Color tuning by co-doping of Er doped TiO2 phosphors within a fixed Er concentration

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• 作者：B. S. Cao (12) bscao@dlnu.edu.cn
  Y. Y. He (2)
  Z. Q. Feng (2)
  H. Z. Zhang (2)
  Z. S. Wei (2)
  B. Dong (2)
• 关键词：Er doped TiO2 &#8211 ; Codoping &#8211 ; Color tuning &#8211 ; Upconversion
• 刊名：Journal of Sol-Gel Science and Technology
• 出版年：2012
• 出版时间：June 2012
• 年：2012
• 卷：62
• 期：3
• 页码：419-423
• 全文大小：410.4 KB
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• 作者单位：1. State Key Lab of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 China2. School of Physics and Materials Engineering, Dalian Nationalities University, Dalian, 116600 China
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Ceramics,Glass,Composites,Natural Materials
  Inorganic Chemistry
  Optical and Electronic Materials
  Nanotechnology
  
• 出版者：Springer Netherlands
• ISSN：1573-4846

文摘

In this paper, we report the color tuning of Er doped TiO₂ upconversion phosphors within a fixed Er concentration using 976 nm semiconductor laser diode excitation. By codoping with Mo, Yb or Li ions in the Er doped TiO₂, the green and red upconversion emissions from the 2H_11/2/4S_3/2 → 4I_15/2 and 4F_9/2 → 4I_15/2 transitions of Er ions were enhanced selectively and the color output of Er doped TiO₂ could be tuned by different intensity ratios of green to red emissions. The two-photon absorption processes were responsible for the green and red upconversion emissions of Er–Mo, Er–Yb and Er–Li codoped TiO₂ phosphors, and the corresponding enhanced mechanisms were discussed. It is expected that these color tuned phosphors within a fixed Er concentration have great potential for applications in biology, displays and other optical technology.