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Quantum dot-combined and ultraviolet-excited white LED light-emitting device

A light-emitting device, quantum dot technology, applied in electrical components, circuits, semiconductor devices, etc., can solve problems such as instability, poor color saturation and color temperature, and achieve the effects of clever matching, high quantum efficiency, and high efficiency

Active Publication Date: 2017-12-01
苏州轻光材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This commercial phosphor also has some disadvantages, mainly poor color saturation and color temperature instability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A quantum dot combined ultraviolet-excited white LED light-emitting device, comprising: a packaging substrate, an ultraviolet LED chip and fluorescent glue, the fluorescent glue includes red light quantum dot fluorescent glue, green light quantum dot fluorescent glue, blue light fluorescent glue, and the three kinds of fluorescent glue are respectively It is obtained from red light quantum dot phosphor powder, green light quantum dot phosphor powder, and blue light phosphor powder through the glue compounding process, of which:

[0020] Red light quantum dot phosphor: CdSe with shell structure 0.5 Te 0.5 Quantum dots, the structure of the coating shell of the red light quantum dots of the red light quantum dot phosphor is one of CdSe, CdS, ZnS, and CdSe / ZnS, and the emission peak position of the red light quantum dot phosphor is at 635-642nm ;

[0021] Green light quantum dot phosphor powder: CuInS quantum dots with a coating shell structure, the structure of the coat...

Embodiment 2

[0026] A quantum dot combined ultraviolet-excited white LED light-emitting device, comprising: a packaging substrate, an ultraviolet LED chip and fluorescent glue, the fluorescent glue includes red light quantum dot fluorescent glue, green light quantum dot fluorescent glue, blue light fluorescent glue, and the three kinds of fluorescent glue are respectively It is obtained from red light quantum dot phosphor powder, green light quantum dot phosphor powder, and blue light phosphor powder through the glue compounding process, of which:

[0027] Red light quantum dot phosphor: CdSe with shell structure 0.9 Te 0.1 Quantum dots, the structure of the coating shell of the red light quantum dots of the red light quantum dot phosphor is one of CdSe, CdS, ZnS, and CdSe / ZnS, and the emission peak position of the red light quantum dot phosphor is at 640-648nm ;

[0028] Green light quantum dot phosphor powder: CdSe quantum dots with a coating shell structure, the structure of the coati...

Embodiment 3

[0033] A quantum dot combined ultraviolet-excited white LED light-emitting device, comprising: a packaging substrate, an ultraviolet LED chip and fluorescent glue, the fluorescent glue includes red light quantum dot fluorescent glue, green light quantum dot fluorescent glue, blue light fluorescent glue, and the three kinds of fluorescent glue are respectively It is obtained from red light quantum dot phosphor powder, green light quantum dot phosphor powder, and blue light phosphor powder through the glue compounding process, of which:

[0034] Red light quantum dot phosphor: CdSe with shell structure 0.05 Te 0.95 Quantum dots, the structure of the coating shell of the red light quantum dots of the red light quantum dot phosphor is one of CdSe, CdS, ZnS, and CdSe / ZnS, and the emission peak position of the red light quantum dot phosphor is at 650-660nm ;

[0035] Green light quantum dot phosphor powder: InP quantum dots with a coating shell structure, the structure of the coat...

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PUM

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Abstract

The invention discloses a quantum dot-combined and ultraviolet-excited white LED light-emitting device, which comprises a package substrate, an ultraviolet LED chip and fluorescent adhesives, wherein the fluorescent adhesives include a red quantum dot fluorescent adhesive, a green quantum dot fluorescent adhesive and a blue fluorescent adhesive; the three fluorescent adhesives are obtained by treating red quantum dot fluorescent powder, green quantum dot fluorescent powder and blue fluorescent powder through an adhesive preparation technology separately, wherein a CdSe<x>Te<1-x> quantum dot of a coated shell structure is adopted by the red quantum dot fluorescent powder, and x is smaller than 1 and greater than or equal to 0; one of a CdSe quantum dot, a CuInS quantum dot and an InP quantum dot of the coated shell structure is adopted by the green quantum dot fluorescent powder; and the blue fluorescent powder is rare-earth blue fluorescent powder. The red quantum dot fluorescent adhesive, the green quantum dot fluorescent adhesive and the mature blue rare-earth fluorescent adhesive are combined, and all are excited by ultraviolet light and mixed into white light, so that the quantum dot-combined and ultraviolet-excited white LED light-emitting device is extremely flexible in adjustability, high in quantum efficiency, long in service life and high in color rendering index.

Description

technical field [0001] The invention relates to the technical field of LEDs, in particular to a quantum dot combined ultraviolet excitation white light LED lighting device. Background technique [0002] At present, the LED technology on the market has matured, and the white light LEDs that have been commercialized are based on the GaN matrix LED chip emitting 450-470 nm blue light and the phosphor powder coated on the surface to excite yellow light emission by blue light, mainly cerium-doped aluminum Yttrium Oxide phosphor. This commercial phosphor also has some disadvantages, mainly poor color saturation and instability of color temperature. [0003] The ultraviolet excitation white light LED light source is realized by exciting the red, green and blue phosphors of the three primary colors by LED light to produce various colors of fluorescence, and then mixing these fluorescence and LED light. The white light LED has high color rendering index, high luminous effect and ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/48H01L33/50
CPCH01L33/48H01L33/504
Inventor 马必鹉董安钢张家奇夏浩孚陈延兵
Owner 苏州轻光材料科技有限公司
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