Method for forming nitrogen and sulfur co-doped graphene quantum dots

A technology of graphene quantum dots and nitrogen sulfur, which is applied in the field of element-doped graphene quantum dots, can solve the problems of complex preparation process of carbon quantum dots, the chemical inertness of zinc sulfide limits the wide application of carbon quantum dots, etc.
CN104812697AActive Publication Date: 2015-07-29BEIJING XINNA INT NEW MATERIALS TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING XINNA INT NEW MATERIALS TECH CO LTD
Publication Date
2015-07-29

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Abstract

The invention relates to a method for forming graphene quantum dots, and in particular, to doped graphene quantum dots. The graphene quantum dots are co-doped with nitrogen and sulfur. The co-doped elements introduce a new type and high density of surface state of graphene quantum dots, leading to high yield and excitation-independent emission.
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Description

technical field

[0001] The invention relates to a method for preparing graphene quantum dots, in particular to an element-doped graphene quantum dot. The graphene quantum dots are co-doped with nitrogen and sulfur, and the above-mentioned co-doping elements introduce a new type and high-density surface state graphene quantum dots, so that the graphene quantum dots have high yield and excitation-independent characteristics. Background technique

[0002] Quantum dots (QDs) are nanoparticles with size effect and optoelectronic properties, which are used in applications such as energy-saving displays and lighting tools, photovoltaic devices and biomarkers. Compared with other fluorescent (FL) materials (traditional dyes or polymers), quantum dots have many advantages, such as strong fluorescence, high photostability, and resistance to biological metabolic degradation.

[0003] However, most high-performance quantum dots are limited by the toxicity of heavy metal elements such a...

Claims

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