کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7991124 | 1516132 | 2018 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Eu3+:KY(MoO4)2: A novel anisotropic red-emitting material with a layered structure
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We report on the crystal growth, structure determination and the vibronic and spectroscopic properties of a novel red-emitting anisotropic crystal featured by a layered structure, the Eu3+-doped orthorhombic potassium yttrium double molybdate crystal, KY(MoO4)2. The transition probabilities of Eu3+ ions are determined within the Judd-Ofelt theory. The stimulated-emission cross-sections are calculated for the 5D0 â 7FJ transitions of Eu3+ with polarized light. The maximum ÏSE reaches 11.4â¯Ãâ¯10â20â¯cm2â¯at 613.9â¯nm for E || c. The strong anisotropy of the spectroscopic properties of Eu3+ is attributed to the layered structure of KY(MoO4)2. The lifetime of the 5D0 state is 0.65â¯ms. Under UV excitation, Eu:KY(MoO4)2 provides red emission (CIE 1931 coordinates, xâ¯=â¯0.665 and yâ¯=â¯0.335) with almost unity color purity. Eu3+ ions are studied as structural probes, revealing a single type of site (C2 symmetry). The polarization-anisotropy of the purely magnetic-dipole 5D0 â 7F1 transition is discussed. Eu:KY(MoO4)2 is promising for red phosphors and deep-red lasers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 762, 25 September 2018, Pages 786-796
Journal: Journal of Alloys and Compounds - Volume 762, 25 September 2018, Pages 786-796
نویسندگان
Anna Volokitina, Pavel Loiko, Elena Vilejshikova, Xavier Mateos, Elena Dunina, Alexey Kornienko, Nikolai Kuleshov, Anatoly Pavlyuk,