Luminescence and Thermal-Quenching Properties of Red-Emitting Ca2Al2SiO7:Sm3+ Phosphors

Ca 2 Al 2 SiO 7 : x .Sm 3+ ( x  = 0.5, 1.0, 1.5, 2.0, 2.5, and 3.5 mol.%) (CAS: x .Sm 3+ ) phosphors were synthesized by a solid-state reaction technique. The structure, photoluminescence properties and thermal stability of phosphors were investigated in detail. Results of X-ray diffraction show tha...

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Veröffentlicht in:Journal of electronic materials 2020-06, Vol.49 (6), p.3701-3707
Hauptverfasser: Son, Nguyen Manh, Tien, Do Thanh, Lien, Nguyen Thi Quynh, Quang, Vu Xuan, Trac, Nguyen Ngoc, Hong, Tran Thi, Tuyen, Ho Van
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container_issue 6
container_start_page 3701
container_title Journal of electronic materials
container_volume 49
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Tien, Do Thanh
Lien, Nguyen Thi Quynh
Quang, Vu Xuan
Trac, Nguyen Ngoc
Hong, Tran Thi
Tuyen, Ho Van
description Ca 2 Al 2 SiO 7 : x .Sm 3+ ( x  = 0.5, 1.0, 1.5, 2.0, 2.5, and 3.5 mol.%) (CAS: x .Sm 3+ ) phosphors were synthesized by a solid-state reaction technique. The structure, photoluminescence properties and thermal stability of phosphors were investigated in detail. Results of X-ray diffraction show that CAS: x .Sm 3+ materials have a single-phased tetragonal structure, and an expansion of the unit cell relates to the increasing of Sm 3+ concentration. Photoluminescence study displayed that the CAS: x .Sm 3+ phosphors reach the highest emission intensity at 1.5 mol.% Sm 3+ and achieved the luminescence quenching phenomenon a higher concentration. The dominant interaction mechanism of the concentration quenching process is determined due to the dipole–dipole interaction, and the critical transfer distance ( R c ) is 26.7 Å. The temperature dependence of photoluminescence spectra indicates that the Ca 2 Al 2 SiO 7 :Sm 3+ (1.5 mol.%) phosphor possess good thermal stability, and that the activation energy is around 0.12 eV (968 cm −1 ). Several characteristic vibrations in the 200–1000-cm −1 region were observed by Raman spectra, and the color chromaticity coordinates of the samples were also calculated and discussed.
doi_str_mv 10.1007/s11664-020-08086-x
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The structure, photoluminescence properties and thermal stability of phosphors were investigated in detail. Results of X-ray diffraction show that CAS: x .Sm 3+ materials have a single-phased tetragonal structure, and an expansion of the unit cell relates to the increasing of Sm 3+ concentration. Photoluminescence study displayed that the CAS: x .Sm 3+ phosphors reach the highest emission intensity at 1.5 mol.% Sm 3+ and achieved the luminescence quenching phenomenon a higher concentration. The dominant interaction mechanism of the concentration quenching process is determined due to the dipole–dipole interaction, and the critical transfer distance ( R c ) is 26.7 Å. The temperature dependence of photoluminescence spectra indicates that the Ca 2 Al 2 SiO 7 :Sm 3+ (1.5 mol.%) phosphor possess good thermal stability, and that the activation energy is around 0.12 eV (968 cm −1 ). 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The structure, photoluminescence properties and thermal stability of phosphors were investigated in detail. Results of X-ray diffraction show that CAS: x .Sm 3+ materials have a single-phased tetragonal structure, and an expansion of the unit cell relates to the increasing of Sm 3+ concentration. Photoluminescence study displayed that the CAS: x .Sm 3+ phosphors reach the highest emission intensity at 1.5 mol.% Sm 3+ and achieved the luminescence quenching phenomenon a higher concentration. The dominant interaction mechanism of the concentration quenching process is determined due to the dipole–dipole interaction, and the critical transfer distance ( R c ) is 26.7 Å. The temperature dependence of photoluminescence spectra indicates that the Ca 2 Al 2 SiO 7 :Sm 3+ (1.5 mol.%) phosphor possess good thermal stability, and that the activation energy is around 0.12 eV (968 cm −1 ). Several characteristic vibrations in the 200–1000-cm −1 region were observed by Raman spectra, and the color chromaticity coordinates of the samples were also calculated and discussed.</abstract><cop>New York</cop><pub>Springer US</pub><doi>10.1007/s11664-020-08086-x</doi><tpages>7</tpages></addata></record>
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subjects Characterization and Evaluation of Materials
Chemistry and Materials Science
Chromaticity
Dipole interactions
Electronics and Microelectronics
Instrumentation
Luminescence
Luminescence quenching
Materials Science
Optical and Electronic Materials
Phosphors
Photoluminescence
Quenching
Raman spectra
Solid State Physics
Temperature dependence
Thermal stability
Unit cell
title Luminescence and Thermal-Quenching Properties of Red-Emitting Ca2Al2SiO7:Sm3+ Phosphors
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