Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/24368
Title: Photoluminescent and low-voltage cathodoluminescent blue-emitting phosphors with high colour purity
Authors: Li, HL
Chan, HLW 
Hao, JH 
Issue Date: 2009
Publisher: Institute of Physics Publishing
Source: Journal of physics. D, Applied physics, 2009, v. 42, no. 18, 185103 How to cite?
Journal: Journal of physics. D, Applied physics 
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 transition 1D2 → 3F 4. 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.
URI: http://hdl.handle.net/10397/24368
ISSN: 0022-3727
EISSN: 1361-6463
DOI: 10.1088/0022-3727/42/18/185103
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