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http://dx.doi.org/10.4150/KPMI.2010.17.6.449

Coating Property of Hybrid Structured Photo-Electrode to Increase Dye-Sensitized Solar Cells Efficiency  

Kim, Min-Hee (National Core Research Center for Hybrid Materials Solution, Pusan National University)
Lee, Hyung-Woo (National Core Research Center for Hybrid Materials Solution, Pusan National University)
Jeong, Young-Keun (National Core Research Center for Hybrid Materials Solution, Pusan National University)
Publication Information
Journal of Powder Materials / v.17, no.6, 2010 , pp. 449-455 More about this Journal
Abstract
The hybrid structured photo-electrode for dye-sensitized solar cells was fabricated based on the composites of $TiO_2$ nanoparticles and nanowires. Three samples with different hybrid structures were prepared with 17 vol%, 43 vol%, and 100 vol% nanowires. The energy conversion efficiency was enhanced from 5.54% for pure nanoparticle cells to 6.01% for the hybrid structure with 17 vol% nanowires. For the hybrid structured layers with high nanowires concentration (43 vol% and 100 vol%), the efficiency decreased with the nanowire concentration, because of the decrease of specific surface area, and of thus decreased current density. The random orientations of $TiO_2$ nanowires can be preserved by the doctor blade process, resulted in the enhanced efficiency. The hybrid structured $TiO_2$ layer can possess the advantages of the high surface area of nanoparticles and the rapid electron transport rate and the light scattering effect of nanowires.
Keywords
Dye-sensitized solar cell; Hybrid structure; Titania nanowire; Screen printing; Doctor blade;
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