Rare Earth Dy3+ Activated MgSrAl10O17 Phosphors for Luminescence

Abstract

MgSrAl10O17:xDy3+ nanophosphors were fabricated by combustion method for different concentrations (x = 0, 0.0005, 0.001, 0.005, 0.01 and 0.02 mol) of Dysprosium (Dy). The synthesized nanophosphors were characterized by XRD, SEM, TEM, FTIR, PL and TL. The XRD (X-ray diffraction) showed crystalline hexagonal structure with preferred orientation of (107) plane. SEM (Scanning electron microscope) result shows the formation of nanosheets in irregular shape. TEM (transmission electron microscope) study revealed the nanoparticles within average diameter size of 30 nm. The FTIR ( fourier transform infrared spectrum) shows absorption peaks in numerous regions. TL (thermo-luminescence) properties included TL glow curves and TL response for different concentrations of Dy after exposure of 700 Gy gamma rays. TL intensity was found to increase with increase in concentration of dopant Dy and was found to show best result for x=0.02. Further PL (photoluminescence) characterization ofMgSrAl10O17:0.02 Dy3+ phosphor exhibits two main emission peaks at 484 and 575 nm due to Dy3+ ion, when excited with 350 nm wavelength.