简易模板剂法制备多级介孔TiO2微球及其在染料敏化太阳能电池中的性能

doi:10.3866/PKU.WHXB201211071

Abstract

Abstract:

Mesoporous TiO₂ microspheres were synthesized using a simple template method. The effect of the alkyl chain length on the synthesis and properties of the TiO₂ microspheres was studied. A high power conversion efficiency (9.5%-10.1%) was attained by the dye-sensitized solar cells (DSCs) fabricated with the hierarchically mesoporous TiO₂ microsphere films. The physical properties of the TiO₂ microspheres were analyzed by X-ray diffraction (XRD), N₂ physisorption (BET), and scanning electron microscopy (SEM). The results indicated the TiO₂microsphere crystal structure to be in the pure anatase phase; the rough surface microstructure of the TiO₂ microspheres, formed through accumulation of nanocrystalline (14-18 nm diameter) TiO₂ particles, provides a proper large surface area and mesoporous structure. The hierarchically mesoporous TiO₂ microspheres can form good paths for mass transport, and also act as light scattering layers for efficient light harvesting. Meanwhile, the rough TiO₂ microsphere surface ensures a sufficient amount of dye uptake, and consequently improves the photo-generated electron density. Electrochemical impedance analysis demonstrated the advantage of using microspheres for mass transport in electrolytes.

Key words: Dye-sensitized solar cell, Photoelectrode, TiO₂ sphere, Nanostructure, Photoelectric conversion

MSC2000:

O649

GUO Wei, WANG Kai, SHEN Yi-Hua, ZHANG He, WENG Tao, MA Ting-Li. A Simple Template Synthesis of Hierarchically Mesoporous TiO₂ Microsphere for Dye-Sensitized Solar Cells[J].Acta Phys. -Chim. Sin., 2013, 29(01): 82-88.

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A Simple Template Synthesis of Hierarchically Mesoporous TiO₂ Microsphere for Dye-Sensitized Solar Cells

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A Simple Template Synthesis of Hierarchically Mesoporous TiO2 Microsphere for Dye-Sensitized Solar Cells

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A Simple Template Synthesis of Hierarchically Mesoporous TiO₂ Microsphere for Dye-Sensitized Solar Cells