Abstract
The incorporation of nano-crystalline semiconductors with novel kinds of ordered microstructure is a very important area of research in the field of dye sensitized solar cells. A sol–gel method involving hydrolysis of titanium isopropoxide was used to form TiO2 nanoparticles on the surface of SiO2 spheres. In this process, 1, 5, or 10 wt% of SnCl2.2H2O was added to the sol–gel solution. To prepare TiO2/SnO2 nanoparticles with a half hollow sphere structure, SiO2 was removed with NaOH solution. The crystal phase, crystal shape, and surface properties of the metal oxide nanocrystals were studied by x-ray diffraction and scanning electron microscopy. The photovoltaic performance of the TiO2/SnO2 nanoparticles with half hollow sphere structures was measured. The dye sensitized solar cell using nanoporous TiO2 as electrode materials exhibits an overall conversion efficiency of 7.36% with a light intensity of 100 mW/cm2. The short circuit photocurrent (Isc), open circuit photovoltage (Voc), and conversion efficiency (η) of these solar cells were improved over conventional materials.
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This work was supported by Mid-career Researcher Program through NRF grant funded by the MEST (No. 2009-0083818).
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Bak, YR., Kim, GO., Hwang, MJ. et al. Fabrication and performance of nanoporous TiO2/SnO2 electrodes with a half hollow sphere structure for dye sensitized solar cells. J Sol-Gel Sci Technol 58, 518–523 (2011). https://doi.org/10.1007/s10971-011-2421-z
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DOI: https://doi.org/10.1007/s10971-011-2421-z