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- Title
GROWTH AND CHARACTERISATION OF DYSPROSIUMDOPED MgSrAl<sub>10</sub>O<sub>17</sub> PHOSPHOR FOR LUMINESCENCE.
- Authors
MISHRA, P. K.; SHROTRIYA, V.; MISHRA, S. P.; PALIWAL, R. K.; VERMA, A.; PATHAK, S. K.
- Abstract
In this report, MgSrAl10O17:xDy³ nanophosphors were fabricated by combustion method for different concentrations (x = 0, 0.0005, 0.001, 0.005, 0.01 and 0.02) of Dysprosium (Dy). The synthesised nanophosphors were characterised 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 an irregular shape. TEM (transmission electron microscope) study revealed the nanoparticles an average diameter of 30 nm. TL (Thermo-luminance) properties included TL glow curves and TL response for different concentrations of Dy after exposure to 700 Gy gamma rays. LiMgBO3 shows the major TL glow peak at 100oC. TL intensity was found to increase with an increase in the dopant Dy concentration and was found to show the best result for x = 0.02. Further, PL (Photoluminescence) characterisation of MgSrAl10O17:0.02 Dy3+ phosphor exhibits two main emission peaks at 484 and 575 nm due to Dy3+ ion, when excited with 350 nm wavelength. So, emission of the Dy3+ luminescence is close to the white region, and hence MgSrAl10O17:xDy3+ phosphor can be a good candidate in solid-state lighting for white light emission. In kinetic parameters: activation energy (E) and order of kinetics (b), are calculated using the Chen's Peak Shape method.
- Subjects
THERMOLUMINESCENCE; GAMMA rays; LUMINESCENCE; PHOSPHORS; TRANSMISSION electron microscopes; SCANNING electron microscopes
- Publication
Oxidation Communications, 2021, Vol 44, Issue 3, p636
- ISSN
0209-4541
- Publication type
Article