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首页> 外文期刊>Advanced Functional Materials >High Efficiency Solid-State Dye-Sensitized Solar Cells Assembled with Hierarchical Anatase Pine Tree-like TiO_2 Nanotubes
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High Efficiency Solid-State Dye-Sensitized Solar Cells Assembled with Hierarchical Anatase Pine Tree-like TiO_2 Nanotubes

机译：分层锐钛矿松树状TiO_2纳米管组装的高效固态染料敏化太阳能电池

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摘要

A facile and effective method to prepare hierarchical pine tree-like TiO_2 nanotube (PTT) arrays with an anatase phase directly grown on a transparent conducting oxide substrate via a one-step hydrothermal reaction. The PTT arrays consist of a vertically oriented long nanotube (NT) stem and a large number of short nanorod (NR) branches. Various PTT morphologies are obtained by adjusting the water/diethylene glycol ratio. The diameter of the NTs and the size of the NR branches decreases from 300 to100 nm and from 430 to 230 nm, respectively, with increasing water content. The length of the PTT arrays could be increased up to 19 μm to significantly improve the charge transport and specific surface area. The solid-state dye-sensitized solar cells (ssDSSC) assembled with the 19 μm long PTT arrays exhibit an outstanding energy-conversion efficiency of 8.0% at 100 mW/cm~2, which is two-fold higher than that of commercially available paste (4.0%) and one of the highest values obtained for N719 dye-based ssDSSCs. The high performance is attributed to the larger surface area, improved electron transport, and reduced electrolyte/electrode interfacial resistance, resulting from the one-dimensional, well-aligned structure with a high porosity and large pores.
机译：一种简便有效的方法，可通过一步水热反应直接在透明导电氧化物衬底上生长具有锐钛矿相的分层松树状TiO_2纳米管（PTT）阵列。 PTT阵列由垂直定向的长纳米管（NT）茎和大量短纳米棒（NR）分支组成。通过调节水/二甘醇比率，可以获得各种PTT形态。随着水含量的增加，NT的直径和NR支链的尺寸分别从300 nm减小到100 nm，从430 nm减小到230 nm。 PTT阵列的长度可以增加到19μm，以显着改善电荷传输和比表面积。组装有19μm长的PTT阵列的固态染料敏化太阳能电池（ssDSSC）在100 mW / cm〜2时表现出8.0％的出色能量转换效率，是市售糊剂的两倍。 （4.0％），是基于N719染料的ssDSSCs的最高值之​​一。高性能归因于具有高孔隙率和大孔隙的一维，排列良好的结构，可带来更大的表面积，改善的电子传输以及降低的电解质/电极界面电阻。

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  • 来源
    《Advanced Functional Materials》 |2014年第3期|379-386|共8页
  • 作者

    Dong Kyu Roh; Won Seok Chi; Harim Jeon; Sang Jin Kim; Jong Hak Kim;

  • 作者单位

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

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

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

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

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

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