Template free synthesis route to monophasic BaMgAl₁₀O₁₇:Eu²⁺ with high luminescence efficiency

Luminescence properties of BaMgAl₁₀O₁₇:Eu²⁺ phosphors are greatly affected by its pure phase and uniform morphology. Hitherto different synthesis techniques have been adopted to achieve the same but phase purity and good crystallinity still remain desirable for BaMgAl₁₀O₁₇:Eu²⁺ nanophosphor. To obtain a highly intense blue light emitting BaMgAl₁₀O₁₇:Eu²⁺ nanophosphor, it was prepared in the absence of templates and additives by a simple solution combustion synthesis technique. The obtained powders were further acid leached and heat treated at 600 °C under argon atmosphere. BaMgAl₁₀O₁₇:Eu²⁺ samples obtained after this treatment show pure phasic characteristics having radical improvement in crystallinity with transformed morphology from multifaceted to rod-like. This structural modification has led to substantial increase in photoluminescence emission intensity of about 65% in comparison to the samples prepared by conventional solution combustion synthesis route.