Dye-sensitized solar cells (DSCs) are expected as a low
cost alternative to conventional solid-state device [1]. DSCs
have been concentrated to develop the efficiency and
reduce the production cost. Gra¨ tzel and co-workers
developed solar cell with solar energy conversion efficiency
of 10% in 1993 [2], 10.4% in 2001 [3], and 10.6% in 2003
[4]. This cell is composed of an FTO transparent
conducting glass covered with nano-sized TiO2, dye
molecules attached to the surface of TiO2, a redox couple
electrolyte, and counter electrode.