Abstract
In this paper, it is investigated the characteristics of DSSC(Dye Sensitized Solar Cell) with cell area(0.25, 1, 2.25 cm2) and dye absorption time(12, 24, 36 h). Thus, we obtain the following results by using the EIS, UV-VIS, I-V measurement. When the cell area increases, the efficiency decreases to 21∼32 percent because of the increase about 40∼60 Ω of internal impedance regardless of dye absorption time. When the absorption time increases up to 24 hours, the efficiency increases to over 40 percent cause of the reduction of internal impedance regardless of cell area. When the dye absorption time becomes 36 hours, the internal impedance increases and at the same time, in the range of 600∼700 nm, as the optical absorption reduces. Therefore, the efficiency decreases to 19∼31 percent. When it is absorbed the dye for 24 hours in the smallest cell area which is 0.25 cm<sub>2</sub>, the DSSC has the best efficiency (7.11 %).
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