White light luminescence device

A light-emitting device, blue light-emitting technology, applied in the direction of electrical components, circuits, semiconductor devices, etc., can solve the problems of low light efficiency of GaAs chips, difficult wavelength adjustment, practical application obstacles, etc., to achieve less lattice defects, small light attenuation, The effect of beneficial crystal field environment

Active Publication Date: 2018-10-09
JIANGSU BREE OPTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, the luminous efficiency of the GaAs chip in the infrared LED chip is low, which c

Method used

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  • White light luminescence device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A patch-type bracket is selected, and the blue LED chip with a wave peak range of 450-452nm is fixed in the bracket bowl cup through a crystal-bonding process, and the wire welding is completed. Weigh 8g of Y 2.93 Al 5 o 12 : Ce 0.07 Phosphor, 2g of Zn 3 Ga 1.98 GeO 8 :Cr 0.02 After the phosphor powder is mixed with 12g of organic silica gel, it is poured into the bowl through the dispensing process, and then through the curing process, a white LED with a color temperature of 5200K and a Ra of 71 can be obtained, and the peak of the infrared spectrum is at 810nm. The emission spectrum of this white LED is as figure 1 shown.

Embodiment 2

[0057] A patch-type bracket is selected, and the blue LED chip with a wave peak range of 450-452nm is fixed in the bracket bowl cup through a crystal-bonding process, and the wire welding is completed. Weigh 5g of Y 2.93 Al 5 o 12 : Ce 0.07 Phosphor, 2g of Zn 3 Ga 1.977 GeO 8 :Cr 0.022， Nd 0.001 After the phosphor powder is mixed with 10g of organic silica gel, it is poured into the bowl through the glue dispensing process, and then the white light LED with the color temperature of 5200K and Ra of 71 can be obtained through the curing process, and the peak of the infrared spectrum is at 840nm. The emission spectrum of this white LED is as figure 2 shown.

Embodiment 3

[0059] A patch-type bracket is selected, and the blue LED chip with a wave peak range of 450-452nm is fixed in the bracket bowl cup through a crystal-bonding process, and the wire welding is completed. Weigh 6g of Y 2.93 Al 5 o 12 : Ce 0.07 Phosphor, 1.3g of Zn 3 Ga 1.943 Ge 2 o 10 :Cr 0.057 After the phosphor powder is mixed with 11g of organic silica gel, it is poured into the bowl through the dispensing process, and then through the curing process, a white LED with a color temperature of 5200K and a Ra of 71 can be obtained, and the peak of the infrared spectrum is at 870nm. The emission spectrum of this white LED is as image 3 As shown, the excitation spectrum of the second phosphor is as Figure 16 shown.

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Abstract

The invention provides a novel white light luminescence device. The device comprises an excitation light source and a fluorescent layer configured to the upstream of the excitation light source. The fluorescent layer comprises a fluorescent powder group and a transparent material. The fluorescent powder group comprises a first fluorescent powder which is excited by the excitation light source to emit white light or visible light, and a second fluorescent powder which is simultaneously excited by the excitation light source to emit infrared light. In the invention, a white light color with highphotosynthetic efficiency can be provided, simultaneously, a high-efficient infrared wave band can be provided, and a new application characteristic is provided for an LED illumination light source.

Description

technical field [0001] The invention belongs to the field of LED general lighting, and in particular relates to a white light emitting device. Background technique [0002] With the development of lighting technology, adding additional functions in order to expand the general lighting market has become a development trend in the field of LED lighting. In order to be suitable for new applications in the fields of plant lighting, biomedicine or food testing, it is hoped that high color rendering white light illumination and 780-1500nm infrared light emission can be realized simultaneously. [0003] In the prior art, a device that simultaneously provides visible light and infrared light has been reported, but it is insufficient in terms of light conversion rate, light efficiency, spectral coverage, cost, etc., and cannot meet the needs of the development of the times. [0004] Chinese patent document CN200780015711.4 discloses a device that adopts a combination of LED chips of...

Claims

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Application Information

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IPC IPC(8): H01L33/50
CPCH01L33/504
Inventor 何锦华梁超符义兵
Owner JIANGSU BREE OPTRONICS CO LTD
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