Effect of TiO2 thickness on dye sensitized solar cell performance

A dye solar cell with a dimension of 6 × 2 cm is fabricated with thickness of 40 μm, 80 μm and 120 μm of TiO₂ by smearing it on an ITO coated glass. It is then tested under the average solar irradiance and temperature of 693.69 w/m2, 44.4°C respectively. Based on experimental investigation it is found that TiO₂ of 40 μm produces V_oc = 0.21V, I_sc = 121.28 μA, Fill Factor (FF) = 1.1845, while the 80 μm produces V_oc = 0.16 V, I_sc = 69.89 μA, Fill Factor (FF) = 1.49 and TiO₂ layer with thickness of 120μm produces V_oc = 0.00063 V, I_sc = 0 mA, Fill Factor (FF) = 0. From these results it shows that the best charge generation is from the thinner TiO₂ thickness layer which is the 40um compare to with the other size.