Photoluminescence properties of Er3 -doped Ba0_5Sr0_5TiO3 prepared by sol–gel synthesis.pdf

Materials Science and Engineering B 111 (2004) 31–35 Photoluminescence properties of Er3+-doped Ba0.5 Sr0.5TiO3 prepared by sol–gel synthesis Cai Shen, Qian Liu∗, Qing-Feng Liu State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, PR China Received 25 December 2003; accepted 4 March 2004 Abstract Er3+ -doped Ba0.5 Sr0.5TiO3 (BST) powders were prepared by using barium nitrate, strontium nitrate, tetrabutyl titanate, and ammonia via citrate–nitrate combustion process, along with the XRD, DSC/TGA, and SEM analytic reports. The Er3+ luminescence intensity reached a maximum value in the sample with 3 mol% Er3+ ions concentration sintered at temperature 1300 ◦C. We also showed that 1 mol% Er dopant improved the dielectric property of BST and the BST:Er materials may have potential use for electroluminescence devices. © 2004 Elsevier B.V. All rights reserved. Keywords: (Ba, Sr)TiO3 ; Er-doping, Sol–gel preparation; Photoluminescence; Dielectric property 1. Introduction usefulness of these devices. While doping with MgO has reduced the photorefractive problem for other applications, Recently, there has been considerable interest in the it appears that the rare-earth dopant may reduce the effec- fabrication of rare-earth-doped materials for optically ac- tiveness of the MgO [1–5]. tive waveguides. Rare-earth ions exhibit a characteristic Barium tit