Journal
OPTICAL MATERIALS
Volume 35, Issue 9, Pages 1748-1751Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2013.05.031
Keywords
Photoluminescence; MgY4Si3O13; Green phosphor; Vacuum ultraviolet
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Funding
- 111 Talents Project Foundation of Inner Mongolia
- Innovation Fund of the Inner Mongolia University of Science and Technology [2010NC026]
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Gd3+ and Tb3+ co-doped MgY4Si3O13 green phosphors were prepared by a solid-state reaction. The photoluminescence properties in vacuum ultraviolet-visible (VUV-vis) range and decay properties were investigated in details. The f-d transition of Gd3+ ions and spin-allowed f-d transition of Tb3+ ions locate at about 134 nm and 239 nm, respectively. Two charge transfer bands of O2- -> Gd3+ and O2- -> Tb3+ overlap at about 155 nm. Some f-f transition of TIP and Gd3+ ions are confirmed in VUV-vis range. Upon excitation at 172 nm, the optimal composition of MgY3.3Si3O13:0.5Ge(3+), 0.2Tb(3+) phosphor exhibits the characteristic transitions of Gd3+ and Tb3+ with chromaticity coordinate of (0.2849, 0.5843). The phosphor has a shorter decay time (2.13 ms) than that of Zn2SiO4:Mn2+ (4.56 ms). The results suggest that this green phosphor is a potential candidate for mercury-free luminescence lamps and plasma display panels (PDPs) application. (C) 2013 Elsevier B.V. All rights reserved.
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