Proton, UV, and X-ray induced luminescence in Tb³⁺ doped LuGd₂Ga₂Al₃O₁₂ phosphors

The well-known solid-state reaction method is used for the synthesis of Tb doped LuGd₂Ga₂Al₃O₁₂ phosphor. XRD and SEM techniques are used for the phase and structural morphology of the synthesized phosphor. UV, X-ray and proton induced spectroscopy is used to study the luminescence properties. LuGd₂Ga₂Al₃O₁₂:Tb³⁺ phosphor shows its highest peak in green and blue region. The two major emission peaks correspond to⁵D₃→⁷F_J (at 480 to 510 nm, blue region) and⁵D₄→⁷F_J (at 535 to 565 nm, green region). Green emission is dominant; therefore, it may be used as an efficient green phosphor. The absorption spectra of the synthesized material matches well with the spectra of light emitting diodes (LEDs); therefore, it may have applications in LEDs. X-ray spectroscopic study suggests that this phosphor may have uses in medical applications, such as X-ray imaging. The synthesized phosphor exhibits 81% efficacy in comparison to the commercial plasma display panel material (Gd₂O₂S:Tb³⁺). The Commission Internationale de l’Eclairage (CIE) chromaticity diagram is obtained for this phosphor. The decay time of ms range is measured for the synthesized phosphor.