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首页> 外文期刊>Advanced Functional Materials >Enhancing the Performance of Solid-State Dye-Sensitized Solar Cells Using a Mesoporous Interfacial Titania Layer with a Bragg Stack
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Enhancing the Performance of Solid-State Dye-Sensitized Solar Cells Using a Mesoporous Interfacial Titania Layer with a Bragg Stack

机译：使用具有布拉格堆栈的介孔界面二氧化钛层提高固态染料敏化太阳能电池的性能

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摘要

High efficiency dye-sensitized solar cells (DSSCs) are fabricated with a heterostructured photoanode that consists of a 500-nm-thick organized mesoporous TiO_2 (om-TiO_2) interfacial layer (IF layer), a 7 or 10-μm thick nanocrystalline TiO_2 layer (NC layer), and a 2-μm-thick mesoporous Bragg stack (meso-BS layer) as the bottom, middle and top layers, respectively. An om-TiO_2 layer with a high porosity, transmittance, and interconnec-tivity is prepared via a sol-gel process, in which a poly(vinyl chloride)-g-poly(oxyethylene methacrylate) (PVC-g-POEM) graft copolymer is used as a structure-directing agent. The meso-BS layer with large pores is prepared via alternating deposition of om-TiO_2 and colloidal SiO2 (col-SiO_2) layers. Structure and optical properties (refractive index) of the om-TiO_2 and meso-BS layers are studied and the morphology of the heterostructured photoanode is characterized. DSSCs fabricated with the heterostructured IF/NC/BS photoanode and combined with a polymerized ionic liquid (PIL) exhibit an energy conversion efficiencies of 6.6% at 100 mW/cm~2, one of the highest reported for solid-state DSSCs and much larger than cells prepared with only a IF/NC layer (6.0%) or a NC layer (4.5%). Improvements in energy conversion efficiency are attributed to the combination of improved light harvesting, decreased resistance at the electrode/electrolyte interface, and excellent electrolyte infiltration.
机译：高效染料敏化太阳能电池（DSSC）由异质结构的光阳极制成，该阳极由500 nm厚的有组织介孔TiO_2（om-TiO_2）界面层（IF层），7或10μm厚的纳米晶体TiO_2层组成（NC层），以及2μm厚的中孔Bragg叠层（meso-BS层）分别作为底层，中间层和顶层。通过溶胶-凝胶法制备具有高孔隙率，透射率和互导性的om-TiO_2层，其中采用聚氯乙烯-g-聚甲基丙烯酸氧乙烯酯（PVC-g-POEM）接枝共聚物用作结构导向剂。通过交替沉积om-TiO_2和胶体SiO2（col-SiO_2）层来制备具有大孔的中观BS层。研究了om-TiO_2和meso-BS层的结构和光学性质（折射率），表征了异质结构光阳极的形貌。由异质结构IF / NC / BS光阳极制成的DSSC与聚合的离子液体（PIL）结合使用时，在100 mW / cm〜2的能量转换效率为6.6％，这是固态DSSC报道的最高能量之一，并且更大。比仅使用IF / NC层（6.0％）或NC层（4.5％）制备的电池。能量转换效率的提高归因于改善的光收集，降低的电极/电解质界面电阻以及出色的电解质渗透性。

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  • 来源
    《Advanced Functional Materials》 |2013年第17期|2193-2200|共8页
  • 作者

    Jung Tae Park; Jacob H. Prosser; Sung Hoon Ahn; Sang Jin Kim; Jong Hak Kim; Daeyeon Lee;

  • 作者单位

    Department of Chemical and Biomolecular Engineering University of Pennsylvania 220 South 33rd Street, Philadelphia, PA 19104, USA,Department of Chemical and Biomolecular Engineering Yonsei University 262 Seongsanno, Seodaemun-gu, Seoul 120-749, South Korea;

    Department of Chemical and Biomolecular Engineering University of Pennsylvania 220 South 33rd Street, Philadelphia, PA 19104, USA;

    Department of Chemical and Biomolecular Engineering Yonsei University 262 Seongsanno, Seodaemun-gu, Seoul 120-749, South Korea;

    Department of Chemical and Biomolecular Engineering University of Pennsylvania 220 South 33rd Street, Philadelphia, PA 19104, USA;

    Department of Chemical and Biomolecular Engineering Yonsei University 262 Seongsanno, Seodaemun-gu, Seoul 120-749, South Korea;

    Department of Chemical and Biomolecular Engineering University of Pennsylvania 220 South 33rd Street, Philadelphia, PA 19104, USA;

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