2022
DOI: 10.1016/j.jallcom.2021.163109
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Structure and luminescent properties of Dy3+ activated NaLa9(SiO4)6O2 yellow-emitting phosphors for application in white LEDs

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Cited by 38 publications
(11 citation statements)
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“…of Monastir, Unit of Materials and Organic Synthesis, University of Monastir, 5019, Tunisia c Institute of Microstructure Technology, Karlsruhe Institute of Technology, Hermannvon-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany surrounding local environment of the Dy 3+ ions and it is possible to change the ratio of yellow to blue (Y/B) emission intensities and produce white light using Dy 3+ doped luminophores. 15,16 The Y/B ratio depends on the level of Dy 3+ doping and the structure of the host matrix (i.e., the symmetry of the point group for the Dy 3+ ion sites). 17 The emission intensity of the 4 F 9/2 / 6 H 13/2 transition is greater than that of the 4 F 9/2 / 6 H 15/2 transition (resulting in yellow luminescence) for the case where Dy 3+ ions localize to the low-symmetry sites, and vice versa.…”
Section: Introductionmentioning
confidence: 99%
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“…of Monastir, Unit of Materials and Organic Synthesis, University of Monastir, 5019, Tunisia c Institute of Microstructure Technology, Karlsruhe Institute of Technology, Hermannvon-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany surrounding local environment of the Dy 3+ ions and it is possible to change the ratio of yellow to blue (Y/B) emission intensities and produce white light using Dy 3+ doped luminophores. 15,16 The Y/B ratio depends on the level of Dy 3+ doping and the structure of the host matrix (i.e., the symmetry of the point group for the Dy 3+ ion sites). 17 The emission intensity of the 4 F 9/2 / 6 H 13/2 transition is greater than that of the 4 F 9/2 / 6 H 15/2 transition (resulting in yellow luminescence) for the case where Dy 3+ ions localize to the low-symmetry sites, and vice versa.…”
Section: Introductionmentioning
confidence: 99%
“…12–14 Therefore, the relative intensity of the yellow emission is responsive to the surrounding local environment of the Dy 3+ ions and it is possible to change the ratio of yellow to blue (Y/B) emission intensities and produce white light using Dy 3+ doped luminophores. 15,16 The Y/B ratio depends on the level of Dy 3+ doping and the structure of the host matrix ( i.e. , the symmetry of the point group for the Dy 3+ ion sites).…”
Section: Introductionmentioning
confidence: 99%
“…When Dy 3+ is present at a site with higher symmetry, the blue colour emission that corresponds to the 4 F9/2 → 6 H15/2 transition is quite strong. Initially, UV light (i.e., 254, 350, and 359 nm) is typically employed as an excitation source for Dy 3+ , although blue light has become more prevalent in recent years [29]. As a result, unique-phase activation of Dy 3+ ions in the host material with yellow and blue emission may generate white light when excited by ultraviolet or near-ultraviolet radiation [30].…”
Section: Introductionmentioning
confidence: 99%
“…Rare earth-doped materials have attracted considerable attention in recent years. They constitute promising hosts for technological applications in optical amplifiers, [1][2][3][4] solar cells, [5][6][7][8] lightemitting diodes (LEDs), [9][10][11][12][13][14][15] solid-state lasers, [16][17][18] up-conversion materials, [19][20][21] photonic devices, [22][23][24] nanothermometers, [25][26][27] and biomarkers for nanomedicine. [28][29][30][31] In the illumination and energy fields, white light-emitting diode (w-LED) devices are expected to become a major light source in the coming decades: w-LEDs present a long lifetime as well as high illumination efficiency and brightness, are reliable and environmentally friendly, provide flexible color mixing, and have a small volume, just to mention some of their outstanding advantages.…”
Section: Introductionmentioning
confidence: 99%