engn Taipei 10607 Taiwan;

    Ming Chi Univ Technol Dept Elect Engn New Taipei City 24301 Taiwan;

    Natl Taiwan Univ Sci &

    Technol Dept Elect Engn Taipei 10607 Taiwan;

    Natl Taiwan Univ Sci &

    Technol Dept Elect Engn Taipei 10607 Taiwan;

    Ming Chi Univ Technol Dept Elect Engn New Taipei City 24301 Taiwan;

    Ming Chi Univ Technol Dept Elect Engn New Taipei City 24301 Taiwan;

    Natl Taiwan Univ Sci &

    Technol Dept Elect Engn Taipei 10607 Taiwan;

    Ming Chi Univ Technol Dept Elect Engn New Taipei City 24301 Taiwan;

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