BaAl 12O 19:Mn 2+ green emitting nanophosphor for PDP application synthesized by solution combustion method and its Vacuum Ultra-Violet Photoluminescence Characteristics

Abstract

Nanostructured BaAl 12O 19:Mn 2+ phosphor particles of nano-rod morphology with diameter 40–100 nm and length up to 200–600 nm has been synthesized by solution combustion method and its photoluminescence characteristics have been studied by Vacuum Ultra-Violet Photoluminescence spectrometer (VUVPL) under 147 nm excitation. The crystallographic phase purity of BaAl 12O 19:Mn 2+ nanostructured phosphor particle synthesized by solution combustion approach is confirmed by X-ray diffraction (XRD). The broadening of XRD diffraction peaks indicates nanocrystalline nature of particles present in powder. The emission spectrum of BaAl 12O 19:Mn 2+ nanophosphor on 147 nm excitation consists of a wide green band with a peak at about 515 nm, which is due to a 3d 5 ( 4T 1g)–3d 5 ( 6A 1g) transition corresponds of Mn 2+ ions. It is found that the concentration quenching is obtained when Mn 2+ content ( x) is 0.05 in BaAl 12O 19: xMn 2+ nanophosphor on 147 nm excitation. The decay time of 3d 5 ( 4T 1 g)–3d 5 ( 6A 1 g) transition of Mn 2+ ions at 147 nm excitation is about 23 ms for BaAl 12O 19:Mn 2+ nanophosphor. This nanostructured green emitting BaAl 12O 19:Mn 2+ phosphor can find potential application in Plasma Display Panels (PDPs) and mercury-free fluorescent lamps.