BaAl12O19:Mn2+ green emitting nanophosphor for PDP application synthesized by solution combustion method and its Vacuum Ultra-Violet Photoluminescence Characteristics

Nanostructured BaAl12O19:Mn2+ 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 BaAl12O19:Mn2+ 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 BaAl12O19:Mn2+ nanophosphor on 147 nm excitation consists of a wide green band with a peak at about 515 nm, which is due to a 3d5 (4T1g)–3d5 (6A1g) transition corresponds of Mn2+ ions. It is found that the concentration quenching is obtained when Mn2+ content (x) is 0.05 in BaAl12O19:xMn2+ nanophosphor on 147 nm excitation. The decay time of 3d5 (4T1 g)–3d5 (6A1 g) transition of Mn2+ ions at 147 nm excitation is about 23 ms for BaAl12O19:Mn2+ nanophosphor. This nanostructured green emitting BaAl12O19:Mn2+ phosphor can find potential application in Plasma Display Panels (PDPs) and mercury-free fluorescent lamps.