Microwave-assisted combustion synthesis and luminescence properties of colour-tunable Eu 3+ /Tb 3+ co-doped BaLaB 9 O 16 .

In the present study, hexagonal structured borate phosphors BaLaB ₉ O ₁₆ were prepared using a combustion method with colour-tunable emission properties achieved by varying the doping concentration of Eu ³⁺ and Tb ³⁺ in the cluster. The as-prepared materials were analyzed for structural and morphological parameters through X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM) studies. Tuning of colour was predicted through the photoluminescence and photoluminescence excitation spectra of the materials that showed good green and red emissions when doped with Tb ³⁺ and Eu ³⁺ , respectively, whereas the emission of the co-doped sample (Eu ³⁺ and Tb ³⁺ ) can be varied from the green region to red region by varying the excitation range from 207 to 254  nm.
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