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Citation: YANG Shu-Ming, KOU Hui-Zhi, WANG Ling, WANG Hong-Jun, FU Wen-Hong. Photoelectrochemical Properties of N3 Sensitized Ho³⁺ Modified TiO₂ Nanocrystalline Electrodes[J]. Acta Physico-Chimica Sinica, ;2009, 25(06): 1219-1224. doi: 10.3866/PKU.WHXB20090526 shu

Photoelectrochemical Properties of N3 Sensitized Ho³⁺ Modified TiO₂ Nanocrystalline Electrodes

1.
College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, Henan Province, P. R. China

Received Date: 24 November 2008
Available Online: 23 March 2009

Effects of Ho3+ ion modification on photoelectrical properties of TiO2 electrodes were investigated. On the one hand, the Ho3+ layer decreased electron injection between the dye and TiO2, but on the other hand, it suppressed charge recombination. Experimental results showed that an energy barrier was formed when the TiO2 electrode was modified with a Ho3+ layer of a certain thickness. This energy barrier efficiently suppressed charge recombination. As a result, the photovoltage and photoelectrical conversion efficiency were improved under optimal conditions. Photoelectrical conversion efficiencies of TiO2/Ho-0.1 and TiO2/Ho-0.2 (0.1 and 0.2 are the concentrations of Ho3+ solution used for modification, mol·L-1) electrodes reached 8.3%and 7.6%, respectively, under illumination with white light at 93.1 mW·cm-2. This represents an increase of about 15% and 5%, respectively, compared to a bare TiO2 electrode (7.2%).
- Surface modification,
- TiO2 nanocrystalline electrode,
- Dye sensitized solar cell,
- Photoelectrical property
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沈阳化工大学材料科学与工程学院沈阳 110142

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Photoelectrochemical Properties of N3 Sensitized Ho3+ Modified TiO2 Nanocrystalline Electrodes

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通讯作者: 陈斌, bchen63@163.com

Photoelectrochemical Properties of N3 Sensitized Ho³⁺ Modified TiO₂ Nanocrystalline Electrodes