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.
Received: 20 February 2009
Revised: 17 March 2009
Accepted manuscript online:
PACS:
81.20.-n
(Methods of materials synthesis and materials processing)
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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