Influence of bismuth and calcium on the luminescence intensity of NaY1 − xEux(MoO4)2 phosphors

We have studied the effect of Bi 3+ and Ca 2+ cation additions and partial Si, P, and V substitutions for Mo on the photoluminescence of NaY 1− x Eu x (MoO 4 ) 2 scheelite-like red phosphors. The results demonstrate that the photoluminescence intensity in NaY 1 − x Eu x (MoO 4 ) 2 doped with Bi 3+ and Ca 2+ increases with europium concentration, up to x = 0.5, without concentration quenching. When the atomic fraction of Bi 3+ is 0.2, it has a sensitizing effect on Eu 3+ . Ca 2+ doping to an atomic fraction of 0.45 also increases the photoluminescence intensity. Partial Si, P, and V substitutions for Mo have little effect on the photoluminescence intensity.