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황경준,이재욱,윤호성,장희동,Jin Suk Yang,Jin-Geol Kim,유승준 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.10
A working electrode in dye-sensitized solar cells was fabricated using TiO2 colloidal sol prepared from titanium isopropoxide used as a starting material by applying the sol-gel method. The effect of aging times and temperatures on physical and chemical properties of TiO2 sol particles was systematically investigated. Results showed that the crystallinity and average particle size of TiO2 colloidal sol can be successfully controlled by the adjustment of aging time and temperature. The conversion efficiency of the repetitive dry coating films fabricated using the dried TiO2 colloidal sol particles and hydroxypropyl cellulose binder (15%) was 10.31% with a high transparency
Synthesis and Characterization of Nanostructured Titania Films for Dye-Sensitized Solar Cells
황경준,Seung-Joon Yoo,Sung-Hoon Jung,박동원,Sun-Il Kim,Jae-Wook Lee 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.1
The nature and morphology of titanium dioxide films play a significant role in determining the overall efficiency of dye-sensitized solar cell (DSSCs). In this work, the preparation of nanostructured titania particles by sol-gel method (SG-TiO2) and its characterization were investigated for the application of DSSCs. The samples were characterized by XRD, XPS, FE-SEM, BET and FT-IR analysis. The energy conversion efficiency of SG-TiO2 was approximately 8.3 % under illumination with AM 1.5 (100 mW/cm2) simulated sunlight. DSSCs made of SG-TiO2 nanocrystalline films as photoanodes achieved better energy conversion efficiency compared to those prepared using commercially available Degussa P25.