Fluorescent substance for vacuum ultraviolet-exited light emitting diode

A vacuum ultraviolet light and light-emitting device technology, which is applied in the field of fluorescent materials and can solve problems such as reduced brightness and insufficient brightness

Inactive Publication Date: 2008-06-18
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Such fluorescent materials comprising silicates still have the problem of insufficient brightness and reduction in brightness due to exposure to plasma
[0007] The object of the present invention is to provide a fluorescent material for vacuum ultraviolet radiation excitation light-emitting devices, which can emit light with relatively high brightness, and after exposure to plasma, the brightness has a small decrease

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh the raw material, i.e. calcium carbonate (CaCO produced by WAKOJUNYAKU Co., Ltd. 3 ), strontium carbonate (SrCO produced by WAKOJUNYAKU Co., Ltd. 3 ), europium oxide (Eu 2 o 3 ), basic magnesium carbonate (produced by WAKOJUNYAKU Co., Ltd. (MgCO 3 ) 4 Mg(OH) 2 ·5H 2 O) and silicon oxide (SiO produced by WAKO JUNYAKU Co., Ltd. 2 ), and mixed together so that CaCO 3 : SrCO 3 :Eu 2 o 3 :(MgCO 3 ) 4 Mg(OH) 2 ·5H 2 O: SiO 2 The molar ratio is 0.9215:0.0485:0.015:0.2:2. At 1200°C, with 2% (volume) H content 2 The resulting mixture was calcined for 2 hours under Ar flow, then ground, and then at 1200°C in a 2% (volume) content of H 2 Calcined for 2 hours under Ar flow. Thus, by the formula Ca 0.9215 Sr 0.485 Eu 0.03 MgSi 2 o 6 Indicates the composition of the fluorescent material. When this fluorescent material is under pressure of 6.7Pa (5×10 -2 Torr) or lower in a vacuum chamber, when irradiated with ultraviolet radiation using an exciter 146-n...

Embodiment 2

[0038] Weigh the raw material, i.e. strontium carbonate (SrCO produced by WAKOJUNYAKU Co., Ltd. 3 ), barium carbonate (BaCO produced by WAKOJUNYAKU Co., Ltd. 3 ), europium oxide (Eu 2 o 3 ), basic magnesium carbonate (produced by WAKOJUNYAKU Co., Ltd. (MgCO 3 ) 4 Mg(OH) 2 ·5H 2 O) and silicon oxide (SiO produced by WAKO JUNYAKU Co., Ltd. 2 ), and mixed together so that SrCO 3 : BaCO 3 :Eu 2 o 3 :(MgCO 3 ) 4 Mg(OH) 2 ·5H 2 O: SiO 2 The molar ratio is 2.28:0.57:0.075:0.2:2. At 1200°C, with 2% (volume) H content 2 The resulting mixture was calcined under an Ar atmosphere for 2 hours. Thus, by the formula Sr 2.28 Ba 0.57 Eu 0.15 MgSi 2 o 8 Indicates the composition of the fluorescent material. When this fluorescent material is under pressure of 6.7Pa (5×10-2 Torr) or lower in a vacuum chamber, when irradiated with ultraviolet radiation using an exciter 146-nm lamp (model: H0012 produced by USHIODENKI Co., Ltd.), it emits a luminance of 30cd / m 2 Blu-ray.

Embodiment 3

[0040] Weigh the raw material, i.e. barium carbonate (BaCO3 produced by KANTOKAGAKU Co., Ltd. 3 ), europium oxide (Eu 2 o 3 ), magnesium oxide (MgO produced by KANTOKAGAKU Co., Ltd.), and silicon oxide (SiO 2 ), and mixed together so that BaCO 3 :Eu 2 o 3 :MgO:SiO 2 The molar ratio is 1.98:0.01:1:2. Add 0.1 mole of B to 1 mole of product 2 o 3 As a flux, the resulting mixture was thoroughly wet mixed in acetone with a mortar and then dried. The mixed raw material thus obtained was placed in a stainless steel mold, and then pressurized at 40 MPa to form pellets with a size of 15 mm (diameter) x 3 mm (thickness). The obtained pellets were placed in an aluminum crucible, and heated at 1200 °C under H 2 , Ar composition ratio of 5%: 95% (volume) atmosphere for calcination for 3 hours. From this we get the formula Ba 1.98 Eu 0.02 MgSi 2 o 7 Indicates the composition of the fluorescent material. When this fluorescent material is under pressure of 6.7Pa (5×10 -2 Torr...

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Abstract

A fluorescent substance for vacuum ultraviolet radiation excited light-emitting devices which containing vacuum ultraviolet radiation excited light-emitting devices of fluorescent substance, including: a compound represented by the general formula: mM<1>O.nM<2>O.2M<3>O2, wherein M<1> is at least one metal selected from Ca, Sr and Ba, M<2> is at least one metal selected from Mg and Zn, M<3> is at least one metal selected from Si and Ge, and m and n satisfy 0.5 is either at least two metals selected from Ca, Sr and Ba or one of Sr and Ba; and at least one metal selected from Eu and Mn as an activator.

Description

[0001] This application is a divisional application of a Chinese patent application with an application date of September 27, 2001 and an application number of 01137167.6, and the title of the invention is "A Fluorescent Material for a Vacuum Ultraviolet Radiation Excitation Light-Emitting Device". technical field [0002] The present invention relates to fluorescent materials suitable for use in vacuum ultraviolet radiation excited light emitting devices such as plasma display panels (hereinafter referred to as "PDPs") and rare gas lamps. Background technique [0003] Fluorescent materials that emit light when excited with vacuum ultraviolet radiation etc. include, for example, BaMgAl 10 o 17 : Eu, which contains Ba, Mg, Al, O, and an activator (Eu) as a blue fluorescent material for a vacuum ultraviolet radiation-excited light-emitting device, and Zn 2 SiO 4 : Mn containing Zn, Si, O and an activator (Mn) as a green fluorescent material. Also, for example (Y,Gd)BO 3 : ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66C09K11/77
Inventor 户田健司佐藤峰夫大野庆司宫崎进武田隆史
Owner SUMITOMO CHEM CO LTD
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