Au/TiO_2纳米介孔空心球在DSSCs中的应用和性能研究

A Study of Au Nanoparticles Embedded Mesoporous TiO_2 Hollow Spherical Nanostructures Applying to Highly Efficient Dye-Sensitized Solar Cells

通过简单溶胶-凝胶和水热法设计制备了一种新颖的Au/TiO_2纳米空心球材料,Au纳米颗粒均匀地嵌入在TiO_2空心球内。利用这种材料的增强入射光吸收能力、染料吸附能力与TiO_2和Au纳米颗粒间的局域表面等离子体共振(LSPR)效应来提高电池的光电转换性能。短路电流-开路电压曲线(J-V)表明基于Au/TiO_2复合材料的DSSCs的光电转换效率高于纯TiO_2空心球DSSCs的光电转换效率。特别是,当Au/TiO_2质量比为5%时,电池展现出高达7.57%的光电转换效率,比纯TiO_2空心球的提高了近39%。

A novel nanostructure of Au/TiO2 hollow sphere composite was achieved through a facile sol-gel and one-step hydrothermal method, with Au nanoparticles uniformly embedded in TiO2 hollow spheres as the dye carrier to assemble dye-sensitized energy.Enhanced conversion efficiency was expected solar cells （DSSCs） for the enhanced harvest of solar by relying on such materials to absorb the incident light as much as possible,which might be ascribed to a large dye capacity and localized surface plasmon resonance （LSPR） between TiO2 and Au nanoparticles. DSSCs were assembled using attained Au/TiO2 hollow sphere composite with different mass ratios and their performances were tested.In accordance with DRS results, based on the composites, the DSSCs showed higher conversion efficiency than pure TiO2 hollow spheres.Especially,when the mass ratio （Au/TiO2） reached 5% ,the highest conversion efficiency was 7.57% ,a considerable improvement by ca.39%.