Abstract
Rare-earth doped titania single-crystalline hollow nanoparticles of 20 nm are constructed via a simple sol-gel process. Amphiphilic ABA tri-block copolymers played a key role in assisting the formation of hollow structure, for which a hollow nanostructure growth mechanism is proposed. By introducing rare earth into the synthesis process, the as-prepared nanoparticles exhibit near-infrared light absorption properties. Photo-decomposition efficiency of Orange II azo dye can be successfully evaluated when using Yb3+-doped TiO2 hollow nanoparticles as photocatalysts; it is more than two times higher than the pure TiO2 hollow nanoparticles. The hollow nanostructured Yb3+-doped TiO2 samples are exploited as photoanodes in N719-sensitized solar cells and prove able to improve the photoelectric conversion efficiency by measuring the solar cell parameters of dye-sensitized solar cells (DSSCs) under simulative sunlight.
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