Influence of Fe₂(SO₄)₃ doping concentration into Chlorophyll (Carica Papaya L.) dye on performance of Dye-Sensitized Solar Cells

DSSC consisted of FTO glass / TiO₂ / dye / electrolyte / platinum / FTO glass. The aims of the research are to obtain the optical properties (spectrum absorbance) and electrical properties (I-V Characterization) from DSSC based using chlorophyll dye doped metal of Iron (III) Sulphate / Fe₂(SO₄)₃ with various concentration. Variation of Fe₂(SO₄)₃ concentration which doped to the chlorophyll dye were 10⁻¹M, 10⁻²M, 10⁻³M and 10⁻⁴M. The I-V characterization was measured using Keithley Type 2602A with irradiation halogen lamp and the optical properties was tested using Spectrophotometer UV-Visible Lambda 25. The result showed that absorbance spectrum for all various dye at wavelength of 400-500 nm and 640-700 nm. I-V characteristic by DSSC without Fe2(SO4)3 doping obtained V _oc of 2,7 x 10⁻¹ V, I _sc = 8,9 x 10⁻⁵ A FF = 4,7 x 10¹ and η _ef was about 1,1 x 10⁻² %. After doped by Fe₂(SO₄)₃ with largest concentration of 10⁻¹M obtained V _oc of 5,0 x 10⁻¹ V, I _sc = 2,0 x 10⁻⁴ A, FF = 9,5 x 10⁻¹ and η _ef was about 9,7 x 10⁻² %. (paper)