ZnO hierarchial structure prepared via direct precipitation for dye-sensitized solar cells

ZnO hierarchial structure prepared via direct precipitation for dye-sensitized solar cells A ZnO hierarchical structure was prepared via simple aqueous method at room temperature using zinc nitrate solution as precursor. Time-dependent trails demonstrated the formation of the hierarchical structure results from the Ostwald ripening effect. The ZnO hierarchical structure was further applied as photoanode in dye-sensitized solar cells (DSSCs), and a conversion efficiency of 2.36 % was demonstrated, which is higher than that of commercial ZnO-based DSSCs of 1.39 %. Based on the optical and electrochemical investigations, the high conversion efficiency was mainly ascribed to the unique structure of ZnO. The hierarchical structure can enhance the dye-loading capacity, and the hierarchical structure with micrometer-sized diameter could improve the scattering effect. Moreover, the good crystallinity can reduce the grain boundaries, suppress the recombination loss, and provide a fast electron transport, which therefore enhanced the conversion efficiency of cells. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

ZnO hierarchial structure prepared via direct precipitation for dye-sensitized solar cells

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Springer Netherlands
Copyright © 2013 by Springer Science+Business Media Dordrecht
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
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