Abnormal reduction of Eu3+ to Eu2+ in Sr5(PO4)3Cl:Eu phosphor and its enhanced red emission by the charge compensation

Jiahui Chen, Yujun Liang, Yingli Zhu, Shiqi Liu, Haoran Li, Wen Lei

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A series of Eu doped and charge compensated Sr5(PO4)3Cl phosphors have been synthesized via a solid-state reaction in air atmosphere. The XRD patterns and the Rietveld refinement confirmed that the obtained samples were pure phases. The photoluminescence properties of Sr5(PO4)3Cl:Eu phosphors exhibited that Eu3+ could be reduced to Eu2+ in an air atmosphere, and the corresponding mechanism of abnormal reduction of Eu3+ to Eu2+ had been discussed. Meanwhile, the enhancement in the PL intensity of red emission and the thermal stability of phosphors was observed upon co-doping via the charge balance strategies of (a) 2Sr2+ = Eu3+ + R+ (R = Li, Na and K), (b) Eu3+ + Si4+ = Sr2+ + P5+ and (c) 3Sr2+ = vacancy + 2Eu3+, among which Na+ ions had the optimized charge compensation effect. The mechanisms between different charge compensation methods and the improvement in PL intensities of Eu3+ were also analyzed.

Original languageEnglish
Article number116569
JournalJournal of Luminescence
Volume214
DOIs
Publication statusPublished - 1 Oct 2019

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Atmosphere
Phosphors
phosphors
Air
Least-Squares Analysis
atmospheres
Rietveld refinement
Hot Temperature
air
Ions
Solid state reactions
Vacancies
Photoluminescence
Thermodynamic stability
thermal stability
Doping (additives)
solid state
photoluminescence
augmentation
Compensation and Redress

Cite this

Chen, Jiahui ; Liang, Yujun ; Zhu, Yingli ; Liu, Shiqi ; Li, Haoran ; Lei, Wen. / Abnormal reduction of Eu3+ to Eu2+ in Sr5(PO4)3Cl:Eu phosphor and its enhanced red emission by the charge compensation. In: Journal of Luminescence. 2019 ; Vol. 214.
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title = "Abnormal reduction of Eu3+ to Eu2+ in Sr5(PO4)3Cl:Eu phosphor and its enhanced red emission by the charge compensation",
abstract = "A series of Eu doped and charge compensated Sr5(PO4)3Cl phosphors have been synthesized via a solid-state reaction in air atmosphere. The XRD patterns and the Rietveld refinement confirmed that the obtained samples were pure phases. The photoluminescence properties of Sr5(PO4)3Cl:Eu phosphors exhibited that Eu3+ could be reduced to Eu2+ in an air atmosphere, and the corresponding mechanism of abnormal reduction of Eu3+ to Eu2+ had been discussed. Meanwhile, the enhancement in the PL intensity of red emission and the thermal stability of phosphors was observed upon co-doping via the charge balance strategies of (a) 2Sr2+ = Eu3+ + R+ (R = Li, Na and K), (b) Eu3+ + Si4+ = Sr2+ + P5+ and (c) 3Sr2+ = vacancy + 2Eu3+, among which Na+ ions had the optimized charge compensation effect. The mechanisms between different charge compensation methods and the improvement in PL intensities of Eu3+ were also analyzed.",
keywords = "Abnormal reduction, Charge compensation, Phosphor, Sr(PO)Cl:Eu, Thermal stability",
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Abnormal reduction of Eu3+ to Eu2+ in Sr5(PO4)3Cl:Eu phosphor and its enhanced red emission by the charge compensation. / Chen, Jiahui; Liang, Yujun; Zhu, Yingli; Liu, Shiqi; Li, Haoran; Lei, Wen.

In: Journal of Luminescence, Vol. 214, 116569, 01.10.2019.

Research output: Contribution to journalArticle

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T1 - Abnormal reduction of Eu3+ to Eu2+ in Sr5(PO4)3Cl:Eu phosphor and its enhanced red emission by the charge compensation

AU - Chen, Jiahui

AU - Liang, Yujun

AU - Zhu, Yingli

AU - Liu, Shiqi

AU - Li, Haoran

AU - Lei, Wen

PY - 2019/10/1

Y1 - 2019/10/1

N2 - A series of Eu doped and charge compensated Sr5(PO4)3Cl phosphors have been synthesized via a solid-state reaction in air atmosphere. The XRD patterns and the Rietveld refinement confirmed that the obtained samples were pure phases. The photoluminescence properties of Sr5(PO4)3Cl:Eu phosphors exhibited that Eu3+ could be reduced to Eu2+ in an air atmosphere, and the corresponding mechanism of abnormal reduction of Eu3+ to Eu2+ had been discussed. Meanwhile, the enhancement in the PL intensity of red emission and the thermal stability of phosphors was observed upon co-doping via the charge balance strategies of (a) 2Sr2+ = Eu3+ + R+ (R = Li, Na and K), (b) Eu3+ + Si4+ = Sr2+ + P5+ and (c) 3Sr2+ = vacancy + 2Eu3+, among which Na+ ions had the optimized charge compensation effect. The mechanisms between different charge compensation methods and the improvement in PL intensities of Eu3+ were also analyzed.

AB - A series of Eu doped and charge compensated Sr5(PO4)3Cl phosphors have been synthesized via a solid-state reaction in air atmosphere. The XRD patterns and the Rietveld refinement confirmed that the obtained samples were pure phases. The photoluminescence properties of Sr5(PO4)3Cl:Eu phosphors exhibited that Eu3+ could be reduced to Eu2+ in an air atmosphere, and the corresponding mechanism of abnormal reduction of Eu3+ to Eu2+ had been discussed. Meanwhile, the enhancement in the PL intensity of red emission and the thermal stability of phosphors was observed upon co-doping via the charge balance strategies of (a) 2Sr2+ = Eu3+ + R+ (R = Li, Na and K), (b) Eu3+ + Si4+ = Sr2+ + P5+ and (c) 3Sr2+ = vacancy + 2Eu3+, among which Na+ ions had the optimized charge compensation effect. The mechanisms between different charge compensation methods and the improvement in PL intensities of Eu3+ were also analyzed.

KW - Abnormal reduction

KW - Charge compensation

KW - Phosphor

KW - Sr(PO)Cl:Eu

KW - Thermal stability

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