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Upconversion fluorescence in Nd3+/Yb3+ co-doped titanate glasses prepared by containerless method

Published online by Cambridge University Press:  14 November 2011

Xiuhong Pan ,
Jianding Yu ,
Yan Liu  and
Minghui Zhang
Xiuhong Pan*
Affiliation:
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
Jianding Yu
Affiliation:
Japan Aerospace Exploration Agency, ISS Science Project Office, Tsukuba 305-8500, Japan
Yan Liu
Affiliation:
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
Minghui Zhang
Affiliation:
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
*
a)Address all correspondence to this author. e-mail: xhpan@mail.sic.ac.cn
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Abstract

Nd3+/Yb3+ co-doped TiO2–La2O3 glasses modified by ZrO2 were fabricated by containerless method. Under the excitation of 980 nm lasers, three intense emissions centered at 521, 545, and 655 nm were observed, which are assigned to the Nd3+: 4G9/2→4I9/2, 4G7/2→4I9/2, and 4G7/2→4I13/2 transitions, respectively. Besides, two very weak emission bands at 496 and 603 nm were also found due to the Nd3+ transition of 2G9/2→4I9/2 and 4G5/2 (or 2G7/2)→4I9/2, respectively. Pumping powder dependence of emission intensity suggests a two-photon adsorption process responsible for the upconversion luminescence. A combined phonon-assisted and cooperative sensitization mechanism is presented to interpret the energy transfer from Yb3+ to Nd3+ ions. In addition, the highest intensity of luminescence was found for the glass with 1.2 mol% Nd3+, and the upconversion efficiency can be enhanced by increasing of ZrO2 content.

Keywords

LuminescenceNdOxide
Type
Articles
Information
Journal of Materials Research , Volume 26 , Issue 23 , 14 December 2011 , pp. 2907 - 2911
Copyright
Copyright © Materials Research Society 2011

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