Hierarchically Assembled ZnO Nanocrystallites for High-Efficiency Dye-Sensitized Solar Cells


  • Dr. Caterina Soldano is acknowledged for fruitful discussions and suggestions during the preparation of the manuscript. Nicola Poli is acknowledged for his technical assistance in the set-up of the spray pyrolysis apparatus. The CARIPLO Foundation under contract 2008.2393 and Oikos srl (Brescia) is acknowledged for partial funding.


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Spray pyrolysis is effective in the formation of a nanoengineered photoanode. An unprecedented photoconversion efficiency of 7.5 % for ZnO-based dye-sensitized cells was achieved on a photoelectrode consisting of polydispersed ZnO aggregates of nanocrystallites over a compact ZnO buffer layer at a firing temperature of 450 °C. FTO= fluorine-doped tin oxide.