Fluorescence Spectra of Eu3+and Tb3+Doped Na6Ln (BO3)3(Ln = La, Gd, Y) Phosphors

Abstract
The fluorescence properties of Eu3 + and Tb3+ doped Na6La(BO3)3, Na6Gd(BO3)3, Na6Y(BO3)3, Na6(Gd, Y) (BO3)3 powder phosphors are reported. These phosphors display fluorescent RED and GREEN colours when droped with Eu3+ and Tb3+ ions, respectively. The best fluorescence performance was consistantly observed from the Na-Gd based hosts. The photoluminescence spectra were analysed by evaluating colour coordinates, relative intensity ratios, and stimulated emission cross-sections.