Prepn. method of low toxicity CdSe/ZnSe nucleocapsid quantal-points

A technology of core-shell quantum dots and low toxicity, which is applied in the preparation of semiconductor CdSe/ZnSe core-shell nanomaterials and the field of fluorescent nanomaterials. It can solve the problems of quantum dot instability, large surface defects, and impact on safety, and achieve low prices. , good monodispersity, and the effect of raw material safety
CN1831081AInactive Publication Date: 2006-09-13CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
Publication Date
2006-09-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention relates to low toxicity CdSe / ZnSe core shell quanta point preparation method, it belongs to luminescent material technique field. First Cd0, stearic acid and octadecene are used to make cadmium precursor solution under nitrogen gas condition. Then selenium stock solution is prepared by fill selenium powder, positive three octyl phosphine and octadecene into sealing tank. Zinc stock solution is made by dissolve zinc into 4ml toluene. Oxide positive three octyl phosphine and hexadecyl amine are filled in the cadmium solution, the selenium stock solution is cooled down under nitrogen gas condition to get CdSe quanta point. Then zinc stearate stock solution is added and cooled down to 30-50 degrees centigrade to get CdSe / ZnSe core shell quanta point. The operation of this invention is simple, cost is low and high efficiency quanta point is get. Quanta yield ratio is advanced from 2-10% before cladding to more than 60% after cladding.
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Description

technical field

[0001] The invention belongs to the technical field of luminescent materials, relates to fluorescent nanomaterials, and is a preparation method of semiconductor CdSe / ZnSe core-shell nanomaterials. The invention adopts the high-temperature organic solvent of octadecene (ODE) to prepare CdSe / ZnSe core-shell quantum dots with high efficiency and low toxicity. Background technique

[0002] In recent years, semiconductor wide-bandgap group II-VI quantum dot materials have been fabricated by various methods, and they have shown attractive application prospects in optoelectronic devices, such as light-emitting diodes, quantum dot lasers, and biological probes. As well as optical converters or modulators, etc. Since Nie et al. reported on CdSe quantum dots in Science in 1998, II-VI, III-V semiconductor nanomaterials (CdSe, CdS, CdTe, ZnSe, InP, GaAs, etc.) Scholars at home and abroad have attached great importance to it, and have also achieved gratifying achievemen...

Claims

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