Investigation of luminescence and optical absorption of K2LiAlF6:Cr3+ single crystals

被引：28

作者：

da Silva, M. A. F. M.

Barthem, R. B.

Sosman, L. P. ^{[1
]}

机构：

[1] Univ Estado Rio De Janeiro, Inst Fis, BR-20559900 Rio De Janeiro, Brazil

[2] Fed Univ Rio De Janeiro, Inst Fis, BR-21945970 Rio De Janeiro, Brazil

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2006年 / 179卷 / 12期

关键词：

photoluminescence; fluoride; chromium;

D O I：

10.1016/j.jssc.2006.08.003

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Photoluminescence, absorption and excitation spectra of K(2)LiAIF(6) single crystals doped with 1% of Cr3+ are presented. The nearinfrared photoluminescence observed at room temperature, 77 and 4 K are attributed to the zero-phonon spin-allowed T-4(2)(F-2) -> (4)A(2)(F-4) transition of Cr3+ octahedrally coordinated by F- ions. Lifetimes are obtained. The 4 K emission broad band was described in terms of normal modes of the octahedral complex [CrF6](3-). The Racah, crystal-field and Huang-Rhys parameters are calculated and the quantum efficiency and thermal quenching estimated and compared with Cr3+ properties in different environments. (c) 2006 Elsevier Inc. All rights reserved.

引用

页码：3718 / 3723

页数：6

共 30 条

[1] Investigation of Cr3+ ions in Cs2NaGaF6 single crystals by optical spectroscopy [J].