Enhanced efficiency of dye-sensitized solar cells doped with green phosphors LaPO4:Ce, Tb or (Mg, Zn)Al11O19:Eu
1 School of Applied Chemical Engineering, Chonnam National University, Gwangju, 500-757, Republic of Korea
2 Department of Advanced Chemicals & Engineering, Chonnam National University, Gwangju, 500-757, Republic of Korea
3 Jeonnam Nano Bio Research Center, Jangseong-gun, Jeollanam-do, 515-893, Republic of Korea
4 The Research Institute for Catalysis, Chonnam National University, Gwangju, 500-757, Republic of Korea
Nanoscale Research Letters 2013, 8:219 doi:10.1186/1556-276X-8-219Published: 8 May 2013
We have successfully introduced green phosphors LaPO4:Ce, Tb (G4) or (Mg, Zn)Al11O19:Eu (G2) into TiO2 photoelectrode of dye-sensitized solar cells. The conversion efficiency of the G4-doped device was enhanced by 30% compared with the pristine TiO2 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.