中国物理B ›› 2011, Vol. 20 ›› Issue (3): 37804-037804.doi: 10.1088/1674-1056/20/3/037804

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Influence of Si4+ substitution on the temperature-dependent characteristics of Y3Al5O12:Ce

徐生艳, 张晓松, 周永亮, 奚群, 李岚   

  1. Insititute of Material Physics, Tianjin University of Technology, Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, The Tianjin Key Laboratory for Optoelectronic Materials and Devices, Tianjin 300384, China
  • 收稿日期:2010-06-22 修回日期:2010-07-22 出版日期:2011-03-15 发布日期:2011-03-15
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 6139702), the National Natural Science Foundation of China (Grant Nos. 60877029, 60977035 and 60907021), the Natural Science Foundation of the Tianjin Education Committee, China

Influence of Si4+ substitution on the temperature-dependent characteristics of Y3Al5O12:Ce

Xu Sheng-Yan(徐生艳), Zhang Xiao-Song(张晓松), Zhou Yong-Liang(周永亮), Xi Qun(奚群), and Li Lan(李岚)†   

  1. Insititute of Material Physics, Tianjin University of Technology, Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, The Tianjin Key Laboratory for Optoelectronic Materials and Devices, Tianjin 300384, China
  • Received:2010-06-22 Revised:2010-07-22 Online:2011-03-15 Published:2011-03-15
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 6139702), the National Natural Science Foundation of China (Grant Nos. 60877029, 60977035 and 60907021), the Natural Science Foundation of the Tianjin Education Committee, China(Grant No. 20071207), and the Natural Science Foundation of Tianjin, China (Grant Nos. 09JCYBJC01400 and 07JCYBJC06400).

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摘要： A series of Y3Al5O12:Ce (YAG:Ce) phosphors doped with different Si4+ concentrations is prepared by solid-state reaction. The temperature dependent characteristics of luminescent spectrum and decay time of Ce3+ are investigated. With Si4+ doped, the emission spectrum shows a blue shift due to a decrease of the splitting of 5d levels of Ce3+ ion. The thermal stability is greatly improved by adding Si4+ because the activation energy ΔE increases from 0.1836 eV to 0.2401 eV. The study of the decay times against temperature for various doping concentrations of Si4+ shows that the calculated nonradiative decay rate is affected by Si4+ substitution. The results are explained by the configurational coordinate diagram.

Abstract: A series of Y3Al5O12:Ce (YAG:Ce) phosphors doped with different Si4+ concentrations is prepared by solid-state reaction. The temperature dependent characteristics of luminescent spectrum and decay time of Ce3+ are investigated. With Si4+ doped, the emission spectrum shows a blue shift due to a decrease of the splitting of 5d levels of Ce3+ ion. The thermal stability is greatly improved by adding Si4+ because the activation energy ΔE increases from 0.1836 eV to 0.2401 eV. The study of the decay times against temperature for various doping concentrations of Si4+ shows that the calculated nonradiative decay rate is affected by Si4+ substitution. The results are explained by the configurational coordinate diagram.

Key words: phosphor, luminescence, temperature dependence, decay time

中图分类号:  (Photoluminescence, properties and materials)

  • 78.55.-m
71.70.-d (Level splitting and interactions) 71.70.Ch (Crystal and ligand fields)