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Investigation of UV‐emitting Gd 3+ ‐doped LiCaBO 3 phosphor
Author(s) -
Tamboli Sumedha,
Rajeswari B.,
Dhoble S. J.
Publication year - 2016
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.2994
Subject(s) - phosphor , electron paramagnetic resonance , photoluminescence , luminescence , analytical chemistry (journal) , materials science , dopant , scanning electron microscope , doping , spectroscopy , activator (genetics) , ion , crystal structure , quenching (fluorescence) , chemistry , fluorescence , crystallography , nuclear magnetic resonance , optics , optoelectronics , biochemistry , physics , organic chemistry , chromatography , quantum mechanics , composite material , gene
Abstract Incorporating the Gd 3+ rare earth ion in the LiCaBO 3 host lattice resulted in narrow‐band UV‐B emission peaking at 315 nm, with excitation at 274 nm. The LiCaBO 3 :Gd 3+ phosphor was synthesized via the solid‐state diffusion method. The structural, morphological and luminescence properties of this phosphor were characterized by X‐ray diffraction (XRD) analysis, scanning electron microscopy (SEM) and photoluminescence (PL) spectroscopy. Electron paramagnetic resonance (EPR) characterization of the as‐prepared phosphors is also reported here. XRD studies confirmed the crystal formation and phase purity of the prepared phosphors. A series of different dopant concentrations was synthesized and the concentration‐quenching effect was studied. Critical energy transfer distance between activator ions was determined and the mechanism governing the concentration quenching is also reported in this paper. Copyright © 2015 John Wiley & Sons, Ltd.