S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Material Science and Engineering (재료공학부) Journal Papers (저널논문_재료공학부)
Enhanced efficiency of dye-sensitized solar cells by UV–O3 treatment of TiO2 layer
- Lee, Byoung-Kuk; Kim, Jang-Joo
- Issue Date
- Curr. Appl. Phys. 9 (2009) 404
- Solar conversion efficiency of dye-sensitized solar cells was improved by UV–O3 treatment of TiO2 before and/or after sintering. The enhancement was resulted from the removal of the residual organics originated from the TiO2 precursor pastes, increased adsorption of dyes to the TiO2, surface, and longer diffusion length and shorter electron transit time of electrons through the TiO2 mesoscopic structure. The power conversion efficiency of the cells reaches to 7.2% with the open circuit voltage of 0.71 V, the short circuit current density of 15.2 mA/cm2 and the fill factor of 0.67 under illumination with AM 1.5 (100 mW/cm2) simulated sunlight.
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