Effect of Structure on the Luminescent Characteristics of Complex Oxide Compounds of Bismuth(III) Doped with Europium(III)

It was shown that complex oxide compounds of bismuth(III) BiPO4, K5Bi5(PO4)(6), K2Bi(PO4)(MoO4), KBi(MoO4)(2), K5Bi(MoO4)(4), and BiVO4 doped with europium(III) exhibit high-intensity luminescence in the red region of the spectrum. It was found that the intensity ratio of the luminescence bands for the D-5(0)-> F-7(2) and D-5(0)-> F-7(1) transitions increases with increase in the degree of deformation of the BiO8 coordination polyhedra. The effect of the degree of deformation of the B-i O-III(8) coordination polyhedron on the intensity of the bands in the photoluminescence spectra of the studied compounds at room temperature was analyzed.