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TiO2 hollow spheres with outer diameter of 1.0-2.5μm and shell thickness of 200nm are successfully prepared via a facile hydrothermal method without use of any template agent. The as-prepared TiO2 hollow spheres are crystalline of the anatase phase, and possess a specific surface area of 48m2g−1. A high power conversion efficiency of 7.68% is achieved for dye-sensitized solar cell (DSSC) based on...
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