Efficient Light Harvesting and Charge Collection of Dye-Sensitized Solar Cells with (001) Faceted Single Crystalline Anatase Nanoparticles

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• 作者：Feng Hao ; Xiao Wang ; Chen Zhou ; Xingjian Jiao ; Xin Li ; Jianbao Li ; Hong Lin
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：September 13, 2012
• 年：2012
• 卷：116
• 期：36
• 页码：19164-19172
• 全文大小：516K
• 年卷期：v.116,no.36(September 13, 2012)
• ISSN：1932-7455

文摘

With a comparable specific surface area, 17% enhanced dye-loading capacity was observed for the first time in the (001) faceted TiO₂ single crystals compared to that of benchmark P25 nanoparticles, thus generating a significant enrichment in both short-circuit photocurrent density and power conversion efficiency of dye-sensitized solar cells (DSCs). Such a remarkably increased dye-loading capacity was primarily ascribed to the higher density of 5-fold-coordinnated Ti atoms on the (001) surfaces. Furthermore, kinetic studies revealed that such single crystals confer a higher electron lifetime and charge collection efficiency compared with conventional P25 electrode, which might originate from the specific surface configuration in these high energetic facet dominant single crystals. Our study provides straightforward evidence for the superior reactivity of (001) facets and implies that such single TiO₂ crystals with high-energetic facets would be a promising electrode material for DSCs.