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Comparison of Two D-A Type Polymers with Each Being Fluorinated on D and A Unit for High Performance Solar Cells

机译：两种D-A型聚合物分别在D和A单元上氟化的高性能太阳能电池的比较

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摘要

For the purpose of investigating the effect of fluorination position on D-A type conjugated polymer on photophysical and photovoltaic properties, two types of fluorinated polymere are synthesized, HF with fluorination on electron-donating unit and FH with fluorination on electron-accepting unit. Compared to non-fluorinated polymer, fluorinated polymers exhibit deeper HOMO energy levels without change of bandgap and stronger vibronic shoulder in UV-visible absorption, indicating that fluorination enhances intermolecular interaction. HF with fluorinated D unit exhibits well-developed fibril network, low bimolecular recombination and high hole mobility, which lead a high PCE of 7.10% in conventional single-junction solar cells, which is higher than the PCE (6.41%) of FH with fluorinated A unit. Therefore, this result demonstrates that fluorination on electron-donating unit in D-A polymers could be a promising strategy for achieving high performance polymer solar cells.
机译：为了研究氟化位置对D-A型共轭聚合物的光物理和光电性能的影响，合成了两种类型的氟化聚合物，即在给电子单元上氟化的氟化氢和在电子接受单元上氟化的氟化氢。与非氟化聚合物相比，氟化聚合物表现出更深的HOMO能级，而没有带隙变化，并且在紫外线可见吸收中具有更强的振动肩，表明氟化作用增强了分子间的相互作用。带有氟化D单元的HF表现出发达的原纤维网络，低双分子重组和高空穴迁移率，这导致常规单结太阳能电池的PCE高达7.10％，高于氟化FH的PCE（6.41％）一个单位。因此，该结果证明D-A聚合物中电子给体单元上的氟化可能是实现高性能聚合物太阳能电池的有前途的策略。

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  • 来源
    《Advanced Functional Materials》 |2015年第1期|120-125|共6页
  • 作者

    Jea Woong Jo; Seunghwan Bae; Feng Liu; Thomas P. Russell; Won Ho Jo;

  • 作者单位

    Department of Materials Science and Engineering Seoul National University 1, Gwanak-ro, Gwanak-gu, Seoul 151-744, Korea;

    Department of Materials Science and Engineering Seoul National University 1, Gwanak-ro, Gwanak-gu, Seoul 151-744, Korea;

    Department of Polymer Science and Engineering University of Massachusetts Amherst, MA 01003, USA;

    Department of Polymer Science and Engineering University of Massachusetts Amherst, MA 01003, USA;

    Department of Materials Science and Engineering Seoul National University 1, Gwanak-ro, Gwanak-gu, Seoul 151-744, Korea;

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