Concentration effects in the photoluminescence spectra of ZnAl2(1-x)Cr2xS4

被引：6

作者：

Klokishner, S. I. ^{[1
]}

Kulikova, O. V. ^{[1
]}

Kulyuk, L. L. ^{[1
]}

Nateprov, A. A. ^{[1
]}

Nateprov, A. N. ^{[1
]}

Ostrovsky, S. M. ^{[1
]}

Palii, A. V. ^{[1
]}

Reu, O. S. ^{[1
]}

Siminel, A. V. ^{[1
]}

机构：

[1] Moldavian Acad Sci, Inst Appl Sci, MD-2028 Kishinev, Moldova

来源：

OPTICAL MATERIALS | 2008年 / 31卷 / 02期

关键词：

Luminescence; Chromium ions; Spinet structure; Clusters; Configuration diagram;

D O I：

10.1016/j.optmat.2008.04.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The luminescence properties of the ZnAl2(1-x)Cr2xS4 single crystals with different chromium content are investigated. The emission spectra of the samples with a small amount of chromium (x <= 0.005) consist of the R-line (E-R = 1.61 eV) and its phonon side band. At increasing of chromium concentration two new U-bands centered at E-u(a) = 1.45 eV and E-U(b) = 1.3 eV appear in the emission spectra. It is assumed, that the increase of the new broad bands intensity with increasing of chromium concentration takes place due to the formation of nonequivalent Cr3+-ions occupying octahedral sites, in the first cationic coordination sphere of which one or two aluminum ions are replaced by chromium ions. (C) 2008 Published by Elsevier B.V.

引用

页码：284 / 290

页数：7

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