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Title: Simultaneous influence of dual sensitizers on photo-physical properties in Dy3+ activated YVO4 phosphors
Authors: Nayak, Priyanka
Nanda, Sushri Sangita
Dash, S.
Keywords: Zircon structure
Rare Earth
Photo luminescence
Energy Transfer
Yellow phosphor
Issue Date: Dec-2022
Citation: 4th International Conference on Processing and Characterization of Materials and 12th National Conference on Processing and Characterization of Materials (ICPCM), NIT Rourkela, 9th-11th December 2022
Abstract: A series of doubly sensitized and Dy3+ activated YVO4 (YVO4: 3at%Dy3+ , 7at%Bi3+ , xMn2+) phosphors have been synthesized adopting the high temperature solid state reaction route. The detailed study on the structural, optical and photo-physical properties have been carried out through various analytical techniques to investigate the simultaneous effect of activator and sensitizers on the host matrix. Reitveld refinement of the X-ray Diffraction (XRD) profiles with low χ2 values authenticate better crystallinity with a tetragonal zircon type structure. The microstructural particle morphology has been explored through scanning electron microscopy (SEM) and the physio-chemical purity has been probed through the vibrational spectroscopy analysis. The emission spectral profile reveals that the Bi3+ sensitized phosphor exhibits broad emission band in the blue-violet region corresponding to the 3P1→1S0 transition along with the yellow emission of Dy3+ ( 4F9/2→6H13/2). Furthermore, on substituting Mn2+, a far red emission is observed with an efficient energy transfer to the Dy3+ ions, resulting in enhancement of the emission intensity. Thus, Bi3+ and Mn2+ doping reflects in broadening the emission spectra on a wide range of visible spectra, thereby increasing the applicability of the said phosphors.
Description: Copyright belongs to proceeding publisher
Appears in Collections:Conference Papers

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