中国物理B ›› 2009, Vol. 18 ›› Issue (10): 4532-4535.doi: 10.1088/1674-1056/18/10/072

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A novel Dy3+-doped GdPO4 white-light phosphors under vacuum ultraviolet excitation for Hg-free lamps application

韩国才1, 张加驰1, 王育华2, 吴春芳2   

  1. (1)Department of Material Science, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China; (2)Department of Material Science, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China;Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China
  • 收稿日期:2009-02-20 修回日期:2009-03-17 出版日期:2009-10-20 发布日期:2009-10-20
  • 基金资助:
    Project supported by the Combination of Industry and Research by the Ministry of Education and Guangdong Province (Grant No 0712226100023).

A novel Dy3+-doped GdPO4 white-light phosphors under vacuum ultraviolet excitation for Hg-free lamps application

Han Guo-Cai(韩国才)a), Wang Yu-Hua(王育华)a)b)†, Wu Chun-Fang(吴春芳)a)b), and Zhang Jia-Chi(张加驰)a)   

  1. a Department of Material Science, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China; b Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China
  • Received:2009-02-20 Revised:2009-03-17 Online:2009-10-20 Published:2009-10-20
  • Supported by:
    Project supported by the Combination of Industry and Research by the Ministry of Education and Guangdong Province (Grant No 0712226100023).

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摘要： Novel Dy3+-doped GdPO4 white light phosphors with monoclinic system were successfully synthesised by hydrothermal method at 240~\du. This paper investigates the luminescence properties of white-light Gd1-xPO4,:xDy3+ under vacuum ultraviolet (VUV) excitation. The strong absorption at around 147~nm in excitation spectrum energy can be transferred to the energy levels of Dy3+ ion from the host absorption. Additionally, this white light phosphors are activated by a single Dy3+ion and with a lower preparation temperature, which tend to decrease the consumption of rare earth resource and energy. Therefore, the luminescence of Gd1-xPO4:xDy3+ under VUV excitation is effective, and proves to be promising in application to mercury-free lamp.

Abstract: Novel Dy3+-doped GdPO4 white light phosphors with monoclinic system were successfully synthesised by hydrothermal method at 240 ℃. This paper investigates the luminescence properties of white-light Gd1-xPO4,:xDy3+ under vacuum ultraviolet (VUV) excitation. The strong absorption at around 147 nm in excitation spectrum energy can be transferred to the energy levels of Dy3+ ion from the host absorption. Additionally, this white light phosphors are activated by a single Dy3+ion and with a lower preparation temperature, which tend to decrease the consumption of rare earth resource and energy. Therefore, the luminescence of Gd1-xPO4:xDy3+ under VUV excitation is effective, and proves to be promising in application to mercury-free lamp.

Key words: vacuum ultraviolet, hydrothermal synthesis, phosphors

中图分类号:  (Methods of materials synthesis and materials processing)

  • 81.20.-n
78.55.Hx (Other solid inorganic materials) 81.10.Dn (Growth from solutions)