LUMINESCENCE AND ENERGY TRANSFER MECHANISMS OF EU2+, MN2+ CODOPED BAMGAL10O17 PHOSPHOR

Abstract

Eu²⁺, Mn²⁺ codoped BaMgAl₁₀O₁₇ (BAM) phosphors were synthesized by the method of solution combustion. Under the selective excitation at 306 nm, the emission spectra of the phosphors had a blue emission band at 450 nm and a green emission band at 513 nm. Energy transfer mechanism from Eu²⁺ to Mn²⁺ was clarified. The results indicated that the Eu²⁺ ions replaced with the Ba²⁺ sites and Mn²⁺ ions occupied the Mg²⁺ sites. The color-shift of phosphors under excitation of 306 nm was displayed at variable concentration of Mn²⁺ ion.