Application of upconversion luminescence in dye-sensitized solar cells

作者：Xie GuiXiang; Lin JianMing; Wu JiHuai; Lan Zhang; Li QingHua; Xiao YaoMing; Yue GenTian; Yue HaiFeng; Huang MiaoLiang

来源：Chinese Science Bulletin, 2011, 56(1): 96-101.

DOI：10.1007/s11434-010-4115-2

• dye-sensitized solar cell
• upconversion luminescence
• p-type doping

An upconversion luminescence powder TiO(2):(Er(3+), Yb(3+)) is prepared by a hydrothermal method and used to fabricate dye-sensitized solar cell (DSSC). The TiO(2):(Er(3+), Yb(3+)) powder undergoes upconversion luminescence, converting infrared light which the dye can not absorb into visible light with wavelengths of 510-700 nm which the dye can absorb, increasing the photocurrent of the DSSC. TiO(2):(Er(3+), Yb(3+)) also acts as a p-type dopant, heightening the Fermi level of the oxide film, which increases the photovoltage of the DSSC. The best performance of the DSSC is found when the ratio of TiO(2)/luminescence powder is 1/3 in the luminescence layer. Under simulated solar irradiation of 100 mW cm(-2) (AM 1.5), the DSSC containing TiO(2):(Er(3+), Yb(3+)) doping achieves a light-to-electricity energy conversion efficiency of 7.28% compared with 6.41% for the undoped DSSC.

• 出版日期2011-1
• 单位华侨大学