Time-resolved cathodoluminescence spectroscopy of YAG and YAG:Ce3+ phosphors

E. Polisadova, D. Valiev, V. Vaganov, V. Oleshko, Tao Han, C. Zhang, A. Burachenko, A. I. Popov

Research output: Contribution to journalArticle

Abstract

The phosphor powders, both undoped and Ce3+ doped with different concentration Y3Al5O12 (YAG), were synthesized by the solid-state reaction method with addition of BaF2 flux. SEM and XRD characterization of the samples were performed. The spectral and luminescence decay kinetic characteristics under the electron beam irradiation with nano- and picoseconds pulse duration and the electron energies of 250 keV and 55 keV were studied, respectively. Two bands in the cathodoluminescence spectrum of YAG:Ce3+ phosphors were observed with maxima at 2.19 ± 0.05 and 2.4 eV. The intensity ratio of these two bands depends on the electron energy and the duration of the excitation pulse. Instead, only one band at 2.12 ± 0.05 eV in the luminescence spectrum of undoped YAG phosphor. It is shown that cerium ions doping increases in the number of various hole centers.

Original languageEnglish
Article number109289
JournalOptical Materials
Volume96
DOIs
Publication statusPublished - 1 Oct 2019

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Cathodoluminescence
cathodoluminescence
Phosphors
yttrium-aluminum garnet
phosphors
Spectroscopy
Luminescence
electron energy
luminescence
spectroscopy
Cerium
Electrons
picosecond pulses
cerium
Solid state reactions
Powders
Electron beams
pulse duration
Doping (additives)
Irradiation

Keywords

  • Cathodoluminescence
  • Decay kinetics
  • Radiation defects
  • Time-resolved spectroscopy
  • YAG:Ce phosphors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering

Cite this

Time-resolved cathodoluminescence spectroscopy of YAG and YAG:Ce3+ phosphors. / Polisadova, E.; Valiev, D.; Vaganov, V.; Oleshko, V.; Han, Tao; Zhang, C.; Burachenko, A.; Popov, A. I.

In: Optical Materials, Vol. 96, 109289, 01.10.2019.

Research output: Contribution to journalArticle

Polisadova, E. ; Valiev, D. ; Vaganov, V. ; Oleshko, V. ; Han, Tao ; Zhang, C. ; Burachenko, A. ; Popov, A. I. / Time-resolved cathodoluminescence spectroscopy of YAG and YAG:Ce3+ phosphors. In: Optical Materials. 2019 ; Vol. 96.
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AU - Polisadova, E.

AU - Valiev, D.

AU - Vaganov, V.

AU - Oleshko, V.

AU - Han, Tao

AU - Zhang, C.

AU - Burachenko, A.

AU - Popov, A. I.

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N2 - The phosphor powders, both undoped and Ce3+ doped with different concentration Y3Al5O12 (YAG), were synthesized by the solid-state reaction method with addition of BaF2 flux. SEM and XRD characterization of the samples were performed. The spectral and luminescence decay kinetic characteristics under the electron beam irradiation with nano- and picoseconds pulse duration and the electron energies of 250 keV and 55 keV were studied, respectively. Two bands in the cathodoluminescence spectrum of YAG:Ce3+ phosphors were observed with maxima at 2.19 ± 0.05 and 2.4 eV. The intensity ratio of these two bands depends on the electron energy and the duration of the excitation pulse. Instead, only one band at 2.12 ± 0.05 eV in the luminescence spectrum of undoped YAG phosphor. It is shown that cerium ions doping increases in the number of various hole centers.

AB - The phosphor powders, both undoped and Ce3+ doped with different concentration Y3Al5O12 (YAG), were synthesized by the solid-state reaction method with addition of BaF2 flux. SEM and XRD characterization of the samples were performed. The spectral and luminescence decay kinetic characteristics under the electron beam irradiation with nano- and picoseconds pulse duration and the electron energies of 250 keV and 55 keV were studied, respectively. Two bands in the cathodoluminescence spectrum of YAG:Ce3+ phosphors were observed with maxima at 2.19 ± 0.05 and 2.4 eV. The intensity ratio of these two bands depends on the electron energy and the duration of the excitation pulse. Instead, only one band at 2.12 ± 0.05 eV in the luminescence spectrum of undoped YAG phosphor. It is shown that cerium ions doping increases in the number of various hole centers.

KW - Cathodoluminescence

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