Photoluminescence, optical absorption and XRD studies on X-ray irradiated terbium doped KBr crystals

被引：7

作者：

Bangaru, S. ^{[1
]}

Muralidharan, G. ^{[2
]}

机构：

[1] Arignar Anna Govt Arts Coll, Dept Phys, Namakkal 637001, India

[2] Gandhigram Rural Univ, Dept Phys, Gandhigram 624302, India

来源：

JOURNAL OF LUMINESCENCE | 2010年 / 130卷 / 03期

关键词：

Photoluminescence; XRD; Optical absorption; THERMO-LUMINESCENCE; ALKALI-HALIDES; THERMOLUMINESCENCE; CE3+; CHLORIDE; TB3+;

D O I：

10.1016/j.jlumin.2009.09.015

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This paper reports the optical absorption, photoluminescence (PL), XRD, SEM studies made on KBr:Tb3+ crystals. The integrated light intensity is enhanced by about two orders Of Magnitude as compared to the undoped samples in spite of some OH- present in the samples. PL of these crystals exhibits characteristic Tb3+ emissions due to transitions from the D-5(3) to D-5(4) levels to various levels of the F-7 septet on F-bleaching X-ray irradiated crystals Z(3) centers are observed. The bands observed in the emission spectra of Tb3+ doped KBr are found to be shifted to higher wavelength. The stokes-shift of KBr:Tb3+ is determined and it is found to have a large value. The XRD studies have been made to determine the crystalline structure of KBr and KBr:Tb3+ and also the Miller indices. The SEM studies made reveal the presence of microcrystalline structure. (C) 2009 Published by Elsevier B.V.

引用

页码：343 / 346

页数：4

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