Photoluminescence properties of La3+-doped BaY1.94Eu0.06ZnO5 phosphor prepared using a sol–gel method

Chang, Yee‐Shin; Shih, Hung-Rung; Tsai, Mu‐Tsun; Liu, Kuan-Ting; Teoh, Lay-Gaik

doi:10.1016/j.jlumin.2014.07.024

Cited by 8 publications

(3 citation statements)

References 22 publications

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“…Many studies have shown that decreasing the oxygen vacancy concentration will contribute to the enhancement of the PL properties of phosphors, which can be performed by adding fluxes, (6) using the wet chemical method to reduce the calcination temperature, (7,8) or by doping with ions with different radii to decrease the distortion degree of the lattice symmetry. (9) Among these methods, doping with ions with different radii is the most effective.…”

Section: Introductionmentioning

confidence: 99%

Effects of La3+ Ion Doping Concentration on the Crystal Structure and Photoluminescence Properties of Y0.998Pr0.002InGe2O7 Single-phased White Light-emitting Phosphor

Teoh¹,

Wu²,

Chen³

et al. 2023

Sensors and Materials

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The raw materials of La 3+ ion-doped Y 0.998 Pr 0.002 InGe 2 O 7 phosphor were mixed by a vibration mill method, then calcined at 1200 ℃ for 10 h in air by a solid-state reaction. Regardless of the La 3+ ion doping concentration, the La 3+ ion did not change the crystal structure, but the luminescence properties including both the excitation and emission intensities did change. The saturation emission intensity excited by a deep UV light for the phosphor increased when the La 3+ ion doping content was 10 mol%. As the La 3+ ion with a large radius was introduced as a substitute for the Y 3+ ion with a small radius in the Y 0.998 Pr 0.002 InGe 2 O 7 system, an increase in compressive strain led to a decrease in oxygen vacancy concentration, which changed the emission intensity of 1 D 2 → 3 H 4 and 3 P 0 → 3 H 4 radiations for Pr 3+ ion 4f-4f transition. The Commission Internationale de L'Eclairag (CIE) color coordinates of the La 3+ iondoped Y 0.998 Pr 0.002 InGe 2 O 7 phosphor shifted slightly, but all were in the white light region at various La 3+ ion doping contents. This provides an intelligent method for improving the luminescence properties of Y 0.998 P r0.002 InGe 2 O 7 single-phased white light-emitting phosphors for white LEDs. In addition, various emission intensity ratios of the 1 D 2 → 3 H 4 and 3 P 0 → 3 H 4 radiations enable the phosphors to be applied to oxygen gas sensors.

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Section: Introductionmentioning

confidence: 99%

Effects of La3+ Ion Doping Concentration on the Crystal Structure and Photoluminescence Properties of Y0.998Pr0.002InGe2O7 Single-phased White Light-emitting Phosphor

Teoh¹,

Wu²,

Chen³

et al. 2023

Sensors and Materials

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show abstract

“…The sol-gel method requires a low synthesis temperature, achieves higher purity, mixes activators well, and produces nano-scale particle powders [17][18]. Many studies enhance the photoluminescence properties of phosphors and improve the particle morphology by flux addition or by doping with different radius ions [19][20].…”

Section: Introductionmentioning

confidence: 99%

Effects of Bi3+ Ion-Doped on the Microstructure and Photoluminescence of La0.97Pr0.03VO4 Phosphor

Chen

Shih

et al. 2021

Adv. technol. innov.

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The objective of this paper is to enhance the emission intensity of La0.97Pr0.03VO4 single-phased white light emitting phosphor. The Bi3+ ion-doped La0.97Pr0.03VO4 single-phased white light emitting phosphors are synthesized using a sol-gel method. The structure and photoluminescence properties of (La0.97-yBiy)Pr0.03VO4 (y = 0-0.05) phosphor are also examined. The XRD results show that the structure of La0.97Pr0.03VO4 phosphors with different concentrations of Bi3+ ion doping keeps the monoclinic structure. The SEM results show that the phosphor particles become smoother when the Bi3+ ion is doped. The excitation band for La0.97Pr0.03VO4 phosphor exhibits a blue shift from 320 nm to 308 nm as the Bi3+ ion contents are increased. The maximum emission intensity is achieved for a Bi3+ ion content of 0.5 mol%, which is about 30% greater than that with no Bi3+ ion doped. The CIE chromaticity coordinates are all located in the near white light region for different Bi3+ ion-doped La0.97Pr0.03VO4 phosphors.

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“…This increases the local field of the doped rare earth ions and correspondingly enhances the oscillator strength of rare-earth optical transitions. Therefore, Y 2 BaZnO 5 is an excellent host for various activator ions-doped phosphors [19][20][21][22], and has gained much attention. In this work, Er 3+ -Yb 3+ co-doped Y 2 BaZnO 5 phosphors have been prepared by solid-state reactions and the QC mechanism of Er 3+ -Yb 3+ couple in Y 2 BaZnO 5 oxide host is discussed in detail.…”

Section: Introductionmentioning

confidence: 99%

Down conversion of Er3+-Yb3+ couple in Y2BaZnO5

et al. 2016

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Er 3+-Yb 3+ co-doped Y 2 BaZnO 5 phosphors were synthesized via high temperature solid-state reaction method. The quantum cutting properties for Er 3+-Yb 3+ co-doped Y 2 BaZnO 5 phosphors have been detailedly exploited under different wavelength excitation. Unlike in fluoride host, only the Er(4 S 3/2)+Yb(2 F 7/2)→Er(4 I 13/2)+Yb(2 F 5/2) energy transfer process in Y 2 BaZnO 5 effectively performs the down-conversion, which can split an absorbed high-energy photon into two photons of 1000nm and 1550nm radiations. The quantum cutting properties of Er 3+-Yb 3+ couple in Y 2 BaZnO 5 provides meaningful reference in search of new efficient Er 3+-Yb 3+ co-doped quantum cutting phosphors.

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Photoluminescence properties of La3+-doped BaY1.94Eu0.06ZnO5 phosphor prepared using a sol–gel method

Cited by 8 publications

References 22 publications

Effects of La3+ Ion Doping Concentration on the Crystal Structure and Photoluminescence Properties of Y0.998Pr0.002InGe2O7 Single-phased White Light-emitting Phosphor

Effects of La3+ Ion Doping Concentration on the Crystal Structure and Photoluminescence Properties of Y0.998Pr0.002InGe2O7 Single-phased White Light-emitting Phosphor

Effects of Bi3+ Ion-Doped on the Microstructure and Photoluminescence of La0.97Pr0.03VO4 Phosphor

Down conversion of Er3+-Yb3+ couple in Y2BaZnO5

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