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Enhanced Performance in Polymer Solar Cells by Surface Energy Control

机译：通过表面能控制增强聚合物太阳能电池的性能

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摘要

Enhanced performance of an inverted-type polymer solar cell is reported by controlling the surface energy of a zinc oxide (ZnO) buffer layer, on which a photoactive layer composed of a polymer:fullerene-derivative bulk heterojunc-tion is formed. With the approach based on a mixed self-assembled mono-layer, the surface energy of the ZnO buffer layer can be controlled between 40 mN m~(-1) and 70 mN m~(-1) with negligible changes in its work function. For the given range of surface energy the power conversion efficiency increases from 3.27% to 3.70% through enhanced photocurrents. The optimized morphology obtained by surface energy control results in the enhanced photocurrent and transmission electron microscopy analysis verifies the correlation between the surface energy and the phase morphology of the bulk heterojunction. These results demonstrate that surface energy control is an effective method for further improving the performance of polymer solar cells, with potentially important implications for other organic devices containing an interface between a blended organic active layer and a buffer or an electrode layer.
机译：据报道，通过控制氧化锌（ZnO）缓冲层的表面能可提高反向型聚合物太阳能电池的性能，在其上形成由聚合物：富勒烯衍生物的本体异质结组成的光敏层。通过基于混合自组装单层的方法，可以将ZnO缓冲层的表面能控制在40 mN m〜（-1）至70 mN m〜（-1）之间，并且其功函数的变化可以忽略不计。对于给定的表面能范围，通过提高光电流，功率转换效率从3.27％增加到3.70％。通过表面能控制获得的最佳形态可增强光电流，并且透射电子显微镜分析可验证表面能与体异质结的相形态之间的相关性。这些结果表明，表面能控制是进一步改善聚合物太阳能电池性能的有效方法，对于在混合有机活性层与缓冲层或电极层之间包含界面的其他有机器件具有潜在的重要意义。

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  • 来源
    《Advanced Functional Materials》 |2010年第24期|p.4381-4387|共7页
  • 作者

    Xavier Bulliard; Soo-Ghang Ihn; Sungyoung Yun; Yungi Kim; Dukhyun Choi; Jae-Young Choi; Min Kim; Myungsun Sim; Jong-Hwan Park; Wooing Choi; Kilwon Cho;

  • 作者单位

    Samsung Advanced Institute of Technology Samsung Electronics, Yongin 446-712, South Korea;

    Samsung Advanced Institute of Technology Samsung Electronics, Yongin 446-712, South Korea;

    Samsung Advanced Institute of Technology Samsung Electronics, Yongin 446-712, South Korea;

    Samsung Advanced Institute of Technology Samsung Electronics, Yongin 446-712, South Korea;

    Samsung Advanced Institute of Technology Samsung Electronics, Yongin 446-712, South Korea,Department of Mechanical Engineering Kyung Hee University Yongin 446-701, South Korea;

    Samsung Advanced Institute of Technology Samsung Electronics, Yongin 446-712, South Korea;

    Department of Chemical Engineering Pohang University of Science and Technology Pohang 790-784, South Korea;

    Department of Chemical Engineering Pohang University of Science and Technology Pohang 790-784, South Korea;

    Department of Chemical Engineering Pohang University of Science and Technology Pohang 790-784, South Korea;

    Samsung Advanced Institute of Technology Samsung Electronics, Yongin 446-712, South Korea;

    Department of Chemical Engineering Pohang University of Science and Technology Pohang 790-784, South Korea;

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