Photoluminescent and thermal stable properties of Tb3+ -doped Ca-α-SiAlON under VUV excitation

T. S. Chan, C. C. Lin, R. S. Liu, R. J. Xie, N. Hirosaki, B. M. Cheng

Research output: Contribution to journalArticle

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Abstract

This work described the photoluminescent (PL) and thermal stability properties of Tb3+ -doped Ca-α-SiAlON phosphors, with the composition (Ca1-3/2x Tbx) m/2 Si12-m-n Alm+n On N16-n (m=1.5, n=0.75) that can be excitable under vacuum UV (VUV) light. The concentration of Tb as a fraction of that of Ca was varied from 0.03x1.0. The sample with x=0.25 had the highest emission intensity. The obtained activation energy for the sample with x=0.25 was 0.1 eV. The major mechanism of concentration quenching was dipole-dipole interaction. The VUV PL intensities of composition-optimized x=0.25 samples under different excitation wavelengths were compared. The results indicated that the PL intensity at λex =172 or λex =147 nm was much weaker than the obtained intensity with excitation at 258 nm, suggesting that Tb3+ -doped Ca-α-SiAlON phosphors can be excitable by VUV but are not suitable for applications in plasma display panels. Moreover, the emission peak intensity (excitation at 258 nm and monitored at 544 nm) decreased with increasing temperature and have a slight blueshift. This phenomenon is explained by the anti-Stokes effect associated with the interaction between electron and thermal phonon.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume156
Issue number7
DOIs
Publication statusPublished - Jun 1 2009
Externally publishedYes

Fingerprint

Vacuum
Phosphors
vacuum
excitation
phosphors
Chemical analysis
Ultraviolet radiation
Quenching
dipoles
Thermodynamic stability
Activation energy
Display devices
Plasmas
Wavelength
Electrons
thermal stability
quenching
Hot Temperature
interactions
activation energy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Electrochemistry

Cite this

Photoluminescent and thermal stable properties of Tb3+ -doped Ca-α-SiAlON under VUV excitation. / Chan, T. S.; Lin, C. C.; Liu, R. S.; Xie, R. J.; Hirosaki, N.; Cheng, B. M.

In: Journal of the Electrochemical Society, Vol. 156, No. 7, 01.06.2009.

Research output: Contribution to journalArticle

Chan, T. S. ; Lin, C. C. ; Liu, R. S. ; Xie, R. J. ; Hirosaki, N. ; Cheng, B. M. / Photoluminescent and thermal stable properties of Tb3+ -doped Ca-α-SiAlON under VUV excitation. In: Journal of the Electrochemical Society. 2009 ; Vol. 156, No. 7.
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