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Chin. Phys. B, 2009, Vol. 18(10): 4532-4535    DOI: 10.1088/1674-1056/18/10/072
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

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)
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
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.
Keywords:  vacuum ultraviolet      hydrothermal synthesis      phosphors  
Received:  20 February 2009      Revised:  17 March 2009      Accepted manuscript online: 
PACS:  81.20.-n (Methods of materials synthesis and materials processing)  
  78.55.Hx (Other solid inorganic materials)  
  81.10.Dn (Growth from solutions)  
Fund: Project supported by the Combination of Industry and Research by the Ministry of Education and Guangdong Province (Grant No 0712226100023).

Cite this article: 

Han Guo-Cai(韩国才), Wang Yu-Hua(王育华), Wu Chun-Fang(吴春芳), and Zhang Jia-Chi(张加驰) A novel Dy3+-doped GdPO4 white-light phosphors under vacuum ultraviolet excitation for Hg-free lamps application 2009 Chin. Phys. B 18 4532

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