Luminescence Properties of Eu2+ and Mn2+ Doped Sr2MgSiO5 Phosphors

Abstract

Eu²⁺ions doped Sr₂MgSiO₅ phosphors, and Eu²⁺- Mn²⁺ions-doped Sr₂MgSiO₅ phosphors were prepared via high-temperature solid state reaction method and sol-gel process, respectively. Luminescent mechanism and characteristics of all samples were studied. The results showed that lattice structure of Eu²⁺ ion-doped Sr₂MgSiO₅ samples was pyramidal system. The influence of flux on luminescence properties of Eu²⁺ ion-doped Sr₂MgSiO₅ phosphor was studied. The results of spectral analysis showed that flux changed the emission intensity of Sr₂MgSiO₅: Eu²⁺ samples at different wavelengths. Emission wavelength and relative intensity of the samples changed. In order to study the luminescence properties and energy transfer between Eu²⁺ and Mn²⁺, Eu²⁺ ions and Mn²⁺ ions co-doped samples were prepared. The results showed that excitation bands of the samples ranged from 250nm to 450 nm. When excited at 365nm, the emission spectrum of the samples consisted of three bands: blue, green and red, respectively. When Eu²⁺ ions and Mn²⁺ ions co-doped, the energy of Eu²⁺ ions was transferred to Mn²⁺ ions, which made Mn²⁺ ions became luminescence center in Sr₂MgSiO₅host.

DOI: http://dx.doi.org/10.11591/telkomnika.v11i6.2642