Pi-electron conjugated an extended for dye-sensitized solar cell sensitizing dye

Using sensitized semiconductor fine particles by the dye, it is an object to develop a solar cell using a good photoelectric conversion element and its conversion efficiency at low cost. A thin film of oxide semiconductor fine particles provided on a substrate, a photoelectric conversion element comprising by supporting a metal complex dye or a salt thereof represented by the formula (1). (In the formula (1), ring a, b, c and d are each a substituent may have one to three .m is an integer of 1 or 2 .Z formula (2) or ( represented by 3). A A A A )