Synthesis and luminescence characteristics of nitride Ca1.4Al2.8Si9.2N16:Ce3+, Li+for light-emitting devices and field emission displays

Wu, Quansheng; Wang, Xicheng; Zhao, Zhengyan; Wang, Chuang; Li, Yanyan; Mao, Aijun; Wang, Yuhua

doi:10.1039/c4tc01131g

Cited by 31 publications

(9 citation statements)

References 44 publications

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“…This further proves that there is a single luminescence centre. 53 This result agrees well with the same emission spectra under different excitations. This also indicates that Eu 2+ ions in the SrSiAl 2 O 3 N 2 lattice occupy only one kind of crystallographic site, the Sr 2+ site, which consists of the crystal structure of SrSiAl 2 O 3 N 2 , where only one Sr 2+ ion is available for the substitution by Eu 2+ ions.…”

Section: Pl Propertiessupporting

confidence: 89%

Synthesis, structure, and luminescence properties of SrSiAl₂O₃N₂:Eu²⁺ phosphors for light-emitting devices and field emission displays

Wang

Zhao

et al. 2015

Dalton Trans.

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A series of SrSiAl2O3N2:Eu(2+) (0.005 ≤x≤ 0.05) phosphors were successfully synthesized through a pressureless, facile, and efficient solid state route. The crystal structure, band structure, and their photoluminescence and cathodoluminescence properties were investigated in detail. The phosphors exhibit rod shape morphology with a uniform Eu(2+) distribution. Under n-UV excitation the emission spectra shift from 477 to 497 nm with an increase of Eu(2+) concentration. The concentration quenching mechanism of Eu(2+) emission was dominated by the dipole-dipole interaction. The thermal stability is comparable to that of the commercial Ba2SiO4:Eu(2+) phosphor. The phosphor also exhibits high current saturation and high resistance under low voltage electron bombardment. All the results indicate that the SrSiAl2O3N2:Eu(2+) phosphors can be considered as candidates for application in both white LEDs and FEDs.

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Section: Pl Propertiessupporting

confidence: 89%

Synthesis, structure, and luminescence properties of SrSiAl₂O₃N₂:Eu²⁺ phosphors for light-emitting devices and field emission displays

Wang

Zhao

et al. 2015

Dalton Trans.

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“…The inset gives a clear view of the variation trend of intensity monitored at 480 and 574 nm, respectively. It almost keeps invariable with a slight increase which could be caused by the increase in the specific surface area . It is well‐known that CL intensity will increase with the increasing bombarding surface area, and this process is accompanied with degradation behavior under continuous electron radiation.When the effect of specific surface area increasing is superior to that of degradation, it performs an increasing CL intensity, and vice versa.…”

Section: Resultsmentioning

confidence: 99%

A Single‐Phase Phosphor NaLa₉ (GeO₄)₆O₂: Tm³⁺, Dy³⁺ for Near Ultraviolet‐White LED and Field‐Emission Display

Cao

Ding

2016

J. Am. Ceram. Soc.

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Single‐phase white‐light‐emitting phosphors NaLa9(1−x−y) (GeO4)6O2: xTm3+, yDy3+ (NLGO: xTm3+, yDy3+) have been synthesized by a traditional solid‐state reaction method. The powder X‐ray diffraction (XRD), photoluminescence (PL), PL excitation (PLE) spectra, fluorescence decay curves, chromaticity coordinates, correlated color temperature (CCT), and the cathodoluminescence (CL) properties of the obtained phosphors are measured and discussed in detail. It is discovered that the series samples could be color‐tunable (from blue to yellow) by tuning the doping content of Dy3+ with a fixed Tm3+ content excited at 357 nm and white light (0.341, 0.324) could be obtained with the CCT of 5079 K. A NLGO: 0.01Tm3+, 0.02Dy3+ is studied carefully as representative. The main emissions of Tm3+ (453 nm, 1D2–3F4) and Dy3+ (478 nm, 4F9/2–6H15/2; 572 nm, 4F9/2–6H13/2) make it emit white light with good thermal stability (67% of the initial till 523 K). The energy transfer from Tm3+ to Dy3+ is noticed and further research has been done to explain the enhancement of Dy3+ emission and the excellent thermal stability. It also keeps stable under continuous electron bombardment with high intensity. All of these indicate that it could be a suitable candidate for white‐emitting phosphor applied for near ultraviolet‐white light‐emitting diode (NUV‐WLED) and field‐emission display (FED).

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“…Likewise, under the constant filament current (50 mA), The CL intensity is also enhanced gradually with the applied voltage increasing from 1.0 to 5.0 kV (shown in Figure B). Generally, the electrons are able to gain higher energy under the larger applied voltage and filament current, and then they can penetrate more deeply into the phosphor body and stimulate not only a larger electron‐beam current density, but also a higher CL intensity . The degradation behavior of NBY: Ce 3+ , Tb 3+ under successive low‐voltage electron‐beam excitation was also investigated (as illustrated in Figure C).…”

Section: Resultsmentioning

confidence: 99%

NaBaY(BO₃)₂:Ce³⁺,Tb³⁺: A novel sharp green‐emitting phosphor used for WLED and FEDs

et al. 2018

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A new borate phosphor NaBaY(BO3)2: Ce3+, Tb3+ (NBY:Ce3+, Tb3+) was successfully synthesized under low temperature designed to put into application in the fields of ultraviolet (UV)‐excited light emitting diodes (LEDs) and field emission displays (FEDs). The structure distortion between Ce3+, Tb3+ single‐ and co‐doping NBY was discussed by X‐ray powder diffraction Rietveld refinement, high‐resolution transmission electron microscopy (HRTEM) and spectra. NBY: Ce3+, Tb3+ presents a wide absorption band ranging from 310 to 400 nm and efficient green emission (λmax = 542 nm) with a full‐width at half‐maximum of 3.3 nm. The remarkable thermal stability has also been tested, indicating that the intensity at 200°C is still beyond 70% of the original intensity. In addition, a white LED device was manufactured by connecting a 370 nm UV chip with a blend of BaMaAl10O17: Eu2+ (BAM: Eu2+), NBY: Ce3+, Tb3+ and CaAlSiN3: Eu2+. The color coordinate, correlated color temperature and color rendering index of the manufactured LED device were (0.335, 0.347), 5511 K and 80.16, respectively. Meanwhile, the cathodoluminescence (CL) spectra under the various conditions of probe currents and accelerating voltages were also analyzed. Through successive excitation of low‐voltage electron‐beam, the wonderful performances of degradation property and color stability were obtained. These results suggest that the green‐emitting NBY: Ce3+, Tb3+ phosphor has the prospect of becoming applications in white UV LEDs and FEDs.

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Synthesis and luminescence characteristics of nitride Ca_1.4Al_2.8Si_9.2N₁₆:Ce³⁺, Li⁺for light-emitting devices and field emission displays

Cited by 31 publications

References 44 publications

Synthesis, structure, and luminescence properties of SrSiAl₂O₃N₂:Eu²⁺ phosphors for light-emitting devices and field emission displays

Synthesis, structure, and luminescence properties of SrSiAl₂O₃N₂:Eu²⁺ phosphors for light-emitting devices and field emission displays

A Single‐Phase Phosphor NaLa₉ (GeO₄)₆O₂: Tm³⁺, Dy³⁺ for Near Ultraviolet‐White LED and Field‐Emission Display

NaBaY(BO₃)₂:Ce³⁺,Tb³⁺: A novel sharp green‐emitting phosphor used for WLED and FEDs

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Synthesis and luminescence characteristics of nitride Ca1.4Al2.8Si9.2N16:Ce3+, Li+for light-emitting devices and field emission displays

Cited by 31 publications

References 44 publications

Synthesis, structure, and luminescence properties of SrSiAl2O3N2:Eu2+ phosphors for light-emitting devices and field emission displays

Synthesis, structure, and luminescence properties of SrSiAl2O3N2:Eu2+ phosphors for light-emitting devices and field emission displays

A Single‐Phase Phosphor NaLa9 (GeO4)6O2: Tm3+, Dy3+ for Near Ultraviolet‐White LED and Field‐Emission Display

NaBaY(BO3)2:Ce3+,Tb3+: A novel sharp green‐emitting phosphor used for WLED and FEDs

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Synthesis and luminescence characteristics of nitride Ca_1.4Al_2.8Si_9.2N₁₆:Ce³⁺, Li⁺for light-emitting devices and field emission displays

Synthesis, structure, and luminescence properties of SrSiAl₂O₃N₂:Eu²⁺ phosphors for light-emitting devices and field emission displays

Synthesis, structure, and luminescence properties of SrSiAl₂O₃N₂:Eu²⁺ phosphors for light-emitting devices and field emission displays

A Single‐Phase Phosphor NaLa₉ (GeO₄)₆O₂: Tm³⁺, Dy³⁺ for Near Ultraviolet‐White LED and Field‐Emission Display

NaBaY(BO₃)₂:Ce³⁺,Tb³⁺: A novel sharp green‐emitting phosphor used for WLED and FEDs