Increasing the Oxygen Vacancy Density on the TiO2 Surface by La-Doping for Dye-Sensitized Solar Cells

被引：155

作者：

Zhang, Jiyuan ^{[1
,2
]}

Zhao, Zongyan ^{[1
,2
]}

Wang, Xiangyan ^{[1
,3
]}

Yu, Tao ^{[1
,2
,4
]}

Guan, Jie ^{[1
,2
]}

Yu, Zhentao ^{[1
,2
]}

Li, Zhaosheng ^{[1
,3
]}

Zou, Zhigang ^{[1
,2
,3
]}

机构：

[1] Nanjing Univ, Ecomat & Renewable Energy Res Ctr, Nanjing 210093, Peoples R China

[2] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China

[3] Nanjing Univ, Dept Mat Sci & Engn, Nanjing 210093, Peoples R China

[4] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 43期

基金：

中国国家自然科学基金;

关键词：

DOPED TIO2; PHOTOCATALYTIC ACTIVITY; PHASE-TRANSFORMATION; TITANIUM-OXIDE; ANATASE; ADSORPTION; NANOPARTICLES; WATER;

D O I：

10.1021/jp106648c

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Facilitated by TiO2 particles absorbing La3+ in hydrosol, La-doped TiO2 was prepared by a sol-hydrothermal method. Electron paramagnetic resonance and Brunauer-Emmett-Teller (BET) surface area analysis showed that the obtained La-doped anatase TiO2 surface provided a higher density of oxygen vacancies without a change in the BET surface area. A theoretical calculation was carried out to explain the generation mechanism of the increased oxygen vacancies. The results showed that the La-doped anatase TiO2 (101) surface tends to engender oxygen vacancies. The photoelectric conversion efficiency of dye-sensitized solar cells fabricated from 1 mol % La-doped TiO2 reached 6.72%, which gave an efficiency improved by 13.5% compared with that of the cells fabricated from pure TiO2. The improvement in the efficiency was ascribed to more dye absorbed on the surface of TiO2.

引用

页码：18396 / 18400

页数：5

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