Effect of Hokianti Mikro (Carmona Retusa) Leaves Extract Concentration on Dye Sensitized Solar Cell (DSSC)

Abstract

The research on DSSC fabrication has been carried out using Hokianti micro leaf (carmona retusa) as an anthocyanin-based natural dye. DSSC is made using a TiO2 semiconductor coated on indium tin oxide (ITO) conductive glass with variations in the concentration of Hokianti micro leaf dye of 60, 75 and 90 mg/mL and variations in the color of the irradiation lamp on the DSSC, namely red, orange, green, blue and white. In this study, the results of characterization by FTIR spectrophotometer showed that the sample contained an aromatic ring functional group that acted as anthocyanin. Analysis with SEM showed that the surface morphology of the sample contained piles of grains with clear boundaries so that the grain diameter size could be obtained was approximately (54.13±0.62) µm. Characterization of sample dye using UV-Vis spectrophotometer at three concentrations of 60, 75 and 90 mg/mL absorbs light in the UV region, namely in the wavelength range of 200-400 nm with absorbance values of 0.4271, 0.4275 and 0.5449. The maximum absorbance value occurs at a concentration of 90 mg/mL, which is 0.5449. The results of characterization I-V showed that variations in the sample dye concentration of 60, 75 and 90 mg/mL affected the efficiency of DSSC with the highest efficiency values in red, orange, green, blue and white light colors, respectively 0.272%, 1.008%, 1.536%, 1.632% and 2.080%. The maximum efficiency value occurs at a concentration of 90 mg/mL illuminated by white light of 2.080%.