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A kind of nano-silver loaded graphene and quantum dot co-doped polymer and its application

A technology of quantum dots and graphene, applied in the field of polymer preparation, can solve the problems of high cost of noble metal-doped quantum dots, inconvenient to prepare random lasers, difficult to change the emission band, etc., and achieves a relaxed preparation environment and a good industrialization prospect. , the effect of short preparation cycle

Active Publication Date: 2022-04-05
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of random lasers of dye-doped polymer dispersed liquid crystals are: high laser emission threshold, wide half-maximum full width, poor photostability, complex synthesis process, difficult to change light-emitting band, long production cycle and high cost; in polymer dispersed liquid crystal structure At a dispersible concentration, it is not convenient to prepare random lasers; and the cost of doping quantum dots with noble metals is high, causing great environmental pollution, and the finished solution is prone to cluster precipitation and poor stability
So from a practical point of view, it seems interesting to develop random lasers based on graphene quantum dots, but there is little research on the use of graphene quantum dots in random lasers

Method used

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  • A kind of nano-silver loaded graphene and quantum dot co-doped polymer and its application
  • A kind of nano-silver loaded graphene and quantum dot co-doped polymer and its application
  • A kind of nano-silver loaded graphene and quantum dot co-doped polymer and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A nano-silver-loaded graphene and quantum dot co-doped polymer is prepared from the following components in parts by mass:

[0038]

[0039] The nano-silver loaded graphene and quantum dot co-doped polymer is prepared by the following method:

[0040] (1) Stir the photosensitive polymer polymethyl methacrylate and the photoinitiator phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide in the above parts by mass in the dark at 50° C. for 5 min, A mixed solution was formed.

[0041] (2) Add ZnCdSeS / ZnS semiconductor quantum dots into the mixed solution according to the above mass fraction, perform ultrasonic dispersion for 2 hours, and then mechanically stir at 50°C for 1 hour in the dark to obtain solution A.

[0042] (3) adding nano-silver-loaded graphene into the mixed solution A according to the above-mentioned mass fraction, first performing ultrasonic dispersion for 2 hours, and then mechanically stirring at 50° C. for 1 hour in the dark to obtain solution B;

[00...

Embodiment 2

[0046]

[0047] The nano-silver loaded graphene and quantum dot co-doped polymer is prepared by the following method:

[0048] (1) Stir the photosensitive polymer polymethyl acrylate and the photoinitiator 2-hydroxy-methylphenylpropan-1-ketone in the above parts by mass at 50° C. in the dark for 10 minutes to form a mixed solution.

[0049] (2) CsPbBr 3The perovskite semiconductor quantum dots were added into the mixed solution according to the above mass fraction, ultrasonically dispersed for 2 hours, and then mechanically stirred at 50° C. for 3 hours in the dark to obtain solution A.

[0050] (3) adding nano-silver-loaded graphene into the mixed solution A according to the above-mentioned mass fraction, first performing ultrasonic dispersion for 2 hours, and then mechanically stirring at 50° C. for 1 hour in the dark to obtain solution B;

[0051] (4) The solution B is cured by ultraviolet light with a wavelength of 365 nm, and the curing time is 5 seconds.

[0052] ...

Embodiment 3

[0054]

[0055] The nano-silver loaded graphene and quantum dot co-doped polymer is prepared by the following method:

[0056] (1) Stir the photosensitive polymer polyethyl acrylate and the photoinitiator benzoin dimethyl ether at 50° C. in the dark for 5 minutes in the above parts by mass to form a mixed solution.

[0057] (2) Add ZnCdSeS / ZnS semiconductor quantum dots into the mixed solution according to the above mass fraction, perform ultrasonic dispersion for 4 hours, and then mechanically stir at 50° C. for 2 hours in the dark to obtain solution A.

[0058] (3) adding nano-silver-loaded graphene into the mixed solution A according to the above-mentioned mass fraction, first performing ultrasonic dispersion for 2 hours, and then mechanically stirring at 50° C. for 1 hour in the dark to obtain solution B;

[0059] (4) The solution B is cured by ultraviolet light with a wavelength of 300 nm, and the curing time is 5 seconds.

[0060] image 3 Shown is the optical micro...

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Abstract

The invention relates to a co-doped polymer of nano-silver loaded graphene and quantum dots and a preparation method thereof, which is prepared from the following components in parts by mass: 1-3.5 parts of nano-silver-loaded graphene; 5-20 parts of semiconductor quantum dots 20-74 parts of photosensitive polymer; 1-5 parts of photoinitiator. The invention also relates to applying the obtained nano-silver loaded graphene and quantum dot co-doped polymer to a random laser. The raw materials of the invention are simple and easy to obtain, and the cost is low; and the obtained random laser has the characteristics of short preparation period, simple preparation process, low production cost, higher emission light intensity and low threshold value, so it has broad application prospects.

Description

technical field [0001] The invention belongs to the field of quantum dots, and in particular relates to a polymer co-doped with nanometer silver-loaded graphene and quantum dots. The invention also relates to a preparation method and application of a polymer co-doped with nanometer silver-loaded graphene and quantum dots. Background technique [0002] Laser technology has been widely used in many fields such as industry, medical treatment and communication. Random lasers are a research topic of continuing relevance and importance, especially in the development of novel low-cost and mirrorless laser technologies. The core components of random lasers include three elements: pump source, working medium and resonant cavity. The resonant cavity selects the light with a certain frequency and the same direction as the most preferential amplification, and suppresses the light of other frequencies and directions to form a standing wave oscillation, and finally emits in the form of l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/12C08L33/08C08K9/12C08K3/08C08K3/04C08K3/30C08K3/16C08K13/06H01S3/00H01S3/08
CPCC08K9/12C08K3/08C08K3/042C08K3/30C08K13/06C08K3/16H01S3/005H01S3/08C08K2201/011C08K2003/0806C08K2003/3009C08K2003/3036C08L33/12C08L33/08
Inventor 王颖王志文曹明轩张彦军杜大明乐庆胜
Owner WUYI UNIV
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