VUV Spectral Properties of MBPO7 Co-Doped with Tm3+ ,Gd3+
A series of phosphor of MBPO7:Tm3+, and MBPO7:Tm3+, Gd3+ (M= Mg, Sr, Ca) were prepared and studied. The XRD data showed Tm3+, Gd3+ didn’t affects the lattice parameters. Excitation spectra exhibited high absorption in vacuum ultraviolet (VUV) region. There existed strong emission peaking at 453nm and 363nm correspond to the 1D2 →3HJ (J=4, 6) emission transition of Tm 3+ when excited under VUV. With the changes of cation in the samples, the excitation spectra changed greatly, and lead a great change in its emission spectra. The crystal lattice parameters affect the ratio of intensity of the peak at 454nm and 312nm.
Wei Pan and Jianghong Gong
X. Li et al., "VUV Spectral Properties of MBPO7 Co-Doped with Tm3+ ,Gd3+", Key Engineering Materials, Vols. 368-372, pp. 366-368, 2008