Preparation for CdTeS quantum dots

A technology of quantum dots and storage solution, which is applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of complex process, high price, difficult operation, etc., and achieve the effect of high fluorescence intensity, good stability, and narrow half-peak width.

Inactive Publication Date: 2008-01-16
天津游瑞量子点技术发展有限公司
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Problems solved by technology

[0005] At present, the common chemical preparation method mainly adopts the preparation process of core / shell quantum dots, using Cd(CH 3 ) 2 Inflammable, explosive and expensive raw materials such as organic cadmium, complex process, unsafe and difficult to operate

Method used

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Experimental program
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Embodiment Construction

[0013] The preparation of CdTeS quantum dots is divided into three parts: (a) preparation of Te and S stock solutions; (b) synthesis of CdTeS quantum dots; (c) post-treatment.

[0014] (a) Preparation of Te and S stock solutions

[0015] Add 5 mg Te powder and 320 mg S powder into a 25 ml round bottom flask (reactor A), transfer 5 ml OA and 1 ml TOP, and obtain TeS stock solution after dissolving.

[0016] (b) Synthesis of CdTeS quantum dots

[0017] In a 100ml four-neck flask (reactor B), install stirring, a thermometer and an argon protection device, accurately weigh 400mg of CdO, add 20ml of OA, 5ml of TOA and 20ml of TOP, replace the clean air with Ar, and heat up while stirring. When the temperature of reactor B reaches 260-300°C, add stock solution A dropwise, maintain 260°C for 30 seconds, remove the heating device, and when the temperature drops to 100°C, pour the reaction solution into a 100ml Erlenmeyer flask containing 50ml of methanol In (reactor C), seal and sto...

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Abstract

The invention discloses a method of preparing CdTeS quantum dots at a certain temperature with the raw materials of cadmium oxide or cadmium acetate or other inorganic substances which avoid the complication of preparing core-shell quantum dots and the shortcomings that organic cadmium like Cd(CH3)2 is inflammable and explosive and is expensive. The method is easy for operation and reproducing, safe in application and low in cost. The CdTeS quantum dots are provided with high fluorescent intensity, narrow half peak breadth, high quantum yield, good stability and a longer emission wavelength(infrared and near-infrared, Gama is equal to 620-728nm).

Description

technical field [0001] The invention relates to a preparation method of CdTeS quantum dots Background technique [0002] Quantum dots (quantum dots, QDs), also known as semiconductor nanocrystals (semiconductor nanocrystal), are nanocrystalline grains composed of II-VI or III-V elements. The ultrafine size of quantum dots leads to a quantum scale effect that gives them unique optical and electronic properties. Quantum dots can emit fluorescence of different colors due to their different sizes (or different compositions), and a single wavelength of light can be used to excite quantum dots of various colors. In recent years, due to its unique photoluminescent properties, quantum dots have attracted more and more attention. They were first applied in life science research in 1998. Subsequently, their research and application scope involved multiple disciplines such as physics, chemistry, materials, and biology. A new interdisciplinary subject. [0003] Common quantum dot lum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78
Inventor 曹世东赵国锋沙印林谢伟
Owner 天津游瑞量子点技术发展有限公司
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