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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 29, Number 4
BKCSDE 29(4)
April 20, 2008

Title	Cathodoluminescence and Longevity Properties of Potential Sr_1-xM_xGa₂S₄:Eu (M = Ba or Ca) Green Phosphors for Field Emission Displays
Author	Ki-Young Ko, Young-Duk Huh, Young Rag Do*
Keywords	Sr_1-xM_xGa₂S₄:Eu (M = Ba or Ca), Cathodoluminescence, FED
Abstract	We report the cathodoluminescence and aging properties of a series of green phosphors of formula Sr_1-xM_xGa₂S₄:Eu (x = 0.0-1.0, M = Ba or Ca) that have potential applications in field emission displays (FEDs). The series of phosphors was synthesized via NaBr-aided solid-state reactions in a flowing H₂S stream. A low level (~20%) of Ba or Ca substitution for Sr in SrGa₂S₄:Eu maintains the orthorhombic phase of pure SrGa2S4:Eu phosphors. Further, a low level (~20%) of Ba or Ca substitution for Sr in SrGa2S4:Eu provides various green colors and sufficient brightness for FED applications. Substitution of Ba or Ca for Sr in SrGa₂S₄:Eu also improved the stability of the phosphor when it was operated under electron-beam irradiation of 5 kV.
Page	822 - 826
Full Text	PDF

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