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Photovoltaic Performance of TiO2 Mesoporous Films with Different Working Areas for Dye-sensitized Solar Cell 1Departement of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jl. Semarang No. 5 Malang 651145 Abstract The enhancement of performance efficiency in Dye-sensitized Solar Cells (DSSC) could be optimized through the working area of the mesoporous TiO2 photoanode. A small working area will increase the photovoltage and power conversion efficiency. In comparison, a large working area will increase the recombination rate and slow down the photon particle transport rate at the photoanode. The TiO2 photoanode layer consists of a blocking layer deposited using a spin coating technique. While the mesoporous paste was deposited by screen printing method with three variations working areas (0.25, 0.30, and 0.56 cm2). The samples were characterized using XRD, SEM-EDX, UV-Vis spectroscopy, and solar simulator. XRD characterization confirmed that the TiO2 photoanode had an anatase phase. Based on SEM analysis, it is known that mesoporous TiO2 has a large surface area indicated by a porosity level of 70%. The elemental analysis of TiO2 were confirmed by EDX characterization that shows the presence of Ti and O peaks. The absorption spetra of the mesoporous TiO2 photoanode which has been soaked in 0.07 mM N719 dye solution has absorbance for wavelengths in the ultraviolet to the visible light range . In this work, the J-V characterization shows that for cell with a working electrode area of 0.25 cm2 exhibits promising power conversion efficiency up to 2.5% and circuit current density of 14 mA cm-2 under an illumination light of 100 mW/cm2. Keywords: Dye-sensitized solar cell, TiO2 mesoporous, working area, efficiency Topic: Materials Physics |
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