Quantum dot/epoxy resin microspheres and preparation method thereof as well as color conversion film

A technology of color conversion film and epoxy resin, applied in the direction of photosensitive materials used in optomechanical equipment, etc., can solve the problems of insufficient filtering methods, poor color saturation, and low utilization rate of light sources, etc., to ensure photoluminescence Features, pure color, easy to disperse effect

Inactive Publication Date: 2015-09-30
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a quantum dot / epoxy resin microsphere and its preparation method and color conversion film, aiming at solving the problem that the light filtering method used in the existing liquid crystal display is not thorough enough, and the picture color gamut Relatively low, poor color saturation, and low light source utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A preparation method of CdTe / CdS quantum dots / epoxy resin microspheres containing -OH groups on the surface: add 0.8g gum arabic, 0.4g sodium dodecylbenzenesulfonate and 100ml deionized water, stirring to fully dissolve. Under stirring conditions, 10g bisphenol A type epoxy resin E51, 0.5g oleic acid-stabilized CdTe / CdS quantum dots emitting red light, 10g propylene oxide butyl ether and 1.5g modified 2-methylimidazole were mixed Obtain an oil phase system uniformly, then add the oil phase system into a three-necked flask, stir and emulsify for 20 minutes, then slowly raise the temperature to 80-85°C, and react at a constant temperature for 4 hours. After the reaction was over, the heating was stopped and allowed to cool down to room temperature naturally. The product was filtered and dried to obtain the primary product. The initial product was post-cured at 150°C for 1 hour to obtain CdTe / CdS quantum dots / epoxy resin microspheres containing -OH groups on the surface....

Embodiment 2

[0059] A preparation method of CdSe / ZnS quantum dots / epoxy resin microspheres containing -OH and epoxy groups on the surface: add 1g alkylphenol polyoxyethylene ether, 0.6g dodecylsulfuric acid to a 250ml three-necked reaction flask Sodium, 0.2g polyethylene glycol and 100ml deionized water, stirred to fully dissolve. Under stirring conditions, 5g bisphenol A type epoxy resin E51, 5g alicyclic epoxy resin 711, 0.4g trioctylphosphine stabilized CdSe / ZnS quantum dots emitting green light, 10g propylene oxide benzyl Mix ether and 0.8g 2-ethyl-4-methylimidazole evenly to obtain an oil phase system, then add the oil phase system into a three-necked flask, stir and emulsify for 30 minutes, slowly raise the temperature to 80-85°C, and react at constant temperature for 3 hours . After the reaction was over, the heating was stopped and allowed to cool down to room temperature naturally. The product is filtered and dried to obtain CdSe / ZnS quantum dots / epoxy resin microspheres contain...

Embodiment 3

[0068] A preparation method of CdTe / CdS / ZnS quantum dots / epoxy resin microspheres containing -OH, epoxy groups and double bond groups on the surface: add 0.7g gum arabic and 0.4g dodecane to a 250ml three-necked reaction flask Sodium alkylbenzene sulfonate and 80ml deionized water, stir to make it fully dissolved. Under stirring conditions, the CdTe / CdS / ZnS quantum dots, 10g propylene oxide butyl ether and 0.8g vinylimidazole are mixed homogeneously by 10g bisphenol A type epoxy resin E44, 0.5g oleic acid stable emission blue light, The oil phase system was obtained, and then the oil phase system was added into a three-necked flask, stirred and emulsified for 20 minutes, then slowly heated to 80-85°C, and reacted at a constant temperature for 3 hours. After the reaction was over, the heating was stopped and allowed to cool down to room temperature naturally. The product is filtered and dried to obtain CdTe / CdS / ZnS quantum dots / epoxy resin microspheres containing -OH, epoxy gr...

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Abstract

The invention discloses a quantum dot / epoxy resin microspheres and a preparation method thereof as well as a color conversion film. The quantum dot / epoxy resin microspheres are prepared by encapsulating quantum dots in epoxy resin microsphere cavities. By encapsulating the quantum dots in the epoxy resin microsphere cavities, the probability of causing agglomeration due to interaction of the quantum dots is effectively reduced, and the probabilities that the quantum dots are in contact with a photoresist external environment and are interfered and damaged during photoetching of a photoresist are reduced. Meanwhile, due to the interaction between the epoxy resin microspheres and a photoresist resin matrix, the quantum dots can be dispersed into the photoresist more easily, and are dispersed uniformly without agglomeration. Therefore, the photoluminescence properties of the quantum dots are beneficially ensured. A sub-pixel unit with R / G / B colors corresponding to the prepared color conversion film is purer in color and higher in saturation degree, and the backlight source energy utilization efficiency and the luminous efficiency are also improved obviously.

Description

technical field [0001] The invention relates to the technical field of liquid crystal displays, in particular to a quantum dot / epoxy resin microsphere, a preparation method thereof, and a color conversion film. Background technique [0002] An important method for liquid crystal display (LCD) to realize full-color display is backlight plus filter technology. The backlight is generally a blue light emitting diode (Light Emitting Diode, LED) that excites YAG phosphor to emit white backlight. The white backlight is a mixed light of blue light and yellow light, and the color is not pure. The color filter mainly plays the role of filtering. The white light from the backlight passes through the color filter corresponding to the red, green, and blue pigment photoresist on each pixel to form red, green, and blue light, and finally mixes to form a color image. . Color filters are prepared by forming a photoresist film with pigments dispersed. Its light filtering characteristics de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/02C08K3/30C08K3/28C08K3/10C08K3/32G03F7/004
Inventor 李雪付东谢相伟孙闲文濮怡莹
Owner TCL CORPORATION
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