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Pure organic room temperature phosphor material and preparation method and application thereof

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

Active Publication Date: 2017-03-15
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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  • Pure organic room temperature phosphor material and preparation method and application thereof
  • Pure organic room temperature phosphor material and preparation method and application thereof
  • Pure organic room temperature phosphor material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

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) 1 g of folic acid was dissolved in 100 ml of deionized water, and stirred thoroughly 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 aqu...

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Abstract

The invention belongs to the technical field of luminescent materials, and particularly relates to a pure organic room temperature phosphor material and a preparation method and application thereof. The preparation method comprises the following steps that 1, carbon quantum dots with abundant elements N and O and biuret are mixed and dissolved into water or ethyl alcohol on the basis that the mass ratio of the carbon quantum dots to the biuret is 1:(40-40,000), and the mixture are stirred to be uniform to obtain a reaction mixture; 2, the reaction mixture obtained in the step 1 is filtered, a filtrate is dried and ground in sequence, and the pure organic room temperature phosphor material is obtained. According to the method, the raw materials are purely organic, low in price and environmentally friendly, the synthesis method is simple, can be implemented under normal temperature and normal pressure, and is suitable for large-scale production; the prepared pure organic room temperature phosphor material is safe, environmentally friendly, long in decay life, the decay time can reach several seconds, and the great application and popularization value is achieved on the aspects of light-emitting devices or phosphorescence materials or counterfeiting resistance or the like.

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 Applications(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
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