Influence of yttrium ions on the emission transfer features of Ce3+/Yb3+ co-doped lithium silicate glasses

被引：42

作者：

Babu, N. Ch. Ramesh ^{[1
]}

Rao, Ch. Srinivasa ^{[2
]}

Raju, G. Naga ^{[1
]}

Kumar, V. Ravi ^{[1
]}

Kityk, I. V. ^{[3
]}

Veeraiah, N. ^{[1
]}

机构：

[1] Acharya Nagarjuna Univ, Dept Phys, Nuzvid 521201, AP, India

[2] Andhra Loyola Coll, Dept Phys, Vijayawada 520008, AP, India

[3] Czestochowa Tech Univ, Dept Elect Engn, PL-42201 Czestochowa, Poland

来源：

OPTICAL MATERIALS | 2012年 / 34卷 / 08期

关键词：

Li2O-Y2O3-SiO2 glass system; Ce3+ and Yb3+ ions; Photoluminescence spectra; Energy transfer; OPTICAL-PROPERTIES; SPECTROSCOPIC PROPERTIES; LASER; YB3+; ABSORPTION; CERIUM; Y2O3; LUMINESCENCE; PHOSPHATE; SPECTRA;

D O I：

10.1016/j.optmat.2012.02.024

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Optical absorption absorption and photoluminescence spectra (PL) of the glasses possessing compositions (49 - x) Li2O-x Y2O3-50 SiO2:1.0 Ce2O3/1.0Yb(2)O(3) and (49 - x) Li2O-x Y2O3-50 SiO2:(0.5 Ce2O3 + 0.5 Yb2O3) with x varying from 5 to 15 mol% were studied. The PL spectra of Ce3+ doped glasses excited at 360 nm exhibited two broad parity allowed 5d(D-2) -> 4f(F-2(5/2),(7/2)) bands in the blue spectral region, whereas the spectra of Yb3+ doped glasses excited at 900 nm exhibited a broad emission band centered at about 980 nm due to F-2(5/2) -> F-2(7/2) transition. A significant enhancement in the intensity of NIR emission is observed due to the sensitization with Ce3+ ions. The increase in the rate of energy transfer from Ce3+ to Yb3+ could be observed with increasing Y2O3 content. The reasons for such improvement have been discussed within a framework of structural modifications taking place in the vicinity of Yb3+ ions. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：1381 / 1388

页数：8

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