Luminescence Properties of （ Y, Gd） Al3 （BO3） 4 ： Eu^3＋ under VUV excitation

(Y, Gd)Al3(BO3)4∶Eu3+ samples were prepared by the conventional solid state reaction. The XRD results indicate that the crystal symmetry is low. The excitation spectrum is composed of two broad bands centered at about 170 and 250 nm respectively. In the emission spectra, the peak wavelength is about 616 nm under 147 nm VUV excitation. The luminescent chromaticity coordinate and the relative intensity change along with Gd3+ mole concentration in the range of 0.15 to 0.85 mol(and Eu3+ mole concentration, 0.02 to 0.1 mol). The correlative data show that the concentration quenching occurs when the Eu3+ mole concentration ranges from 0.02 to 0.1 mol, and the Gd3+→Gd3+, Gd3+→Eu3+ and host→Eu3+, Gd3+ energy transfers exist, and Gd3+ mole concentration influences Eu3+ emission.