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TiO2 hierarchical pores/nanorod arrays composite film as photoanode for quantum dot-sensitized solar cells

         

摘要

Power conversion efficiency (PCE) of quantum dot-sensitized solar cells (QDSSCs) was boosted in a TiO2 composite film (TCSF) with delicate design in structure where TiO2 hierarchical porous film (THPF) situ-ated on the top of TiO2 nanorod arrays film (TNAF). In this case, TNAF could supply efficient scattering centers for high light harvesting and direct electrical pathways for fast electron transfer while the THPF could offer porous channels for loading high quantity of previously synthetized quantum dots (QDs) and facilitate the penetration of electrolyte. Meanwhile, in this specific configuration, the presence of anatase– rutile heterojunction at the interface could help the rutile TNAF layer to efficiently collect photo-injected electrons from the anatase THPF layer thus suppressing the recombination of electrons and holes in elec-trolyte. The results showed that the PCE of QDSSC based on the TNAF photoanode was about 1.4-fold higher (η= 3.05%, Jsc = 15.86 mA cm^-2, Voc = 0.602 V, FF = 0.319) than that of device based on pure THPF (η= 2.20%, Jsc = 13.82 mA cm^-2, Voc = 0.572 V, FF = 0.278).

著录项

  • 来源
    《能源化学:英文版》 |2019年第3期|P.1-7|共7页
  • 作者单位

    [1]The State Key Laboratory of Refractories and Metallurgy;

    Wuhan University of Science and Technology;

    Wuhan 430081;

    Hubei;

    China;

    [1]The State Key Laboratory of Refractories and Metallurgy;

    Wuhan University of Science and Technology;

    Wuhan 430081;

    Hubei;

    China;

    [1]The State Key Laboratory of Refractories and Metallurgy;

    Wuhan University of Science and Technology;

    Wuhan 430081;

    Hubei;

    China;

    [1]The State Key Laboratory of Refractories and Metallurgy;

    Wuhan University of Science and Technology;

    Wuhan 430081;

    Hubei;

    China;

    [1]The State Key Laboratory of Refractories and Metallurgy;

    Wuhan University of Science and Technology;

    Wuhan 430081;

    Hubei;

    China;

    [1]The State Key Laboratory of Refractories and Metallurgy;

    Wuhan University of Science and Technology;

    Wuhan 430081;

    Hubei;

    China;

  • 原文格式 PDF
  • 正文语种 CHI
  • 中图分类 物理学;
  • 关键词

    Hierarchical pores; Nanorod arrays; Composite photoanode; Quantum dot-sensitized solar cells;

    机译:分层孔隙;纳米棒阵列;复合光阳极;量子点敏化太阳能电池;
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