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This research studied the effect of adding synthetic dye DN-F05 (red dye) to electrical and optical properties. Dye-Sensitized Solar Cell (DSSC) sandwich components are consist of FTO/TiO₂-Dye-elektrolit-Platina/FTO. In this study, the working electrodes were made by Titanium dioxide (TiO2) which was deposited on FTO glass and then annealed at 450^oC for 30 minutes. The dye concentration DN-F05 was made with a mass of 0.001 gr, then will be stirred for 2 hours into 5 ml of ethanol at a temperature of 40^oC. In this study the spin coating method is used with a rotational speed of 1000 rpm for 20 seconds. Characterization of optical properties was carried out using a UV-VIS spectrophotometer to determine the absorbance curve of dye and to get Gap energy. The peak absorbance value was obtained at wavelengths between 400-700 nm. This proved that the addition of DN-F05 dye concentration has a major influence on the optical properties.

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This research reports the performance of DSSC solar cells that have been fabricated by modification of Ag metal doping with varying concentrations. The sample was deposited by spin coating method and characterized using UV-Vis spectrophotometer to obtain gap energy, FESEM characterization to see sample’s morphology, IPCE, and solar simulator to show performance of DSSC solar cell. The TiO2 / DN-F01 / Ag working electrode layer has a gap energy of 1.95 eV which value is smaller than the pure TiO2 layer and TiO2 / DN-F01 which value is 3.15 eV and 2.3 eV respectively. The results show the greatest efficiency found in Ag doped dye solar cell samples with Ag mass of 0.0172 gr. This result was influenced by Ag metal which has good light absorption ability, extends TiO2 response to visible light, and charge recombination.

<p>Dye sensitized solar cell (DSSC) is the third generation of solar cells that currently developing by researchers to get the best performance. The selection of dye as a component of DSSC has a big influence in the light absorption process. In this study, DN-F01 organic dye was used as a sensitizer with various concentrations. The optical properties test was carried out on the DN-F01 dye solution by UV-Vis spectrophotometer (Shimadzu UV-1800) and the DSSC fabricated performance was tested by portable solar simulator (ORIEL Sol1A). From the results, the DN-F01 absorbance has ability to absorb light in the 300-500 nm wavelength range. The greatest efficiency value in this research is 2.44% obtained from the sample was immersed with the largest concentration of dye DN-F01 which has the smallest band gap energy of 2.38 eV.</p>