Photoluminescence of GdVO₄:Eu³⁺, Al ³⁺ Phosphors under VUV Excitation

Abstract:

The microstructure and photoluminescence properties of Gd0_.94-xAl_xEu_0.06VO₄ (0≤x≤0.04) phosphors with various Al³⁺ contents were investigated. The phosphors showed a nanocrystalline nature and a high-quality powder characteristic. The crystallite sizes of the phosphors were calculated to be 46-48 nm. The annealed Gd_0.94-xAl_xEu_0.06VO₄ phosphors crystallized in the tetragonal structure. In the emission spectra, several emission peaks were observed over the measured wavelength range (500-750 nm), which were caused by the difference in the transitions of Eu3+ ions, depending on the local symmetry (⁵D0 → ⁷Fj, j = 1, 2, 3, and 4). The strongest emission peak was located at 619 nm, providing a high-purity red emission. The doped Al3+ yielded significantly enhanced the emission intensity. The most intense high-purity red emission was obtained for Gd_0.93Al_0.01Eu_0.06VO₄.

• Periodical: Journal of Nano Research (Volumes 18-19)
• Pages: 257-263
• DOI: https://doi.org/10.4028/www.scientific.net/JNanoR.18-19.257
• Online since: July 2012
• Authors: K. Park, M.H. Heo, Y. Kim, J.Y. Kim
• Keywords: Gd_0.94-XAl_xEu_0.06VO₄, Phosphor, Photoluminescence (PL), Ultrasonic Spray Pyrolysis

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