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A kind of pure organic room temperature phosphorescent material and its preparation method and application

A room temperature phosphorescence, organic technology, applied in luminescent materials, luminescent coatings, chemical instruments and methods, etc., can solve the problem of no large-scale preparation of pure organic room temperature phosphorescence materials, and achieve low price, pure organic raw materials, long-life phosphorescence emission Effect

Active Publication Date: 2018-12-11
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, there is no method for large-scale preparation of pure organic room-temperature phosphorescent materials based on carbon quantum dots at room temperature

Method used

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  • A kind of pure organic room temperature phosphorescent material and its preparation method and application
  • A kind of pure organic room temperature phosphorescent material and its preparation method and application
  • A kind of pure organic room temperature phosphorescent material and its preparation method and application

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Embodiment 1

[0030] This embodiment provides a method for preparing a pure organic room temperature phosphorescent material, which includes the following steps:

[0031] (1) 1g of folic acid was dissolved in 100ml of deionized water, and fully stirred for 10 minutes to obtain a mixed solution;

[0032] (2) Place the mixed solution obtained in step (1) in a 200ml polytetrafluoroethylene autoclave, and heat it at 260°C for 2 hours to obtain the initial solution;

[0033] (3) Centrifuge the initial solution obtained in step (2) at a speed of 9500 rpm for 20 minutes to remove the black precipitate in the lower layer, take the brownish-yellow clear liquid in the upper layer, and freeze-dry the brownish-yellow clear liquid in the upper layer for 72 hours to obtain black Carbon quantum dot powder rich in N and O elements, and then the carbon quantum dot powder is formulated into a 5mg / ml carbon quantum dot aqueous solution; after testing, the mass fractions of C, N, and O in the carbon quantum do...

Embodiment 2

[0037] This embodiment provides a method for preparing a pure organic room temperature phosphorescent material, which includes the following steps:

[0038] (1) 1g of folic acid was dissolved in 100ml of deionized water, and fully stirred for 10 minutes to obtain a mixed solution;

[0039] (2) Place the mixed solution obtained in step (1) in a 200ml polytetrafluoroethylene autoclave, and heat it at 260°C for 2 hours to obtain the initial solution;

[0040] (3) Centrifuge the initial solution obtained in step (2) at a speed of 9500 rpm for 20 minutes to remove the black precipitate in the lower layer, take the brownish-yellow clear liquid in the upper layer, and freeze-dry the brownish-yellow clear liquid in the upper layer for 72 hours to obtain black The carbon quantum dot powder that is rich in N, O element, then described carbon quantum dot powder is made into the carbon quantum dot aqueous solution of 5mg / ml;

[0041] (4) Take 500 μ l of the carbon quantum dot aqueous sol...

Embodiment 3

[0044] This embodiment provides a method for preparing a pure organic room temperature phosphorescent material, which includes the following steps:

[0045] (1) 1g of folic acid was dissolved in 100ml of deionized water, and fully stirred for 10 minutes to obtain a mixed solution;

[0046] (2) Place the mixed solution obtained in step (1) in a 200ml polytetrafluoroethylene autoclave, and heat it at 260°C for 2 hours to obtain the initial solution;

[0047] (3) Centrifuge the initial solution obtained in step (2) at a speed of 9500 rpm for 20 minutes to remove the black precipitate in the lower layer, take the brownish-yellow clear liquid in the upper layer, and freeze-dry the brownish-yellow clear liquid in the upper layer for 72 hours to obtain black The carbon quantum dot powder that is rich in N, O element, then described carbon quantum dot powder is made into the carbon quantum dot aqueous solution of 5mg / ml;

[0048] (4) Take 1500 μ l of the carbon quantum dot aqueous so...

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Abstract

The invention belongs to the technical field of luminescent materials, and in particular relates to a pure organic room temperature phosphorescent material and its preparation method and application. The preparation method comprises the following steps: S1, mixing and dissolving carbon quantum dots rich in N elements and O elements and biuret in water or ethanol at a mass ratio of 1:40 to 40,000, and stirring evenly to obtain a reaction mixture; S2. Filter the reaction mixture obtained in step S1, and dry and grind the obtained filtrate in sequence to obtain the obtained product. The method of the present invention has pure organic raw materials, low price, environment-friendly, simple synthesis method, can be operated under normal temperature and pressure, and is suitable for large-scale production; the prepared pure organic room temperature phosphorescent material is safe, green and environmentally friendly, has long decay life, and The time can reach several seconds, and has important popularization and application value in aspects such as light-emitting devices, phosphorescent coatings or anti-counterfeiting.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a pure organic room temperature phosphorescent material and its preparation method and application. Background technique [0002] Phosphorescent materials refer to materials that can still emit light after the excitation light is stopped, and last for a period of time. Compared with fluorescent materials, they have a longer decay life, so they have important application values ​​in the fields of anti-counterfeiting, information encryption and display. Pure organic room-temperature phosphorescent materials do not contain heavy metals and can observe phosphorescence at room temperature. Compared with organometallic phosphorescent materials, they are cheap, safe and non-toxic, and have broad application prospects. However, pure organic room-temperature phosphorescent materials are very scarce, and the existing preparation methods are not suitable for large-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/07C01B32/15B82Y20/00B82Y40/00H01L51/50H01L51/54C09D5/22
CPCC09K11/07B82Y20/00B82Y40/00C09D5/22H10K85/00H10K50/00
Inventor 周明李奇军
Owner TSINGHUA UNIV