Method for preparing LED by means of quantum dot composite fluorescent particles

A composite fluorescent and quantum dot technology, applied in electrical components, circuits, semiconductor devices, etc., can solve the problems of phosphor powder production cost and high energy consumption, narrow color gamut of LED technology, low color rendering index, etc., and achieve fluorescent thermal stability Good performance, wide excitation wavelength range, and high luminous efficiency

Inactive Publication Date: 2014-10-01
NANJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of high production cost, high energy consumption and excessive consumption of rare earth resources of current phosphors, narrow color gamut, low color rendering index and low stability in LED technology, and proposes a method using Method for preparing LED with quantum dot composite fluorescent particles

Method used

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  • Method for preparing LED by means of quantum dot composite fluorescent particles
  • Method for preparing LED by means of quantum dot composite fluorescent particles
  • Method for preparing LED by means of quantum dot composite fluorescent particles

Examples

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Effect test

Embodiment 1

[0021] Using ZnTe quantum dots and Sr 0.5 Ca 0.5 MoO 4 Preparation of Inorganic Fluorescent Particles to Obtain Composite Fluorescent Particles Sr 0.5 Ca 0.5 MoO 4 / ZnTe is used as a yellow phosphor, mixed in silica gel at a ratio of 5:100, and directly coated on the blue light chip. Filling glue, after the filling glue is cured at 100°C for 100 minutes, the LED device can be obtained, such as figure 1 As shown, this LED device emits yellow light.

Embodiment 2

[0023] Using red fluorescent CdTe quantum dots and NaLa(MoO 4 ) 2 Preparation of inorganic fluorescent particles to obtain composite fluorescent particles NaLa(MoO 4 ) 2 / CdTe is used as red phosphor, mixed in silica gel at a ratio of 10:100, and coated on the blue light chip. After the silica gel is cured in an oven at 105°C for 105 minutes, the light-taking lens is covered on the blue light chip and filled. Glue, the filling glue is cured at 105°C for 105 minutes to obtain a red LED. Such as figure 2 As shown, it can be seen that the composite fluorescent particle NaLa(MoO 4 ) 2 / CdTe as a red phosphor has higher fluorescence emission intensity and better fluorescence performance.

Embodiment 3

[0025] CdSe Quantum Dots and BaMoO Using Yellow Fluorescent Emission 4 Preparation of Inorganic Fluorescent Particles to Obtain Composite Fluorescent Particle BaMoO 4 / CdSe is used as a yellow phosphor, mixed in silica gel at a ratio of 20:100, and coated on the purple light chip. Filling glue, the filling glue is cured at 110°C for 110 minutes to obtain a yellow LED. Such as image 3 As shown, it can be seen that the composite fluorescent particles BaMoO 4 / CdSe as a yellow phosphor has higher fluorescence emission intensity and better fluorescence performance.

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Abstract

The invention relates to a method for preparing an LED by means of quantum dot composite fluorescent particles. The composite fluorescent particles are utilized as fluorescent powder and mixed into a silica gel proportionally and coat a purple or blue light chip. After the silica gel is solidified, the purple or blue light chip is covered with a light extraction lens and filled with filling gel. The LED is obtained after the filling gel is solidified. The preparation process of quantum dot and inorganic fluorescent particle composite light-emitting materials is simple in technology and low in cost and energy consumption, the fluorescent light of the fluorescent powder is high, the exciting light wavelength range is wide, the emitting light wavelength range is long and narrow, and the fluorescent light stability is good. The composite fluorescent materials with quantum dots of different sizes or kinds are utilized as the fluorescent powder for manufacturing a multi-color light-emitting LED device, and the LED device is high in light-emitting efficiency, high in display index, wide in color gamut and good in fluorescent thermostability.

Description

Technical field: [0001] The invention relates to a method for preparing LEDs by using quantum dot composite fluorescent particles, in particular to LEDs that use quantum dots and inorganic fluorescent substrates as phosphors to package luminescent materials to obtain multicolor light, and belong to the technical field of semiconductor lighting. Background technique: [0002] The new generation of lighting source semiconductor LED (Light Emitting Diode) has triggered a revolution in lighting industry technology and application with advantages that traditional light sources do not have. It is the trend of the times to replace traditional lighting sources with semiconductor LED solid-state light sources. Therefore, as a light conversion substance, phosphor plays a very important role. It directly affects the main indicators such as luminous efficiency, service life, color rendering index, and color temperature of white LED products. [0003] In recent years, with the deepening...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/00H01L33/50
CPCH01L33/502H01L33/505H01L33/507H01L2933/0041
Inventor 吕忆农陈虎刘云飞李冰艳张雪
Owner NANJING UNIV OF TECH
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