A long afterglow material and its preparation method and application

A technology of long afterglow materials and carbon dots, applied in luminescent materials, data processing applications, chemical instruments and methods, etc., can solve problems such as difficult to obtain RTP materials, and achieve the effects of low cost, wide application range, and simple operation
CN111154480BActive Publication Date: 2021-07-23SOUTH CHINA AGRI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTH CHINA AGRI UNIV
Publication Date
2021-07-23

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Abstract

The invention provides a long afterglow material and its preparation method and application. The long-lasting material is composed of carbon dots in the matrix, and is in a glassy state, and has the properties of fluorescence, delayed fluorescence and phosphorescence; the material has longer life, higher phosphorescence quantum efficiency, and better stability, and has been successfully fabricated from Heteroatom carbon dots have produced a metal-free afterglow material with a lifetime of up to 2682ms and a phosphorescent quantum efficiency of up to 17.5%. The present invention also provides a preparation method of the long afterglow material. The carbon dots and the matrix are subjected to one-step heat treatment to form a glassy state. The method has universal adaptability, and the obtained material has better phosphorescence effect, simple operation, low cost, It is green and environmentally friendly, has a wide range of applications, and can realize mass production. At the same time, the long afterglow material has achieved good results in the application of three-mode anti-counterfeiting technology and information encryption, and has broad application prospects in the field of optoelectronics, especially in the fields of anti-counterfeiting and information encryption technologies.
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Description

technical field

[0001] The invention belongs to the field of composite functional materials, in particular to a long afterglow material and its preparation method and application. Background technique

[0002] Afterglow materials include chamber phosphorescence, persistent luminescence, and delayed fluorescence materials. Due to its long lifetime and broad Stokes transition, phosphorescence has attracted a wide range of applications in optoelectronics, photodynamic therapy, sensing, data recording, bioscience technology, and security systems. But so far, room-temperature phosphorescent (RTP) materials are generally inorganic or metal complexes, which usually contain toxic heavy metals, are expensive and unstable. Therefore, it is of great significance to research and develop low-cost, multi-purpose, excellent performance and environment-friendly metal-free RTP materials.

[0003] Carbon dots (CDs) have become a current research hotspot for metal-free RTP materials due to t...

Claims

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