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A quantum dot white light emitting diode

A technology of light-emitting diodes and quantum dots, applied in semiconductor devices, electrical components, circuits, etc., can solve problems such as uneven light color and insufficient color rendering of white LED lamps and lanterns

Active Publication Date: 2018-09-21
XIAMEN CHANGELIGHT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the phosphor powder must be evenly coated on the chip surface, otherwise there will be spots with uneven light color, and the white light LED lamp light source converted from phosphor powder has insufficient color rendering in the lighting field

Method used

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  • A quantum dot white light emitting diode
  • A quantum dot white light emitting diode

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Embodiment Construction

[0023] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific examples.

[0024] like Figure 1-2 What is shown is a quantum dot white light-emitting diode disclosed by the present invention. On a substrate 101, an N-GaN layer 102, an active layer 103, a P-GaN layer 104, and a transparent electrical contact layer 107 are arranged in sequence. The N-GaN layer 102 and the P-GaN layer 104 are respectively connected to the N electrode 105 and the P electrode 106,

[0025] The transparent electrical contact layer 107 is formed by uniformly mixing red light, yellow light, green light quantum dots and conductive particles dissolved in an epoxy resin solution, and distributing them on the P-GaN layer 104 by spin coating or dripping. The transparent electrical contact layer 107 directly prepared by mixing red light, yellow light, green light quantum dots and conductive particles can not only...

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Abstract

Disclosed in the invention is a quantum-dot white-light light-emitting diode comprising a substrate, an N-GaN layer, an active layer, a P-GaN layer, an N electrode, a P electrode and a transparent electric contact layer. The N-GaN layer, the active layer, the P-GaN layer, and the transparent electric contact layer are arranged on the substrate successively; the N-GaN layer and the P-GaN layer are connected with the N electrode and the P electrode. Conductive particles and red-light, yellow-light and green-light quantum dots are arranged in the transparent electric contact layer. According to the invention, the transparent electric contact layer having the conductive particles and red-light, yellow-light and green-light quantum dots is arranged on the P type layer, thereby forming the transparent electric contact layer generating multi-wavelength fluorescent light. After the transparent electric contact layer is stimulated by blue light emitted by a gallium-nitride-based light-emitting diode, white light emitting of a single chip is realized.

Description

technical field [0001] The invention relates to the technical field of light emitting diodes, in particular to a quantum dot white light emitting diode. Background technique [0002] Gallium nitride-based LEDs are usually used in existing lighting LEDs (light-emitting diodes). The light emitted by gallium nitride-based LEDs is only monochromatic blue light. Phosphor powder needs to be added during packaging. The light emitted by the phosphor powder excited by blue light is mixed with the blue light of the LED to form white light. [0003] In the prior art, the phosphor powder must be evenly coated on the chip surface, otherwise there will be spots with uneven light color, and the white light LED lamp light source converted from phosphor powder has insufficient color rendering in the lighting field. [0004] Quantum dot luminescent materials have the advantages of high color purity and various luminous colors, and the mixed use of various quantum dots can achieve high color ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/06H01L33/62
CPCH01L33/06H01L33/62
Inventor 周弘毅张永陈凯轩李俊贤刘英策陈亮魏振东李小平吴奇隆蔡立鹤邬新根黄新茂
Owner XIAMEN CHANGELIGHT CO LTD
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