Ordered R-TiO2@A(TiO2) architecture for dye-sensitized solar cell applications
Ordered R-TiO2@A(TiO2) architecture for dye-sensitized solar cell applications
复制标题
用于染料敏化太阳能电池应用的有序 R-TiO2@A(TiO2) 架构
DOI：
10.1039/c6ra21420g
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发表时间：
2016
期刊：
影响因子：
3.9
通讯作者：
Lei J. F.
中科院分区：
文献类型：
--
作者：
Liu Y. L.;Wang D. D.;Ni J.;Zhang S. F.;Jin X. J.;Lv S. J.;Wang Z. W.;Lei J. F.
在此，我们报告了一种绿色便捷的方法来制备致密层，以更好地构建分层TiO2结构作为光阳极，其中一维（1D）金红石TiO2（RTiO2）阵列在致密层上水热生长以实现快速电子传输，而支化锐钛矿TiO2（ATiO2）颗粒有序沉积在RTiO2主链上以实现高效染料收获。特性测试表明，一维 RTiO2 阵列呈四方形状，具有方形顶面，而支化 ATiO2 颗粒呈纳米圆锥形状，具有暴露的{001}面。结果，经N719染料敏化的RTiO2@ATiO2光阳极获得的太阳能转换效率为5.68%，比基于RTiO2阵列的染料敏化太阳能电池（DSSC）高出近3倍，这表明ATiO2纳米锥装饰的RTiO2纳米棒有助于提高太阳能转换效率。
Herein, we report a green and convenient method to prepare a compact layer for better construction of hierarchical TiO2 architectures to serve as photoanodes, in which one-dimensional (1D) rutile TiO2 (RTiO2) arrays are grown hydrothermally on a compact layer for fast electron transport, and branched anatase TiO2 (ATiO2) particles are deposited orderly on RTiO2 backbones for high efficiency dye harvesting. Characteristic tests indicate that the 1D RTiO2 arrays are tetragonal in shape with a square top surface, whereas the branched ATiO2 particles are nanoconic in shape with exposed {001} facets. As a result, the RTiO2@ATiO2 photoanode, sensitized by the N719 dye, harvests a solar energy conversion efficiency of 5.68%, which is nearly 3 times higher than that found in the RTiO2 array-based dye-sensitized solar cell (DSSC), which demonstrates that the RTiO2 nanorods decorated by ATiO2 nanocones are helpful in enhancing the solar energy conversion efficiency.