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Method for manufacturing white light LED with wide color gamut

A wide color gamut, LED chip technology, applied in electrical components, circuits, semiconductor devices, etc., can solve the problems of high color temperature, low color rendering index, narrow color gamut of white LEDs, etc., and achieve high emission light intensity and low operating temperature. , the effect of short production time

Active Publication Date: 2014-08-13
江苏康纳思光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for manufacturing wide-color gamut white LEDs, that is, a method of coating blue LED chips with a light-emitting layer to configure wide-color gamut white light, which solves the problem of narrow color gamut, high color temperature, and low color rendering index of traditional white LEDs. defect

Method used

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  • Method for manufacturing white light LED with wide color gamut
  • Method for manufacturing white light LED with wide color gamut
  • Method for manufacturing white light LED with wide color gamut

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1). The preparation of macromonomer-modified core-shell quantum dots CdTe / CdS, the method is as follows:

[0033] a. Preparation of catalytic chain transfer agent CoBF

[0034] Add 3g of cobalt acetate and 2.5g of diacetyl to 250mL of diethyl ether pre-gassed with nitrogen for 2 hours to prepare a suspension, then add 15mL of boron trifluoride ether solution as a catalyst, and stir the reaction at room temperature to obtain a brown precipitate. The precipitate was filtered, washed with ice water, and dried at room temperature. The dried brown solid was recrystallized twice in methanol and dried to obtain CoBF as a brown powder.

[0035] b. Preparation of PMAA macromolecular ligands with double bonds at the end by catalytic chain transfer polymerization

[0036] Methacrylic acid and distilled water were pretreated to remove free oxygen from the solution. 0.3g of initiator VA-044 and 10mg of catalyst CoBF were dissolved in 2mL of acetone, then added to a three-necked fl...

Embodiment 2

[0044] (1). The preparation of macromer-modified core-shell quantum dots CdTe / CdS / CdS, the method is as follows:

[0045] Take by weighing 0.3127gPMAA macromonomer and be dissolved in the CdTe / CdS quantum dot solution prepared in 20g embodiment 1, and be placed in the 100mL four-necked flask, drop in the 5g aqueous solution that is dissolved in 0.1142g cadmium chloride wherein, Stir for 2 hours to adjust the pH value to about 8 with 2mol / L NaOH solution after the ligand and cadmium ion are fully coordinated, and pass N at room temperature 2 After deoxygenation for 30 minutes, place in a microwave reactor and heat to 95°C, inject 20 g of aqueous solution dissolved with 0.078 g of sodium sulfide, and stop the reaction after 130 min. The prepared CdTe / CdS / CdS core-shell quantum dot solution was then precipitated with a large amount of ethanol, and then dispersed after centrifugation at 6000 rpm for 15 min.

[0046] (2). Preparation of wide color gamut white LED

[0047] In the ...

Embodiment 3

[0049] (1). The preparation of macromonomer-modified core-shell quantum dots CdTe / ZnS, the method is as follows:

[0050] Take by weighing 0.3127gPMAA macromonomer and be dissolved in the CdTe quantum dot solution prepared in 20g embodiment 1, and be placed in the 100mL four-neck flask, drop in the 5g aqueous solution that is dissolved in 0.1142g zinc chloride wherein, stir 2h After the ligand is fully coordinated with the zinc ion, adjust the pH value to about 8 with 2mol / L NaOH solution, and pass N at room temperature. 2 After deoxygenation for 30 minutes, place in a microwave reactor and heat to 95°C, inject 20 g of aqueous solution dissolved with 0.078 g of sodium sulfide, and stop the reaction after 15 min. The prepared CdTe / ZnS quantum dot solution was then precipitated with a large amount of ethanol, and then dispersed after centrifugation at 6000 rpm for 15 min.

[0051] (2). Preparation of wide color gamut white LED

[0052] Such as figure 2 As shown, in the third...

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Abstract

The invention discloses a method for manufacturing white light LED with wide color gamut, which can expand color gamut of the white light LED, reduce color temperature and increase color rendering index under high light efficiency so as to make configured white light rays be softer. The color rendering index of the white light LED can reach above 90, and the color temperature can be continuously adjusted in the range of 2800K-10000K. The method for manufacturing white light LED with wide color gamut comprises the following steps of: using a light-emitting layer to coat a blue light LED chip to configure white light with wide color gamut, wherein the light-emitting layer is a mixture of nuclear shell quantum dots and LED special fluorescent powders, which is mixed in silica gel or epoxy resin and is coated to the blue light LED chip, mixed mass ratio of the nuclear shell quantum dots to the LED special fluorescent powders is 1 : 99 to 40 : 60, and mixed mass ratio of the mixture of the nuclear shell quantum dots and the LED special fluorescent powders to the silica gel or the epoxy resin is 5 : 95 to 25 : 75.

Description

technical field [0001] The invention relates to a method for manufacturing LEDs, more specifically to a method for manufacturing white LEDs with wide color gamut, and belongs to the field of semiconductor lighting and display. Background technique [0002] LED is a new type of solid-state light source, which has the advantages of green, high efficiency, and energy saving, and is considered to be the next-generation lighting source. As a general lighting source, white LED is gradually being favored by people. It has been widely used in outdoor lighting, indoor lighting, engineering lighting and other fields. It is a new light source in line with the national "energy saving and emission reduction" policy. [0003] At present, the more common preparation method for realizing white light LED is the phosphor powder coating light conversion method: that is, use a blue chip with an emission peak range of 440nm to 480nm, coat YAG yellow phosphor powder that can be excited by blue li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/00H01L33/50
Inventor 陈苏周进朱琳高德康
Owner 江苏康纳思光电科技有限公司
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