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White-light LED fluorescent powder prepared based on copper (I)-bromine hybrid fluorescent material

A fluorescent material and fluorescent powder technology, applied in the field of fluorescent powder, can solve the problems of poor fluorescence stability and limited application, and achieve the effect of low cost

Active Publication Date: 2020-05-29
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these copper-halogen cluster hybrid materials have high fluorescence quantum yields, their poor fluorescence stability limits their application in the field of LEDs.

Method used

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  • White-light LED fluorescent powder prepared based on copper (I)-bromine hybrid fluorescent material
  • White-light LED fluorescent powder prepared based on copper (I)-bromine hybrid fluorescent material
  • White-light LED fluorescent powder prepared based on copper (I)-bromine hybrid fluorescent material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 0.1g orange-red copper-bromine hybrid phosphor [N(C 3 h 7 ) 4 ] 2 [Cu 4 Br 6 ] with 0.1g commercial green phosphor (Ba,Sr) 2 SiO 4 :Eu 2+ , 1.8g blue phosphor BAM:Eu 2+ (BP) White light ternary phosphor obtained by mixing and grinding.

[0023] Take 1g of the white light ternary phosphor and 2g of ZH-903 silicone electronic potting glue, mix evenly, apply it on the unpackaged LED ultraviolet chip (365nm, 1W, 350mA), and dry it at 60°C to get the white light LED device ( figure 1 ).

[0024] Such as figure 2 As shown, the correlated color temperature Tc=4035K, color rendering index: Ra=94.1, chromaticity coordinates: x=0.3764y=0.3664 / u'=0.2266v obtained when the drive current is 20mA and the voltage is 3V. '=0.3309duv=-3.726e-003, luminous flux Φ=0.4296lm. LED constant temperature = 10.0 degrees, test temperature 25 degrees.

Embodiment 2

[0026] Take 0.2g orange-red copper-bromine hybrid phosphor [N(C 3 h 7 ) 4 ] 2 [Cu 4 Br 6 ] with 0.2g commercial green phosphor (Ba,Sr) 2 SiO 4 :Eu 2+ , 3.6g blue phosphor BAM:Eu 2+ (BP) White light ternary phosphor obtained by mixing and grinding.

[0027] Take 1g of the white light ternary phosphor and 4g of silicone resin (German WEICON silicone resin Silicon A adhesive sealant) and mix evenly, then apply it on the unpackaged LED ultraviolet chip (365nm, 1W, 350mA), and dry it at 60°C , that is, a white LED device is obtained.

[0028] Such as image 3 As shown, the correlated color temperature obtained when the drive current of the prepared white LED is 60mA and the voltage is 2V: Tc=4065K, color rendering index: Ra=94.1, chromaticity coordinates: x=0.3753, y=0.3662 / u'= 0.2259, v'=0.3307, duv=-3.482e-003, luminous flux Φ=1.535lm. LED constant temperature = 10.0 degrees, test temperature 25 degrees.

Embodiment 3

[0030] Take 0.3g orange-red copper-bromine hybrid phosphor [N(C 3 h 7 ) 4] 2 [Cu 4 Br 6 ] with 0.3g commercial green phosphor (Ba,Sr) 2 SiO 4 :Eu 2+ , 5.4g blue phosphor BAM:Eu 2+ (BP) White light ternary phosphor obtained by mixing and grinding.

[0031] Take 0.5g of the white light ternary phosphor and 2g of Kraft K-9761 two-component epoxy resin encapsulant, mix evenly, and then apply it to the unpackaged LED ultraviolet chip (365nm, 1W, 350mA). After drying, a white LED device is obtained.

[0032] Such as Figure 4 As shown, the correlated color temperature obtained when the drive current of the prepared white LED is 120mA and the voltage is 3V: correlated color temperature: Tc=4149K, color rendering index: Ra=94.2, chromaticity coordinates: x=0.3724, y=0.3655 / u'=0.2243, v'=0.3302, duv=-2.916e-003, luminous flux Φ=3.108lm. LED constant temperature = 10.0 degrees, test temperature 25 degrees.

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Abstract

The invention provides white-light LED fluorescent powder prepared based on a copper (I)-bromine hybrid fluorescent material, and belongs to the field of fluorescent powder. The preparation method ofthe white-light LED fluorescent powder comprises the steps: mixing orange-red copper-bromine hybrid fluorescent powder with a chemical formula of [N(C3H7)4]2[Cu4Br6] with commercial (Ba,Sr)2SiO4:Eu<2+> green fluorescent powder and BAM:Eu<2+>(BP) blue fluorescent powder, and regulating to obtain white fluorescent powder which is used for preparing a white-light LED. The white-light LED fluorescentpowder has the advantages that the preparation method is simple, the cost is low, the related color temperature can reach 4263K, and the color rendering index can reach 94.9, and can be applied to thefield of actual illumination.

Description

technical field [0001] The invention belongs to the field of fluorescent powder, and in particular relates to a white LED fluorescent powder prepared based on copper (I)-bromine hybrid fluorescent material. Background technique [0002] Light-emitting diode (LED) is a lighting device that can convert electrical energy into light energy. Compared with traditional incandescent lamps, it has the advantages of high efficiency and long life, so it is regarded as the fourth generation lighting technology. White light emitting diodes (WLEDs) are widely used in the field of lighting. At present, white light LED preparation methods can be divided into three types. The first method is to prepare white light devices by combining red, green and blue LEDs; the second method is to directly emit white light through multiple active layers; the third method is to apply phosphor powder to the chip. The method is to smear the phosphor on the chip, the chip excites the phosphor to emit fluores...

Claims

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Application Information

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IPC IPC(8): C07C211/63C09K11/06C09K11/79H01L33/50
CPCC07C211/63C09K11/06C09K11/7734H01L33/502Y02B20/00
Inventor 冯亮陈淑琴王昱
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI