Priyanshu Upadhyay - Academia.edu (original) (raw)

Uploads

Papers by Priyanshu Upadhyay

Research paper thumbnail of Photoluminescence and Thermoluminescence Study of Europium Doped YAM Phosphor

Paper reports the photoluminescence and thermoluminescence analysis of europium doped Y4Al2O9 pho... more Paper reports the photoluminescence and thermoluminescence analysis of europium doped Y4Al2O9 phosphor for variable concentration of Eu 3+ . The sample was prepared by the conventional solid state reaction method, which is the most suitable for large-scale production. The prepared phosphor sample was characterized using X-Ray Diffraction (XRD), Photoluminescence (PL), Thermoluminescence (TL) and CIE techniques. The PL emission was observed in 613nm which is dominant peak gives the intense red emission for the Y4Al2O9 phosphor doped with Eu 3+ (0.2 mol% to 2 mol%). Excitation spectrum found at 254nm. The emission spectrum of Eu 3+ ions consists mainly due to the transitions from the 5 D0 level to the levels 7 FJ (J=0, 1, 2, 3, 4) of Eu ions. The dependence of luminescence intensity on Eu concentration shows concentration quenching after 2mol% of europium. Thermoluminescence study was carried out for the phosphor with UV irradiation. Kinetic parameter was calculated by CGCD technique.

Research paper thumbnail of Photoluminescence and Thermoluminescence Study of Europium Doped YAM Phosphor

Paper reports the photoluminescence and thermoluminescence analysis of europium doped Y4Al2O9 pho... more Paper reports the photoluminescence and thermoluminescence analysis of europium doped Y4Al2O9 phosphor for variable concentration of Eu 3+ . The sample was prepared by the conventional solid state reaction method, which is the most suitable for large-scale production. The prepared phosphor sample was characterized using X-Ray Diffraction (XRD), Photoluminescence (PL), Thermoluminescence (TL) and CIE techniques. The PL emission was observed in 613nm which is dominant peak gives the intense red emission for the Y4Al2O9 phosphor doped with Eu 3+ (0.2 mol% to 2 mol%). Excitation spectrum found at 254nm. The emission spectrum of Eu 3+ ions consists mainly due to the transitions from the 5 D0 level to the levels 7 FJ (J=0, 1, 2, 3, 4) of Eu ions. The dependence of luminescence intensity on Eu concentration shows concentration quenching after 2mol% of europium. Thermoluminescence study was carried out for the phosphor with UV irradiation. Kinetic parameter was calculated by CGCD technique.

Log In