Synthesis and Optical Study of Barium Magnesium Aluminate Blue Phosphors

摘要

Europium doped barium magnesium aluminate (BaMgAl_(10)O_(17):Eu~(2+)) phosphor was prepared via solution combustion method at 550°C using urea as a fuel. Morphological and optical properties of the prepared sample was studied by X-ray diffraction (XRD), Transmission electron microscopy (TEM) and Photoluminescence spectroscopy (PL). XRD result showed the formation of pure phase BaMgAl_(10)O_(17) (JCPDS 26-0163) along with an additional phase BaAl_2O_4(JCPDS 01-082-1350). TEM image indicated the formation of faceted particles with average particle size 40 nm. From PL spectra, a broad emission band obtained at about 450 nm attributes to 4f~6 5d → 4f~7 transition of Eu~(2+) which lies in the blue region of the visible spectrum.