Nanosized Anatase TiO2 Single Crystals with Tunable Exposed (001) Facets for Enhanced Energy Conversion Efficiency of Dye-Sensitized Solar Cells

被引：203
作者：
Wu, Xia [1 ,2 ]
Chen, Zhigang [3 ]
Lu, Gao Qing [1 ,2 ]
Wang, Lianzhou [1 ,2 ]
机构：
[1] Univ Queensland, ARC Ctr Excellence Funct Nanomat, Sch Chem Engn, St Lucia, Qld 4072, Australia
[2] Univ Queensland, Australian Inst Bioengn & Nanotechnol, St Lucia, Qld 4072, Australia
[3] Univ Queensland, Sch Mech & Min Engn, St Lucia, Qld 4072, Australia
来源：
ADVANCED FUNCTIONAL MATERIALS | 2011年 / 21卷 / 21期
基金：
澳大利亚研究理事会;
关键词：
FABRICATION; PERCENTAGE; NANOSHEETS; WATER;
D O I：
10.1002/adfm.201100828
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
This paper reports the synthesis of nanosized TiO2 single crystals with different percentages of exposed (001) facets in the presence of HF solution. Various characterizations are conducted to understand the correlation between particle morphology, exposed (001) facets and photo-conversion efficiency of the nanosized anatase TiO2 single crystals. An enhancement in dye-sensitized solar cells (DSSCs) overall conversion efficiency is observed for the photoanode consisting of nanosized TiO2 single crystals with higher percentage of exposed (001) facets, increasing from 7.47%, 8.14% to 8.49% for the TiO2 single crystals with ca. 10%, 38%, and 80% percentage of exposed (001) facets. Experimentally confirmed by dark current potential and open-circuit voltage decay scans, such highly exposed (001) facets are not only favorable for more dye adsorption but also effectively retard the charge recombination process in DSSCs.
引用
收藏
页码：4167 / 4172
页数：6
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