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Double-Layered Photoanodes from Variable-Size Anatase TiO2 Nanospindles: A Candidate for High-Efficiency Dye-Sensitized Solar Cells



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Little and large: A double-layered photoanode constructed from small and large single-crystal anatase TiO2 nanospindles achieves 8.3 % energy-conversion efficiency in a dye-sensitized solar cell (see picture). One layer of the double-layer structure serves mainly to harbor numerous dye molecules, and the other primarily enhances light harvesting by multiple scattering.