Enhanced efficiency of dye-sensitized solar cells doped with green phosphors LaPO(4):Ce, Tb or (Mg, Zn)Al(11)O(19):Eu

We have successfully introduced green phosphors LaPO(4):Ce, Tb (G4) or (Mg, Zn)Al(11)O(19):Eu (G2) into TiO(2) photoelectrode of dye-sensitized solar cells. The conversion efficiency of the G4-doped device was enhanced by 30% compared with the pristine TiO(2) photoelectrode. The green phosphor doped at 5-wt.% ratio contributed to the reduction of resistances of the surface and interface of the photoelectrode and to the great enhancement of the absorption spectrum in UV-visible and near-infrared regions. The internal resistances and absorbance of the photoelectrode directly affect the power conversion efficiency. Green phosphor plays an important role towards the realization of high-efficiency dye-sensitized solar cells.