Phosphor, light-emitting device, and plasma display panel

Details Phosphor, light-emitting device, and plasma display panel Phosphor, light-emitting device, and plasma display panel

2011-03-08

2011-03-08

Macchiarolo, Peter J (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

Three or more electrode discharge device

C252S30140F, C313S486000

Reexamination Certificate

active

07902756

ABSTRACT:
The present invention is a blue phosphor that is represented by a general formula xSrO.yEuO.MgO.zSiO2, where 2.970≦x≦3.500, 0.006≦y≦0.030, and 1.900≦z≦2.100. This blue phosphor has a crystal structure that is essentially a merwinite structure, and the crystal structure has a unit cell volume of 714.8 Å3or less. Or, in this blue phosphor, a peak appearing around 2θ=22.86 degrees in an X-ray diffraction pattern obtained by measurement of the blue phosphor using an X-ray with a wavelength of 0.773 Å has a one-fifth value width of 0.17 degrees or less. Furthermore, the present invention is a light-emitting device having a phosphor layer including the phosphor. A suitable example of the light-emitting device is a plasma display panel.

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Japanese Office Action, dated Mar. 27, 2008, along with the English translation.
Ha-Kyun Jung et al., “Luminescent properties of Eu2+-activated (Ba, Sr)3MgSi2O8phosphor under VUV irradiation”, Optical Materials, vol. 28, 2006, pp. 602-605.
Japanese Office Action dated Mar. 27, 2008.

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