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Light emitting material for emitting light blue, green, yellow and white light for series field emission displays and preparation method thereof

A luminescent material, a technology for emitting white light, used in luminescent materials, chemical instruments and methods, the use of gas discharge lamps, etc. Simple, easy-to-use effects

Inactive Publication Date: 2013-06-19
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oxide Trichromatic Phosphor Powder Y 2 o 3 :Eu 3+ (red), ZnO:Zn (green), Y 2 SiO 5 : Ce 3+ (Blue) etc. have good stability, but generally have the problems of low-voltage electron beam excitation, low luminous efficiency and poor conductivity.

Method used

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  • Light emitting material for emitting light blue, green, yellow and white light for series field emission displays and preparation method thereof
  • Light emitting material for emitting light blue, green, yellow and white light for series field emission displays and preparation method thereof
  • Light emitting material for emitting light blue, green, yellow and white light for series field emission displays and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh europium oxide (Eu 2 o 3 )0.0018g, anhydrous lithium carbonate (Li 2 CO 3 ) 0.7389g, calcium carbonate (CaCO 3 ) 0.9999g, silicon dioxide (SiO 2 ) 0.6008g, fully ground in an agate mortar and mixed uniformly, roasted in a reducing atmosphere of a mixed gas of hydrogen and nitrogen (the volume ratio of hydrogen and nitrogen is 1:3), and sintered at 800°C for 6 hours. Cool naturally to room temperature. The sample is taken out and ground to finally obtain the product.

Embodiment 2

[0025] Weigh europium oxide (Eu 2 o 3 ) 0.0053g, anhydrous lithium carbonate (Li 2 CO 3 ) 0.7389g, calcium carbonate (CaCO 3 ) 0.9979g, silicon dioxide (SiO 2 ) 0.6008g, fully ground in an agate mortar and mixed uniformly, roasted in a reducing atmosphere of a mixed gas of hydrogen and nitrogen (the volume ratio of hydrogen and nitrogen is 1:3), and sintered at 800°C for 6 hours. Cool naturally to room temperature. The sample is taken out and ground to finally obtain the product.

Embodiment 3

[0027] Weigh europium oxide (Eu 2 o 3 )0.0088g, anhydrous lithium carbonate (Li2 CO 3 ) 0.7389g, calcium carbonate (CaCO 3 ) 0.9959g, silicon dioxide (SiO 2 ) 0.6008g, fully ground in an agate mortar and mixed uniformly, roasted in a reducing atmosphere of a mixed gas of hydrogen and nitrogen (the volume ratio of hydrogen and nitrogen is 1:3), and sintered at 800°C for 6 hours. Cool naturally to room temperature. The sample is taken out and ground to finally obtain the product.

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Abstract

The invention discloses a light emitting material for emitting light blue, green, yellow and white light for series field emission displays (FED). The chemical composition expression of the material is Li2M1-xEuxSO4 and Li2-yM1-xEuxCeySO4, wherein M is an alkaline earth metal ion selected from Ca<2+>, Ba<2+> and Sr<2+>; Eu<2+> (bivalent rare earth europium ion) and Ce<3+> (trivalent rare earth cerium ion) are active ions; and x and y are molar percentage coefficients of the active ions Eu<2+> and Ce<3+> relative to the alkaline earth metal ion M and range from 0.001 to 0.01. The preparation method of the invention is simple; the novel rare earth light emitting material prepared by the method can emit strong light blue, green and yellow light and white light formed by Eu<2+> emission and Ce<3+> emission under the excitation of a low voltage electron beam; and the display range of fluorescent powder can be obviously expanded by introducing the material into the tricolor fluorescent powder for FED.

Description

technical field [0001] The invention relates to a series of cyan, green, yellow and white emitting fluorescent powder for Field Emission Display (FED) and a preparation method thereof. Background technique [0002] Field Emission Display (FED) technology is a flat-panel display technology developed in recent years. Its working principle is similar to that of traditional cathode ray tube (CRT) display. It is imaged by electron beam bombardment of phosphor powder coated on the display screen. However, unlike the electron beam emitted by the CRT cathode that must be scanned and imaged on the fluorescent screen through the deflection coil, the FED does not require a deflection coil, but is directly bombarded by electron beams emitted by a large number of micro cathodes on the field emission cathode array (FEAs). powder imaging. In addition, the anode voltage of the FED is lower compared to the high-voltage thermal electron beam emission of the CRT. The advantages of no need fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/59
CPCY02B20/181Y02B20/00
Inventor 梁宏斌谢木标苏锵
Owner SUN YAT SEN UNIV