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Luminescence Properties of Ca(Y0.915−x Gd x Al0.025Eu0.06)BO4 Phosphors Under VUV Irradiation

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The major phase of post-treated Ca(Y0.915−x Gd x Al0.025Eu0.06)BO4 (0 ≤ x ≤ 0.3) phosphors was solid solutions of the constituent oxides, which had an orthorhombic warwickite-like structure. The calculated crystallite size of the Ca(Y0.915−x Gd x Al0.025Eu0.06)BO4 phosphors was ∼36 nm. The Gd additive significantly enhanced both the charge transfer (CT) transition of O2−-Eu3+ and the absorption of the host materials, thereby resulting in an increase in emission intensity. The Ca(Y0.715Gd0.2Al0.025Eu0.06)BO4 phosphor showed the highest emission intensity at 593 nm, which was over five times as strong as that of a Gd-free Ca(Y0.915Al0.025Eu0.06)BO4 phosphor. The addition of Gd was desirable for improving the photoluminescent properties of red-emitting Ca(Y0.915Al0.025Eu0.06)BO4 phosphors.
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Document Type: Research Article

Publication date: 01 October 2008

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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