Abstract
ZnO nanoflowers were synthesized by low temperature solution-phase method. ZnO nanoflowers/TiO2 nanoparticles composite photoanodes with various mass ratios were prepared on transparent conductive fluorine-doped tin oxide substrates by doctor-blade technique. The dye-sensitized solar cells (DSSCs) were assembled. The morphology characteristics of ZnO nanoflowers and ZnO/TiO2 composite photoanodes have been analyzed by scanning electron microscopy. The effect of the ZnO nanoflowers/TiO2 nanoparticles mass ratio on the performance of DSSCs was systematically investigated by I–V characteristics and electrochemical impedance spectroscopy. Results show that the conversion efficiency of the dye-sensitized solar cell with a ZnO/TiO2 mass ratio of 25:75 was increased by about 35 % compared to that of pure TiO2-based solar cell. Addition of ZnO nanoflowers can enhance the light harvesting and improve electron transport.
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Acknowledgments
We are gratefully acknowledge the financial support of the projects from the National Natural Science of China (Grant No. 51202037) and the projects from the Science and Technology Department of Guangdong Province (Grant No. 2008B0108 00004).
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Liu, J., Wei, A., Zhao, Y. et al. Dye-sensitized solar cells based on ZnO nanoflowers and TiO2 nanoparticles composite photoanodes. J Mater Sci: Mater Electron 25, 1122–1126 (2014). https://doi.org/10.1007/s10854-013-1698-9
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DOI: https://doi.org/10.1007/s10854-013-1698-9