A novel Dy3+-doped GdPO4 white-light phosphors under vacuum ultraviolet excitation for Hg-free lamps application |
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Authors: | Han Guo-Cai Wang Yu-Hu Wu Chun-Fang and Zhang Jia-Chi |
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Affiliation: | Department of Material Science, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China; 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 |
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Abstract: | 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. |
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Keywords: | vacuum ultraviolet hydrothermal
synthesis phosphors |
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