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Polysiloxane hybrid quantum dot nano material, preparation method and application thereof

A polysiloxane and nanomaterial technology, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems of poor stability, low quantum efficiency, quenching of aggregated fluorescence, etc., to overcome the poor stability, preparation method simple effect

Active Publication Date: 2020-05-22
广州居一安照明科技有限公司
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Problems solved by technology

However, the non-semiconductor quantum dots that have been reported so far, such as perovskite quantum dots, carbon quantum dots, silicon quantum dots, and metal chemical quantum dots, have problems such as poor stability, or aggregation fluorescence quenching, or low quantum efficiency. , although the above properties can be improved by compounding with inorganic or polymer materials, there are still problems such as difficulty in achieving electroluminescence due to excessive particle diameters.

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  • Polysiloxane hybrid quantum dot nano material, preparation method and application thereof
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  • Polysiloxane hybrid quantum dot nano material, preparation method and application thereof

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preparation example Construction

[0044] The present invention also provides a method for preparing polysiloxane hybrid quantum dot nanomaterials, comprising the steps of:

[0045] Take a certain amount of silane, reaction aids and solvents and mix them, and then place them in a high-pressure reactor to react at a certain reaction temperature to obtain polysiloxane hybrid quantum dots with a particle size of 1-20nm and / or 20-500nm nanomaterials.

[0046] Among them, the obtained polysiloxane hybrid quantum dot nanomaterials with a particle size of 1-20nm can be directly applied in LED light sources or QLED devices; while the particle size of the obtained polysiloxane hybrid quantum dot nanomaterials When the particle size is 20-500nm, the polysiloxane hybrid quantum dot nanomaterial with a particle size of 1-20nm is obtained through further processing by laser etching.

[0047]During the preparation process, the dosage ratio of silane, reaction aid and solvent is (0.3~3.0)ml:(0.1~1.5)g:(18~30)ml, the reaction...

Embodiment 1

[0053] Synthesis of polysiloxane hybrid quantum dot nanomaterial 1: Prepare 0.3ml N-[3-(trimethoxysilyl)propyl]ethylenediamine, 0.2g sodium citrate and 0.1g sodium hydroxide, mix the above The reaction raw materials were added to 30ml of deionized water, stirred magnetically for 30 minutes, then transferred to an autoclave, and reacted at 230° C. for 30 hours to obtain the polysiloxane hybrid quantum dot nanomaterial 1 . After testing, the nanomaterial 1 includes quantum dots with a volume percentage of 8% and polysiloxane with a volume percentage of 92%, wherein the quantum dots detected in this embodiment are carbon quantum dots and silicon quantum dots, and the The average particle size of the nanomaterials is 10 nm. The emission spectrum of the nanomaterial 1 is as figure 1 As shown, it can be seen from the figure that the main emission peak wavelength is about 470nm, which is blue broadband emission.

[0054] Manufacturing of QLED devices: The device structure is based ...

Embodiment 2

[0056] Synthesis of polysiloxane hybrid quantum dot nanomaterial 2: prepare 0.5ml 1-[3-(trimethoxysilyl)propyl]urea, 0.6g sodium citrate and EDTA-Na, and 0.2g sodium hydroxide , add the above-mentioned reaction raw materials to 30ml of a mixed solution of deionized water and ethylene glycol (the volume ratio of water to alcohol is 1:12), stir magnetically for 30 minutes, then transfer to an autoclave, and react at 300°C for 10h , the polysiloxane hybrid quantum dot nanomaterial 2 was obtained. After testing, the nanomaterial 2 includes quantum dots with a volume percentage of 20% and polysiloxane with a volume percentage of 80%, wherein the quantum dots detected in this embodiment are carbon quantum dots and silicon quantum dots, and the nanometer The average particle size of the material is 20nm, and the emission main peak wavelength is 480nm. Such as figure 2 As shown, it can be seen from the HRTEM image that the darker part is quantum dots, and its particle size is about...

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Abstract

The invention discloses a polysiloxane hybrid quantum dot nano material, which comprises quantum dots and polysiloxane, wherein the quantum dots are connected with the polysiloxane through chemical bonds to form nano particles with a particle size of 1-20 nm, and the quantum dots comprise silicon quantum dots and / or carbon quantum dots. The invention also provides a polysiloxane hybrid quantum dotnano material and application in an LED light source. According to the invention, the polysiloxane hybrid quantum dot nano material provided by the invention has excellent light, heat and chemical stability, overcomes the problem of poor stability of semiconductor quantum dots emitting blue light, and can be used as a blue light component in an electroluminescent material; and the service life ofa QLED device prepared from the polysiloxane hybrid quantum dot nano material at least reaches 80000 hours, and the QLED device has a commercial application value.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a polysiloxane hybrid quantum dot nano material and its preparation method and application. Background technique [0002] Existing commercial semiconductor quantum dots, because of their high quantum efficiency, wide color gamut of packaged LED light sources, and no backlight, can be used for curved and flexible folding displays, that is, they can be used in TVs and mobile phones, and are considered extremely Potential display technology development direction. As of now, QLED devices have not yet shown commercial prospects. In addition to the device manufacturing technology that still needs to be overcome, the biggest and arguably the only difficulty lies in the poor stability of blue light quantum dots, and the blue light quantum dots based on CdSe(ZnS) semiconductor itself The problem of energy level bandgap transition is difficult to overcome in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/59C09K11/65C09K11/02B82Y20/00B82Y30/00H01L51/50
CPCC09K11/65C09K11/59C09K11/025B82Y20/00B82Y30/00H10K50/115
Inventor 胡广齐姜虹
Owner 广州居一安照明科技有限公司
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