Luminescence studies of Ba 1− xMg 2− y(PO 4) 2: xEu 2+, yMn 2+ phosphor

Abstract

The phosphors BaMg 2(PO 4) 2 doped with Eu 2+ and Mn 2+ solely or doubly were prepared by solid state reaction, and their luminescent properties were also investigated. Under the excitation of 322 nm, it has been observed a broad blue emission band centered at 417 nm and a red emission band centered at about 665 nm, resulting from Eu 2+ and Mn 2+, respectively. Resonance-type energy transfers from Eu 2+ to Mn 2+ were discovered by directly overlapping the emission spectra of Eu 2+ and the excitation spectra of Mn 2+. According to the changes of relative intensities of Eu 2+ and Mn 2+ emission, efficiencies of energy transfer were calculated. Based on the principle of energy transfer, the relative intensities of blue and red emission could be tuned by adjusting the contents of Eu 2+ and Mn 2+.