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This study investigated the different thicknesses of TiO 2 photoanode films and the effect of surface plasmon resonance (SPR) of Ag-TiO 2 nanocomposites on the current-voltage (I-V) performance of dye-sensitized solar cells (DSSC). The TiO 2 layer was deposited using the doctor blade technique and the thickness of the TiO 2 films was controlled by using a different number of Scotch tape layers. The silver nanoparticles (AgNP) were synthesised using a chemical reduction method and the concentration of sodium citrate as a reducing agent was varied from 4 to 12 mM to study the effect of citrate ion on the size of the nanoparticles. Ag-TiO 2 nanopowder was prepared by adding pure anatase TiO 2 powder into AgNP colloidal solution. The mixture was left to dry for 24 h to obtain Ag-TiO 2 powder for paste preparation. The three-layer Scotch tape, with thickness of 14.38 µm, achieved a high efficiency of 4.14%. This results showed that three layers was the optimal thickness to improve dye loading and to reduce the charge recombination rate. As for the Ag-TiO 2 nanocomposites, 10 mM of AgNP, with a mean diameter of 65.23 nm and high efficiency of 6.92%, proved that SPR can enhance the absorption capability of dye and improve the photon-to-electron generation.

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Enhancing Photocurrent Performance Based on Photoanode Thickness and Surface Plasmon Resonance Using Ag-TiO2 Nanocomposites in Dye-Sensitized Solar Cells