A Study on the Characteristics of Dye Sensitized Solar Cells with TiO2Thickness and Sintering Temperature

In this thesis, it is investigated the characteristics of Dye Sensitized Solar Cell (DSSC) according to variation of TiO2 thickness (6, 12, 18, and 24 ㎛) and three distinct TiO₂ sintering temperatures (350, 450 and 550℃) by XRD, SEM, I-V and UV-Vis spectrophotometer. According to sintering temperature, TiO₂ was transformed into the anatase structure at 350℃, rutile structure at 550℃ and further into the two structure at 450℃. With increasing thickness up to 18 ㎛ and sintering temperature up to 450℃, respectively, the irradiance rate increased in the range of 9 ∼26 percent and 2.80∼5.10 percent. Whereas a further increase to 24 ㎛ and 550℃, the irradiance rate decrease in the range of 4∼11 percent and 30∼47 percent. The conversion efficiency increased in the range of 2.80∼5.01 and 3.03∼5.01 with increasing thickness up to 18㎛ and sintering temperature up to 450℃. By contrast, increase to 24 ㎛ and 550℃, the conversion efficiency decreased in the range of 3.31∼5.01 and 2.80∼3.89, respectively. The DSSC that thickness of TiO₂ were 18 ㎛ and sintered at 450℃ exhibited the most excellent characteristics, in which open-circuit voltage, short-circuit current, Fill Factor and conversion efficiency are 0.69 V, 11.4 ㎃/㎠, 0.64 and 5.01%, respectively.