LUMINESCENCE PROPERTIES OF SRB4O7 - EU, TB PHOSPHORS

In this paper, the luminescence properties of SrB4O7: xEu, yTb phospho rs were investigated. The SrB4O7: xEu, yTb phosphors were first synthe sized in air atmosphere, and the emission spectra of Eu2+, Eu3+ and Tb 3+ ions have been observed in phosphors. We found that the relative in tensity of the emission of Eu2+ ion in the same matrix are increased w hen Tb3+ is incorporated in SrB4O7:Eu phosphor. So the valence state o f europium is influenced by terbium. These phenomena can be explained using an electron transfer theory.