Photoluminescent and thermoluminescent properties of low temperature synthesized Nd3+ doped Mg2SiO4 nanophosphors for display and dosimetry applications

摘要： A potential green emitting orthorhombic Mg2SiO4:Nd3+ (1- 9 mol %) nanophosphors were synthesized by low temperature (350 oC) solution combustion technique. The characteristic PL emission peaks at ~ 458 nm (2G9/2 →4I9/2) and ~ 518 nm (4G5/2+2G7/2→4I9/2) were recorded upon 420 nm excitation and maximum intensity was observed for 3 mol % Nd3+ doped samples. The optimised sample exhibit CIE coordinates (0.1667, 0.4336) in green region with quantum efficiency of 65 %. The latent fingerprint detection analysis was carried out using optimised sample on versatile surfaces. The thermoluminescence studies of the γ- irradiated (1- 5 kGy) Mg2SiO4:Nd3+ (3 mol %) samples was studied with heating rate of 5 oCs-1. The TL glow peak was observed at 160 oC. The estimated trap parameters (b, E, s) by standard methods were reported. The obtained results from photoluminescence, fingerprint detection analysis and thermoluminescence properties suggest that the optimised phosphor could be a candidate for WLEDs, forensic and dosimetry applications.