Abstract
An innovative green emitting novel BaY1 - xTbxAl3O7 (x = 0.02, 0.03, 0.04, 0.05, and 0.06) was synthesized using urea combustion, which was a low-energy process. Using techniques such as photoluminescence (PL), X-ray diffraction (XRD), transmission electron microscopy (TEM), and energy dispersive x-ray (EDX) spectroscopy, the structure and luminous properties of the phosphor were investigated. Scherrer's equation was utilized in the XRD technique to determine the crystallite size of the suggested materials. When stimulated with the near-ultraviolet photon, PL spectra revealed intense green emission at 541nm (5D4 → 7F5). The composition with the maximum emission intensity is BaY0.96Tb0.04Al3O7. The dipole-dipole mechanism for concentration quenching events was identified with the help of the critical energy transfer distance. The non-radiative relaxation rate (276s- 1), radiative lifetime (0.75754 ms), and quantum efficiency (79%), of the ideal phosphor composition are calculated using Auzel's model. The color coordinates (0.260, 0.496) align with the emission of green light. The remarkable outcomes validated the significance of the targeted nanocrystals as a superior material with prospective applications in solid-state down-converted white light-emitting diodes (WLEDs).
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