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Title: Synthesis, energy transfer and luminescence properties of Ca{sub 2}MgWO{sub 6}:Sm{sup 3+}, Bi{sup 3+} phosphor

Abstract

Graphical abstract: PL spectra of Ca{sub 2}MgWO{sub 6}:Sm{sup 3+} and Ca{sub 2}MgWO{sub 6}:Sm{sup 3+}, Bi{sup 3+} phosphors with excitation at 407 nm, and the corresponding CIE chromaticity diagram and chromaticity coordinates. - Highlights: • Novel Ca{sub 2}MgWO{sub 6}:Sm{sup 3+}, Bi{sup 3+} phosphor is synthesized by solid-state reaction method in air. • Emission intensity of Ca{sub 2}MgWO{sub 6}:Sm{sup 3+} phosphor is enhanced ∼2 times after co-doped Bi{sup 3+} ion. • Charge compensation and energy transfer may be explained via luminescence properties. • Luminous mechanism is analyzed by energy level diagrams of WO{sub 6}{sup 6−} group, Sm{sup 3+} and Bi{sup 3+} ions. - Abstract: Novel Ca{sub 2}MgWO{sub 6}:Sm{sup 3+}, Bi{sup 3+} phosphor is synthesized by solid-state reaction method in air. Host Ca{sub 2}MgWO{sub 6} with excitation 300 nm emits blue light. Ca{sub 2}MgWO{sub 6}:Bi{sup 3+} phosphor with excitation 300 and 338 nm emits yellow light. Ca{sub 2}MgWO{sub 6}:Sm{sup 3+} phosphor with excitation 300 nm exhibits tunable emission from blue to red light by increasing Sm{sup 3+} doping concentration from 0 to 8 mol%, however, only emits red light with excitation 407 nm. Ca{sub 2}MgWO{sub 6}:Sm{sup 3+}, Bi{sup 3+} phosphor with excitation 300 and 338 nm emits red light. The optimal Sm{sup 3+}more » doping concentration is ∼5 mol% in Ca{sub 2}MgWO{sub 6}:Sm{sup 3+} phosphor. After Bi{sup 3+} ion is co-doped, luminescence properties of Ca{sub 2}MgWO{sub 6}:Sm{sup 3+} phosphor can be improved obviously because of Bi{sub 2}O{sub 3} as fluxing agent role and energy transfer from Bi{sup 3+} to Sm{sup 3+} ions. The possible luminous mechanism of Ca{sub 2}MgWO{sub 6}:Sm{sup 3+}, Bi{sup 3+} phosphor is analyzed and explained by simplified energy level diagrams of WO{sub 6}{sup 6−} group, Bi{sup 3+} and Sm{sup 3+} ions.« less

Authors:
 [1]; ;  [1];  [2];  [1];  [2];  [1]
  1. College of Mathematics and Physics, Jinggangshan University, Ji’an 343009 (China)
  2. College of Mechanical Manufacture and Automation, Jinggangshan University, Ji’an 343009 (China)
Publication Date:
OSTI Identifier:
22581616
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 81; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AIR; BISMUTH IONS; BISMUTH OXIDES; CALCIUM TUNGSTATES; CONCENTRATION RATIO; DIAGRAMS; DOPED MATERIALS; EMISSION SPECTRA; ENERGY LEVELS; ENERGY TRANSFER; EXCITATION; LUMINESCENCE; MAGNESIUM COMPOUNDS; OPTICAL PROPERTIES; PHOSPHORS; SAMARIUM IONS; SOLIDS; SYNTHESIS; VISIBLE RADIATION

Citation Formats

Cao, Renping, E-mail: jxcrp@163.com, Xu, Haidong, Luo, Wenjie, Luo, Zhiyang, Guo, Siling, Xiao, Fen, and Ao, Hui. Synthesis, energy transfer and luminescence properties of Ca{sub 2}MgWO{sub 6}:Sm{sup 3+}, Bi{sup 3+} phosphor. United States: N. p., 2016. Web. doi:10.1016/J.MATERRESBULL.2016.04.023.
Cao, Renping, E-mail: jxcrp@163.com, Xu, Haidong, Luo, Wenjie, Luo, Zhiyang, Guo, Siling, Xiao, Fen, & Ao, Hui. Synthesis, energy transfer and luminescence properties of Ca{sub 2}MgWO{sub 6}:Sm{sup 3+}, Bi{sup 3+} phosphor. United States. doi:10.1016/J.MATERRESBULL.2016.04.023.
Cao, Renping, E-mail: jxcrp@163.com, Xu, Haidong, Luo, Wenjie, Luo, Zhiyang, Guo, Siling, Xiao, Fen, and Ao, Hui. 2016. "Synthesis, energy transfer and luminescence properties of Ca{sub 2}MgWO{sub 6}:Sm{sup 3+}, Bi{sup 3+} phosphor". United States. doi:10.1016/J.MATERRESBULL.2016.04.023.
@article{osti_22581616,
title = {Synthesis, energy transfer and luminescence properties of Ca{sub 2}MgWO{sub 6}:Sm{sup 3+}, Bi{sup 3+} phosphor},
author = {Cao, Renping, E-mail: jxcrp@163.com and Xu, Haidong and Luo, Wenjie and Luo, Zhiyang and Guo, Siling and Xiao, Fen and Ao, Hui},
abstractNote = {Graphical abstract: PL spectra of Ca{sub 2}MgWO{sub 6}:Sm{sup 3+} and Ca{sub 2}MgWO{sub 6}:Sm{sup 3+}, Bi{sup 3+} phosphors with excitation at 407 nm, and the corresponding CIE chromaticity diagram and chromaticity coordinates. - Highlights: • Novel Ca{sub 2}MgWO{sub 6}:Sm{sup 3+}, Bi{sup 3+} phosphor is synthesized by solid-state reaction method in air. • Emission intensity of Ca{sub 2}MgWO{sub 6}:Sm{sup 3+} phosphor is enhanced ∼2 times after co-doped Bi{sup 3+} ion. • Charge compensation and energy transfer may be explained via luminescence properties. • Luminous mechanism is analyzed by energy level diagrams of WO{sub 6}{sup 6−} group, Sm{sup 3+} and Bi{sup 3+} ions. - Abstract: Novel Ca{sub 2}MgWO{sub 6}:Sm{sup 3+}, Bi{sup 3+} phosphor is synthesized by solid-state reaction method in air. Host Ca{sub 2}MgWO{sub 6} with excitation 300 nm emits blue light. Ca{sub 2}MgWO{sub 6}:Bi{sup 3+} phosphor with excitation 300 and 338 nm emits yellow light. Ca{sub 2}MgWO{sub 6}:Sm{sup 3+} phosphor with excitation 300 nm exhibits tunable emission from blue to red light by increasing Sm{sup 3+} doping concentration from 0 to 8 mol%, however, only emits red light with excitation 407 nm. Ca{sub 2}MgWO{sub 6}:Sm{sup 3+}, Bi{sup 3+} phosphor with excitation 300 and 338 nm emits red light. The optimal Sm{sup 3+} doping concentration is ∼5 mol% in Ca{sub 2}MgWO{sub 6}:Sm{sup 3+} phosphor. After Bi{sup 3+} ion is co-doped, luminescence properties of Ca{sub 2}MgWO{sub 6}:Sm{sup 3+} phosphor can be improved obviously because of Bi{sub 2}O{sub 3} as fluxing agent role and energy transfer from Bi{sup 3+} to Sm{sup 3+} ions. The possible luminous mechanism of Ca{sub 2}MgWO{sub 6}:Sm{sup 3+}, Bi{sup 3+} phosphor is analyzed and explained by simplified energy level diagrams of WO{sub 6}{sup 6−} group, Bi{sup 3+} and Sm{sup 3+} ions.},
doi = {10.1016/J.MATERRESBULL.2016.04.023},
journal = {Materials Research Bulletin},
number = ,
volume = 81,
place = {United States},
year = 2016,
month = 9
}
  • Graphical abstract: Novel LiSrPO4:Dy{sup 3+} phosphors were synthesized by solid-state reaction, and Dy{sup 3+}-doped concentration dependent luminescence properties, concentration quenching effect and the decay times were investigated in detail. Highlights: {yields} LiSrPO{sub 4}:Dy{sup 3+} could be excited by UV light and exhibited blue and yellow emission. {yields} Concentration quenching effect of LiSrPO{sub 4}:Dy{sup 3+} samples were investigated in detail. {yields} Decay times are estimated to be 0.57-0.89 ms for Dy{sup 3+} in LiSrPO{sub 4} host. -- Abstract: Novel LiSrPO{sub 4}:Dy{sup 3+} phosphors for white light-emitting diodes (w-LEDs) were synthesized by the conventional solid-state reaction. X-ray powder diffraction (XRD) analysis confirmedmore » the phase formation of LiSrPO{sub 4}:Dy{sup 3+} materials. Luminescence properties results showed that the phosphor could be efficiently excited by the UV-vis light region from 250 to 460 nm, and it exhibited blue (483 nm) and yellow (574 nm) emission corresponding to {sup 4}F{sub 9/2} {yields} {sup 6}H{sub 15/2} transitions and {sup 4}F{sub 9/2} {yields} {sup 6}H{sub 13}/{sub 2} transitions, respectively. The luminescence intensity of LiSrPO{sub 4}:xDy{sup 3+} phosphor firstly increased and then decreased with increasing Dy{sup 3+} concentration, and reached the maximum at x = 0.03. It was found that concentration quenching occurred as a result of dipole-dipole interaction according to the Dexter's theory. The decay time was also determined for various concentrations of Dy{sup 3+} in LiSrPO{sub 4}.« less
  • The KSrPO{sub 4}:Eu phosphor was synthesized via solid state method. The structural and morphological characterizations were done through XRD (X-ray diffraction) and SEM (Scanning Electronic Microscope). Additionally, the photoluminescence (PL), thermoluminescence (TL) and optically Stimulated luminescence (OSL) properties of powder KSrPO{sub 4}:Eu were studied. The PL spectra show blue emission under near UV excitation. It was advocated that KSrPO{sub 4}:Eu phosphor not only show OSL sensitivity (0.47 times) but also gives faster decay in OSL signals than that of Al{sub 2}O{sub 3}:C (BARC) phosphor. The TL glow curve consist of two shoulder peaks and the kinetics parameters such as activationmore » energy and frequency factors were determined by using peak shape method and also photoionization cross-sections of prepared phosphor was calculated. The radiation dosimetry properties such as minimum detectable dose (MDD), dose response and reusability were reported.« less
  • Nearly monodisperse, homogeneous and well-defined one-dimensional Tb{sub (1-x)}(OH){sub 3}:xEu{sup 3+} (x=0-3 mol%) nanorods have been prepared through hydrothermal method. The size of the Tb(OH){sub 3}:Eu{sup 3+} rods could be modulated from nano- to micro-scale by using different amount of ammonia solution. They present highly crystallinity in spite of the moderate reaction temperature. Under ultraviolet excitation into the f->f transition of Tb{sup 3+} at 382 nm, Tb(OH){sub 3} samples show the characteristic emission of Tb{sup 3+} corresponding to {sup 5}D{sub 4}->{sup 7}F{sub 6,5,4,3} transitions; whereas Tb(OH){sub 3}:Eu{sup 3+} samples mainly exhibit the characteristic emission of Eu{sup 3+} corresponding to {sup 5}D{submore » 0}->{sup 7}F{sub 1,2,4} transitions due to an efficient energy transfer occurs from Tb{sup 3+} to Eu{sup 3+}. The increase of Eu{sup 3+} concentration leads to the increase of the energy transfer efficiency from Tb{sup 3+} to Eu{sup 3+}. The PL colors of Tb(OH){sub 3}:xEu{sup 3+} phosphors can be easily tuned from green, yellow, orange, to red by changing the doping concentration (x) of Eu{sup 3+}. - Graphical abstract: The colors of Tb(OH){sub 3}:xEu{sup 3+} phosphors can be easily tuned from green, yellow, orange, to red due to different energy transfer occurs from Tb{sup 3+} to Eu{sup 3+}.« less
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  • The phase development and luminescence properties, under both X-ray and ultraviolet excitation, of the lithium orthotantalate-lithium orthoniobate system, Li{sub 3}Ta{sub 1{minus}x}Nb{sub x}O{sub 4} for x = 0 to 1, were examined. Using a flux synthesis technique, it was found that the levels of Nb-doping in monoclinic Li{sub 3}TaO{sub 4} and of Ta-doping in cubic Li{sub 3}NbO{sub 4} are higher than previously reported. Under 30 kVp molybdenum X-ray excitation, Li{sub 3}Ta{sub 1{minus}x}Nb{sub 4}O{sub 4} is an efficient blue-emitting phosphor with broadband emission, peaking in the range of 390 to 435 nm. For x = 0 to 0.1, the overall luminescence efficiencymore » is comparable to, or better than, a commercial calcium tungstate, CaWO{sub 4}, Hi-Plus material. The composition Li{sub 3}Ta{sub 0.995}NbO{sub 4} demonstrates an overall luminescence efficiency that makes this phosphor 45% brighter than CaWO{sub 4}Hi-Plus, thereby making it a potentially attractive candidate for use in medical diagnostic imaging systems. Under ultraviolet excitation, broadband blue emission is also observed. For all the Li{sub 3}Ta{sub 1{minus}x}Nb{sub x}O{sub 4} (x > 0) solid solutions, the emission peak maximums agree well with those seen under X-ray excitation and are the result of Nb{sup 5+} emission. 13 refs., 5 figs.« less