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Enhanced efficiency of dye-sensitized solar cells by UV–O3 treatment of TiO2 layer

✍ Scribed by Byoung-Kuk Lee; Jang-Joo Kim

Book ID
108079129
Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
586 KB
Volume
9
Category
Article
ISSN
1567-1739

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✦ Synopsis

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 0.71V, the short circuit current density of 15.2mA/cm2 and the fill factor of 0.67 under illumination with AM 1.5 (100mW/cm2) simulated sunlight.

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The graphite-incorporated TiO 2 composites for the photoanodes of the Dye-sensitized solar cells were prepared by ultrasound-assisted mixing method. The performances of these solar cells with different graphite additions were investigated by the photocurrent-voltage characteristics, open-circuit vol