The luminescence properties of Bi(3+) sensitized Gd2MoO6:RE(3+) (RE=Eu or Sm) phosphors for solar spectral conversion.

Gd2MoO6:RE(3+) (RE=Eu or Sm) and Gd2MoO6:Bi(3+), RE(3+) (RE=Eu or Sm) phosphors have been synthesized by combustion method. The samples are characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), photoluminescence excitation (PLE) and photoluminescence (PL) spectra. By introducing Bi(3+) ions into Gd2MoO6:RE(3+) (RE=Eu or Sm) phosphors, the excitation bands of Eu(3+) and Sm(3+) ions are broadened and shifted to short wavelength, meanwhile, the emission intensity are enhanced obviously. The energy transfer from Bi(3+) to the activators of Eu(3+) or Sm(3+) is observed and discussed. In addition, the process of ultraviolet light (250-400nm) converted into visible light can be achieved by using Gd2MoO6:Bi(3+), RE(3+) (RE=Eu or Sm) phosphor. These phosphors can be a promising ultraviolet-absorbing luminescent converter to enhance the photoelectrical conversion efficiency of dye-sensitized solar cells (DSSCs).