Abstract
The present paper reports the effect of europium concentration on photoluminescence (PL) and thermoluminescence (TL) studies of Eu3+ doped Y4Al2O9 phosphor using inorganic materials like yttrium oxide (Y2O3), aluminium oxide (Al2O3), boric acid (H3BO3) as a flux, and europium oxide (Eu2O3). The sample was prepared by the modified solid state reaction method, which is the most suitable for large-scale production. The prepared phosphor sample was characterized using X-ray diffraction (XRD), field emission gun scanning electron microscopy (FEGSEM), Fourier transform infrared spectroscopy (FTIR), photoluminescence (PL), thermoluminescence (TL), and CIE techniques. The PL emission was observed in the range of 467, 535, 591, 611, 625, and 629 nm for the Y4Al2O9 phosphor doped with Eu3+ (0.1 mol% to 2.5 mol%). Excitation spectrum was found at 237 and 268 nm. Sharp peaks were found around 591, 611, and 625 nm with high intensity. From the XRD data, using Scherer’s formula, the calculated average crystallite size of Eu3+ doped Y4Al2O9 the phosphor is around 55 nm. Thermoluminescence study was carried out for the phosphor with UV irradiation. The present phosphor can act as single host for red light emission in display devices.
Highlights
During the past decades, nanostructured materials have attracted considerable attention for their novel and enhanced properties; for example, the Mn doped ZnS phosphor can yield both high luminescent efficiencies and short lifetime [1, 2]
Rare earth doped yttrium aluminium garnet (YAG) is employed as a phosphor [8, 9]
The size of the particle has been computed from the full width half maximum (FWHM) of the intense peak using Debyz Scherer formula
Summary
During the past decades, nanostructured materials have attracted considerable attention for their novel and enhanced properties; for example, the Mn doped ZnS phosphor can yield both high luminescent efficiencies and short lifetime [1, 2]. Wang [15] have studied the VUV excitation and photoluminescence characteristics of this Y3.8Al2O9:Re0.2 (Re = Tb3+, Eu3+) phosphor synthesized via a citric-gel method. This phosphor shows strong absorption in VUV region. A new modified solid state reaction method was used to synthesize Y4Al2O9:Eu3+ phosphor. Indian Journal of Materials Science perfectly combines the merits of solid state reaction processing and a high-temperature combustion process. This synthesis has the advantages of inexpensive precursors, convenient process control, and large mass production. The structure, morphology, high temphotoluminescence, and thermoluminescence study of Y4Al2O9:Eu3+ phosphor is investigated in detail
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