State Key Lab of Luminescent Materials and Devices, and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2013 Nov;115:767-71. doi: 10.1016/j.saa.2013.06.111. Epub 2013 Jul 8.
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).
Gd2MoO6:RE（3+）（RE=Eu 或 Sm）和 Gd2MoO6:Bi（3+），RE（3+）（RE=Eu 或 Sm）荧光粉通过燃烧法合成。通过 X 射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）、扫描电子显微镜（SEM）、光致发光激发（PLE）和光致发光（PL）光谱对样品进行了表征。通过将 Bi（3+）离子引入 Gd2MoO6:RE（3+）（RE=Eu 或 Sm）荧光粉中，Eu（3+）和 Sm（3+）离子的激发带被拓宽并移至短波长，同时，发射强度明显增强。观察到并讨论了 Bi（3+）向 Eu（3+）或 Sm（3+）激活剂的能量转移。此外，Gd2MoO6:Bi（3+），RE（3+）（RE=Eu 或 Sm）荧光粉可以实现从紫外光（250-400nm）到可见光的转换过程。这些荧光粉可以成为一种很有前途的紫外光吸收发光转化器，以提高染料敏化太阳能电池（DSSCs）的光电转换效率。
