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 language | English |
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Article number | 185103 |
Journal | Journal of Physics D: Applied Physics |
Volume | 42 |
Issue number | 18 |
DOIs | |
Publication status | Published - 18 Sept 2009 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Acoustics and Ultrasonics
- Surfaces, Coatings and Films