Structural, Optical And Luminescent Behaviour Of Dysprosium Doped Mgal2o4 Nanophosphors
Abstract
In the present paper we have reported structural, optical and luminescent behavior of Magnesium Aluminate (MgAl2O4) phosphors Doped with Dysprosium (Dy3+) with different concentration ranging from0.001-0.003 mol . Using urea as fuel, MgAl2O4 doped with Dysprosium (Dy3+) phosphors were made ready through a combustion method .Their incandescence behaviors of the nanophosphors were inspected under ultraviolet (UV) rays. Excitations were scrutinized and analyzed for best optimum concentration of dysprosium. Unalloyed MgAl2O4 juncture was devised by urea-nitrate suspension by combustion synthesis manner at 550 ̊C. The structural properties of unalloyed and Dy3+-doped MgAl2O4 nanaocystallites were scrutinized by X-ray diffraction (XRD) with Cu Kα [40kV, 15mA X-ray] at λ = 1.541862˚A and Fourier Transform Infrared (FTIR) Spectroscopy (PEService). The crystal size was deliberated by Scherer’s equation. These nano crystallites exhibits strong blue emission at λ exci = 286.33nm, 286.59 nm & 274.1nm for 0.001, 0.002 & 0.003 mol concentration of doped dysprosium (Dy3+) respectively. The blue emanations are ascribed to 5D4-7FJ (where J =3, 4, 5&6) transformation of Dy3+ electrolytes respectively. These nanocrystallites have manifested a powerful, outstanding blue emanation from 5D4-7F5 at 467.89nm, 485.91nm & 475.72nm for 0.001, 0.002 & 0.003mol concentration of dysprosium respectively. The Thermo luminescence (TL) studies for the said samples were allotted and the TL spectra were obtained from Thermo WinREMS-TLD Reader wrw .The utmost peak of TL intensity were appeared at approximate channel number 150 for MgAl2O4: xDy phosphors (x = 0.001,0.002 and 0.003mol). The outcome have designated that amidst 0.001, 0.002 & 0.003 mol concentration of dysprosium 0.002 mol doped MgAl2O4: Dy can be a possible contender as a blue-emanating pounce and Personnel Monitoring Devices for Radiation Worker.
