Photoluminescent and low-voltage cathodoluminescent blue-emitting phosphors with high colour purity

H. L. Li, H. L.W. Chan, Jianhua Hao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

9 Citations (Scopus)

Abstract

Tungstate phosphor synthesized by a polyol method exhibits characteristic emission of Tm3+in the blue region when excited either by ultraviolet light or by a low-voltage electron beam. The emission at 453 nm predominates in both spectra, which is attributed to the exceptionally large probability of transition1D2→3F4. In the photoluminescence and cathodoluminescence spectra, this blue-emitting phosphor has chromaticity coordinates (0.1556, 0.0316) with a dominant wavelength of 455 nm and (0.1498, 0.0383) with a dominant wavelength of 460 nm, respectively. The colour purities are both as high as 97%. These values are superior to those reported for the blue-emitting phosphors. The changes in luminescent intensity of visible and near-infrared emission with annealing temperatures under low-voltage electron beam excitation were discussed.
Original languageEnglish
Article number185103
JournalJournal of Physics D: Applied Physics
Volume42
Issue number18
DOIs
Publication statusPublished - 18 Sep 2009

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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