二氧化钛纳米晶溶胶内渗透电极对染料敏化太阳能电池的光伏性能的提高

doi:10.3866/PKU.WHXB20100948

Abstract

Abstract:

Transparent anatase titanium dioxide sol was prepared by the hydrothermal treatment of the home-made water soluble peroxotitanium acid (PTA). The nanorod-like TiO₂ nanocrystals witha mean diameter of less than7 nm were obtained in the absence of organic compounds. In order to eliminate the large pores derived from eletrode sintering and improve the connectivity among particles in the porous TiO₂ electrode, the as-prepared TiO₂ sol was infiltrated to the porous TiO₂ photoanode for dye sensitized solar cells (DSSCs). As a result, small nanocrystals of titanium dioxide attached to the surface of porous titanium dioxide as well as filled the large pores produced by photoanode sintering. The efficient electron transport networks were formed inside the porous titanium dioxide, which was confirmed by scanning electron microscope (SEM) and optical profilometry. The modified TiO₂ film as the anodic electrode was used for the DSSCs and assembled into solar cells. Consequently, the overall energy conversion efficiency of the DSSCs was significantly enhanced by 64% after the low-concentration TiO₂ sol infiltration.

Key words: Sol, Infiltration, Electrode interface, Titania, Dye sensitized solar cell

QIAN Di-Feng, ZHANG Qing-Hong, WAN Jun, LI Yao-Gang, WANG Hong-Zhi. Enhancing the Photovoltaic Performance of Dye Sensitized Solar Cells with the TiO₂ Sol Infiltrated Nanocrystalline Electrode[J]. Acta Phys. -Chim. Sin. 2010, 26(10), 2745-2751. doi: 10.3866/PKU.WHXB20100948

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Enhancing the Photovoltaic Performance of Dye Sensitized Solar Cells with the TiO₂ Sol Infiltrated Nanocrystalline Electrode

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Enhancing the Photovoltaic Performance of Dye Sensitized Solar Cells with the TiO₂ Sol Infiltrated Nanocrystalline Electrode