Effect of H3BO3 on structure and photoluminescence of BaAl12O19:Mn2+ phosphor under VUV excitation

The green phosphor BaAl11.9O19:0.1Mn2+ (BHA) was prepared by flux assisted solid-state reaction method. The effect of H3BO3 and the fire conditions on the crystal structure and luminescent properties under vacuum ultraviolet region (VUV) excitation of the phosphor were studied. Results of XRD patterns indicated that a pure phase BaAl12O19 could be achieved at the firing temperature above 1300 °C doping H3BO3 of 7.0 wt% as flux. The additions of flux H3BO3 promoted the solid reaction and reduced the temperature forming BaAl12O19:Mn2+ phosphor. Photoluminescent measurements under VUV excitation indicated that the luminescent intensity of the BaAl11.9O19:0.1Mn2+ enhanced by solid-state reaction adding appropriate amounts of H3BO3 as a flux.