期刊
OPTICAL MATERIALS
卷 36, 期 10, 页码 1709-1714出版社
ELSEVIER
DOI: 10.1016/j.optmat.2014.02.001
关键词
Niobate; Perovskite; Crystal structure; Luminescence
资金
- SUPERLUMI station at HASYLAB (DESY) in Hamburg [I-20110592]
- State Fund for Fundamental Researches of Ukraine [F54.1/040]
The A(3)(II)LaNb(3)O(12) (A(II) = Ba, Sr) layered perovskites were synthesized by co-precipitation method. Luminescence properties of these compositions have been investigated for the first time. Emission spectra consist of wide bands with maxima located near 430 and 500 nm. Luminescence processes are discussed in connection with features of cation compositions, crystal structure and distortions of the NbO67- groups' symmetry. Possible scheme of electron states and the lowest allowed electron transitions has been built for the niobate groups of O-h and C-3V symmetry. In this scheme, the 430 and 500 nm emission bands were assigned to T-1 -> A(1) and E -> A(1) electron transitions in the perfect and distorted NbO67- oxyanions, respectively. (C) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据