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White-light LED (Light-emitting Diode) manufactured by utilizing quantum-dot fluorescent powder and manufacturing method thereof

A technology of quantum dots and phosphors, which is applied in the field of white LED and its preparation, can solve problems such as low color rendering, narrow color gamut, and poor stability, and achieve the effects of low operating temperature, short production time, and high stability

Active Publication Date: 2012-02-01
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a white light LED made of quantum dot phosphor, which solves the problems of low color rendering, narrow color gamut and poor stability in current LED technology.

Method used

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  • White-light LED (Light-emitting Diode) manufactured by utilizing quantum-dot fluorescent powder and manufacturing method thereof
  • White-light LED (Light-emitting Diode) manufactured by utilizing quantum-dot fluorescent powder and manufacturing method thereof
  • White-light LED (Light-emitting Diode) manufactured by utilizing quantum-dot fluorescent powder and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Such as figure 1 As shown, the white light LED manufactured by using quantum dot phosphor powder of the present invention includes a heat dissipation base 1, gold wire 2, quantum dot and silica gel mixture 3, purple or blue light chip 4, light-taking lens 5, filled silica gel 6 and electrodes 7. Two electrodes 7 are fixed on both ends of the heat dissipation base 1, and the purple or blue light chip 4 is fixed on the heat dissipation base 1 and between the two electrodes. The two electrodes are respectively connected to the purple or blue light chip 4 through gold wires 2, The quantum dot and silica gel mixture 3 is covered on the purple or blue light chip 4, and the silica gel 6 is filled. Two electrodes 7, the gold wire 2, the quantum dot and silica gel mixture 3 and the purple or blue light chip 4 are covered on the heat dissipation base 1, and the silica gel 6 is filled. A light-taking lens 5 is arranged on the outside. Among them, the quantum dots are carbon quant...

Embodiment 2

[0030] Its LED structure is the same as in Embodiment 1. The quantum dot fluorescent powder is a mixed quantum dot in which blue carbon quantum dots and yellow CdTe quantum dots are compounded at a ratio of 5:1, and then the quantum dot mixture is mixed in silica gel at a ratio of 10:90, and coated on the existing On the violet chip (the emission wavelength is 370nm) with the crystal bonded wire fixed, bake at 150°C for 60 minutes to cure, cover the lens, and fill the lens with high refractive index filling glue, and then place it in an oven at 150°C The white light LED can be prepared after the filling glue is cured by lower baking for 60 minutes.

Embodiment 3

[0032] Its LED structure is the same as in Embodiment 1. The quantum dot fluorescent powder is blue, yellow and red carbon quantum dots mixed with quantum dots in a ratio of 1:2:3, and then the quantum dot mixture is mixed in silica gel at a ratio of 15:85, and coated Bake at 150°C for 60 minutes on the violet chip (with an emission wavelength of 390nm) that has been fixed and bonded to make it solidify, cover the lens, and fill the lens with high refractive index filler, and then place it in the oven Baking at 150° C. for 60 minutes to cure the filler can produce a white LED.

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Abstract

The invention discloses a white-light LED (Light-emitting Diode) manufactured by utilizing quantum-dot fluorescent powder, aiming to solving the problems of lower color rendering property, narrower color range, poor stability and the like of the traditional LED technology. In the invention, the white-light LED (Light-emitting Diode) manufactured by utilizing the quantum-dot fluorescent powder comprises a heat-radiating base 1, gold wires 2, a quantum dot and silica gel mixture 3, a purple light or blue light chip 4, a light extraction lens 5, filler silica gel 6 and two electrodes 6, wherein the two electrodes 7 are fixed at two ends of the heat-radiating base 1, the purple light or blue light chip 4 is fixed on the heat-radiating base 1 and between the two electrodes 7, the two electrodes 7 are respectively connected with the purple light or blue light chip 4 through the gold wires 2, the quantum dot and silica gel mixture 3 covers on the purple light or blue light chip 4, the fillersilica gel 6 is used for covering the two electrodes 7, the gold wires 2, the quantum dot and silica gel mixture 3 and the purple light or blue light chip 4 on the heat-radiating base 4, and the light extraction lens 5 is arranged outside the filler silica gel 6.

Description

technical field [0001] The invention relates to a white light LED and a preparation method thereof, more specifically to a white light LED manufactured by using quantum dot fluorescent powder and a preparation method thereof, belonging to the technical field of semiconductor lighting. Background technique [0002] LED is a new type of solid-state light source. It has attracted much attention due to its advantages of environmental protection, low energy consumption, low heat generation, long life and small size. It has become a hot spot in the fields of optoelectronics and lighting engineering. Among them, white LEDs, as a new generation of lighting sources, are gradually being favored by people, and are mainly used in display screens and display light sources, landscape lighting, automotive lights, small-size backlights, and decorations. [0003] At present, the technical solutions for obtaining white light LEDs are mainly divided into LED chip combination and fluorescent co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/50H01L33/00C09K11/65C09K11/88
CPCY02B20/181Y02B20/00
Inventor 陈苏郭新余子夷周进
Owner NANJING UNIV OF TECH
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