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Package method for high-gamut white-light quantum-dot light emitting diode (LED)

A packaging method and technology of red light quantum dots, which are applied in the field of white LED backlight, can solve problems such as difficult large-scale industrialization, difficult curing of packaging glue, and damage to packaging glue, so as to reduce difficulty and product defect rate, improve quality, and inspire high efficiency effect

Active Publication Date: 2016-08-17
WUHU JUFEI PHOTOELECTRIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these two implementation methods are complex in process, low in light conversion efficiency, and high in cost, making it difficult to achieve large-scale industrialization.
For this reason, some researchers have tried to encapsulate quantum dot phosphors in LED lamp beads to obtain white light with a high color gamut. However, due to the existence of quantum dot phosphors, it is difficult to mix with the packaging glue, and it is easy to agglomerate and fail, and mixing impurities will destroy Encapsulation glue, making the encapsulation glue hard to cure and other technical problems, so it is difficult to make substantial progress in related research

Method used

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  • Package method for high-gamut white-light quantum-dot light emitting diode (LED)
  • Package method for high-gamut white-light quantum-dot light emitting diode (LED)
  • Package method for high-gamut white-light quantum-dot light emitting diode (LED)

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Embodiment 1

[0035] This embodiment provides a method for packaging high color gamut white light quantum dot LEDs, including the following steps:

[0036] a. Add 50 parts by weight of organic solvent n-hexane to 1 part by weight of BaS red light quantum dot phosphor powder with a peak emission wavelength of 600nm to obtain a red light quantum dot solution; to 1 part by weight of AgInS with a peak emission wavelength of 430nm 2 Add 50 parts by weight of organic solvent cyclohexane to the blue light quantum dot fluorescent powder to obtain a blue light quantum dot solution. 6nm, blue light quantum dot phosphor particle size is 4nm;

[0037] b. ultrasonically treating the red light quantum dot solution and the blue light quantum dot solution respectively at a water bath temperature of 25° C. at a frequency of 15 KHz for 10 minutes to obtain a clear quantum dot solution;

[0038] c. Add 1 part by weight of the blue light quantum dot solution to 1 part by weight of the red light quantum dot so...

Embodiment 2

[0044] This embodiment provides a method for packaging high color gamut white light quantum dot LEDs, including the following steps:

[0045] a. To 1 part by weight of NaCl and In with a peak emission wavelength of 660nm 2 o 3 Add 2000 parts by weight of an organic solvent n-octane to the red light quantum dot fluorescent powder to obtain a red light quantum dot solution; add 1500 parts by weight of an organic solvent toluene, two Chlorotoluene to obtain a blue light quantum dot solution, the particle size of the red light quantum dot fluorescent powder is 8nm, and the particle size of the blue light quantum dot fluorescent powder is 3nm, both of which are commercially available fluorescent powder;

[0046] b. ultrasonically treating the red light quantum dot solution and the blue light quantum dot solution respectively at a water bath temperature of 45° C. at a frequency of 120 KHz for 90 minutes to obtain a clear quantum dot solution;

[0047] c. Add 50 parts by weight of ...

Embodiment 3

[0053] This embodiment provides a method for packaging high color gamut white light quantum dot LEDs, including the following steps:

[0054] a. Add 150 parts by weight of organic solvent methylene chloride to 1 part by weight of InP, CdS, and CdSe red light quantum dot phosphors with a peak emission wavelength of 620nm to obtain a red light quantum dot solution; to 1 part by weight of CdTe with a peak emission wavelength of 450nm , ZnS, ZnSe blue light quantum dot fluorescent powder, add 50 parts by weight organic solvent chloroform, obtain blue light quantum dot solution, described red light quantum dot fluorescent powder and blue light quantum dot fluorescent powder are commercially available fluorescent powder, wherein red light quantum dot The particle size of phosphor powder is 6nm, and the particle size of blue light quantum dot phosphor powder is 3nm;

[0055] b. ultrasonically treating the red light quantum dot solution and the blue light quantum dot solution respecti...

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Abstract

The invention discloses a package method for a high-gamut white-light quantum-dot light emitting diode (LED). The package method comprises the following steps of (a) separately adding an organic solvent to red-light quantum-dot fluorescent powder and blue-light quantum-dot fluorescent powder; (b) carrying out ultrasonic processing on the solution; (c) preparing a mixed quantum-dot solution; (d) adding package glue to the mixed quantum-dot solution, and uniformly stirring the package glue; (e) removing the organic solvent; (f) adding green-light rare-earth fluorescent powder; and (g) dropping the mixed fluorescent glue to an LED support fixed with an ultraviolet chip, roasting and curing the mixed fluorescent glue to obtain an LED light bead. By the package method, the high-gamut white-light LED is obtained, and the gamut value of the LED back-light bead is greatly increased and can reach over 92% of NTSC; the organic solvent is taken as a connection bridge, so that quantum dots and the package glue are uniformly mixed, the agglomeration failure phenomenon of the quantum dot fluorescent powder is prevented, and the quality of the high-gamut white-light LED bead is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of white light LED backlights, and in particular relates to a packaging method for high color gamut white light quantum dot LEDs. Background technique [0002] With the continuous advancement of technology, LED backlights have gradually become mainstream backlights. Compared with traditional CCFL backlights, LED backlights have many advantages such as high color gamut, high brightness, long life, energy saving and environmental protection, and real-time color control. The high-color-gamut LED backlight makes the screens of electronic products such as TVs, mobile phones, and tablet computers that use it have more vivid colors and a higher degree of color reproduction. [0003] Currently commonly used LED backlights generally use blue light chips to excite YAG yellow light phosphors. Due to the lack of red light components in the backlight, the color gamut can only reach NTSC 65%-72%. In order to further impr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/50H01L33/52
CPCH01L33/504H01L33/52H01L2933/0041H01L33/502B82Y20/00C09K11/08Y10S977/774Y10S977/95Y02B20/00H01L33/50H01L2933/0083
Inventor 张志宽高丹鹏张妮
Owner WUHU JUFEI PHOTOELECTRIC TECH CO LTD
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