Panchromatic adjustable long-life room-temperature phosphorescent material and preparation method thereof

A room-temperature phosphorescence and full-color adjustable technology, which is applied in the field of phosphorescent materials to achieve the effects of high yield, simple preparation method, and cheap and easy-to-obtain raw materials

Active Publication Date: 2021-12-21
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a full-color adjustable long-life room temperature phosphorescent material and its preparation method for the problem that the phosphorescent color is limited in a narrow wavelength range

Method used

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  • Panchromatic adjustable long-life room-temperature phosphorescent material and preparation method thereof
  • Panchromatic adjustable long-life room-temperature phosphorescent material and preparation method thereof
  • Panchromatic adjustable long-life room-temperature phosphorescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Add 6000mg of boric acid and 6mg of citric acid into a glass bottle filled with 25mL of deionized water. After preliminary dissolution, place the glass bottle open in a heating block and heat it on a heating platform at 110°C to fully dissolve the boric acid and citric acid. In water, continue to heat overnight to completely evaporate the deionized water to obtain a mixture of citric acid and boric acid a.

[0041] Heat and melt the mixture a of citric acid and boric acid at 170°C, cool to room temperature after 5h, and obtain blocky blue phosphorescent carbon dot composites

[0042] figure 2 a and 3 are the transmission electron micrographs of the blue phosphorescent material obtained in this example, and the X-ray diffraction spectrum can be seen from the figure that the prepared room temperature phosphorescent material is a carbon dot composite, and the carbon dot is composed of citric acid and boric acid reactants The carbon dots are generated and uniformly disp...

Embodiment 2

[0044] Add 6000mg of boric acid and 100mg of citric acid into a glass bottle filled with 25mL of deionized water. After initial dissolution, place the glass bottle in a heating block and heat it on a heating platform at 110°C to fully dissolve the boric acid and citric acid. In water, continue to heat overnight to completely evaporate the deionized water to obtain a mixture b of citric acid and boric acid.

[0045] Heat and melt the mixture b of citric acid and boric acid at 170°C, cool to room temperature after 5h, and obtain a green phosphorescent carbon dot composite in block form

[0046] figure 2 b and image 3 They are the transmission electron microscope photos of the green phosphorescent material obtained in this example, and the X-ray diffraction spectrum can be seen from the figure that the prepared room temperature phosphorescent material is a carbon dot composite, and the carbon dots are generated in situ by the reaction of citric acid and boric acid and are un...

Embodiment 3

[0048] Add 6000mg of boric acid and 400mg of citric acid into a glass bottle filled with 25mL of deionized water. After initial dissolution, place the glass bottle open in a heating block and heat it on a heating platform at 110°C to fully dissolve the boric acid and citric acid. In water, continue to heat overnight to completely evaporate the deionized water to obtain a mixture c of citric acid and boric acid.

[0049] Heat and melt the mixture c of citric acid and boric acid at 180°C, cool to room temperature after 5h, and obtain blocky yellow phosphorescent carbon dot composites

[0050] figure 2 c and image 3 They are the transmission electron micrographs of the yellow phosphorescent material obtained in this example, and the X-ray diffraction spectrum. It can be seen from the figure that the prepared room temperature phosphorescent material is a carbon dot composite, and the carbon dots are generated in situ by the reaction of citric acid and boric acid and are unifo...

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Abstract

The invention provides a panchromatic adjustable long-life room-temperature phosphorescent material and a preparation method thereof. The long-life room-temperature phosphorescent material is a compound composed of boron oxide polycrystals and carbon dots, wherein the carbon dots are generated in situ and are uniformly dispersed and embedded in the boron oxide polycrystals, and the boron oxide polycrystals are blocky polycrystals generated by in-situ dehydration of boric acid molecules. According to the invention, the long-life room-temperature phosphorescent material has a panchromatic adjustable long-life room-temperature phosphorescent color, and the phosphorescent color can be adjusted from blue to red to cover the whole visible region; and the average decay life of the long-life room-temperature phosphorescent material can reach 113.90-581.76 ms in a room-temperature air environment, the maximum decay life can reach 1311.07 ms in a 77K vacuum environment, the afterglow time which can be distinguished by naked eyes can reach 5-12 s in the room-temperature air environment, and the long-life room-temperature phosphorescent material is stable in phosphorescence luminescence performance and can be stored for a long time.

Description

technical field [0001] The invention belongs to the field of phosphorescent materials, in particular to a full-color adjustable long-life room temperature phosphorescent material and a preparation method thereof, in particular to a full-color adjustable carbon dot composite-based long-life room temperature phosphorescent material and its preparation method and application. Background technique [0002] Long-lived room temperature phosphorescence has important application value in the fields of optoelectronics, photovoltaics, photocatalysis, high-sensitivity biological imaging, and information encryption [Adv.Funct.Mater.2018, 1802657]. At present, compared with traditional metal-doped compounds [Angew.Chem.Int.Edit.2019,58,7278], pure organic room-temperature phosphorescent materials are due to their low consumption and general synthesis strategies (such as crystal engineering, host-guest doping and H-aggregation) has become a promising substitute for [Angew.Chem.Int.Edit.2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/65
CPCC09K11/025C09K11/65Y02E10/549
Inventor 邱惠斌丁远飞
Owner SHANGHAI JIAO TONG UNIV
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