Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7991124 | Journal of Alloys and Compounds | 2018 | 11 Pages |
Abstract
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.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Anna Volokitina, Pavel Loiko, Elena Vilejshikova, Xavier Mateos, Elena Dunina, Alexey Kornienko, Nikolai Kuleshov, Anatoly Pavlyuk,