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Novel method for preparing CdSeS quantum dot

A technology of quantum dots and a new method, applied in the new field of preparing CdSeS quantum dots, can solve the problems of high price, complicated process, difficult operation, etc., and achieve the effects of good stability, high fluorescence intensity, and narrow half-peak width.

Inactive Publication Date: 2008-12-24
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 methods mainly adopt the preparation process of core / shell quantum dots, using flammable, explosive and expensive raw materials, such as Cd(CH 3 ) 2 Such as organic cadmium materials, the process is complex, unsafe, and difficult to operate

Method used

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Embodiment Construction

[0015] The new preparation method of CdSeS quantum dots is divided into four parts: (a) preparation of TOPS; (b) preparation of TOPSe; (c) synthesis of CdSeS quantum dots; (d) post-treatment.

[0016] (a) Preparation of TOPS

[0017] Add 1.3g of S to a 50ml three-necked flask (reactor A), transfer 25ml of TOP, heat up to 110°C under the protection of argon, and stir for 10 hours to obtain a TOPS liquid containing 52mgS / ml.

[0018] (b) Preparation of TOPSe

[0019] Add 1.0 g of Se to a 25 ml three-neck flask (reactor B), transfer 10 ml of TOP, heat up to 110° C. under the protection of argon, and stir for 10 hours to obtain TOPSe liquid.

[0020] (c) Synthesis of CdSeS quantum dots

[0021] In a 100ml four-neck flask (reactor C), 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 argon, and heat up under stirring. When the temperature of reactor C reaches 260-3...

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Abstract

The invention discloses a novel method for preparing CdSeS quantum spot. The method comprises the following steps that: inorganic substances such as cadmium oxide or cadmium acetate are taken as a raw material, and the CdSeS quantum spot is prepared at a certain temperature. The method avoids the complicated preparation process of the prior nuclear / housing quantum spot and overcomes the shortcomings that the organic cadmium such as Cd(CH3) 2 is flammable and combustible and the price is high. The method has simple and convenient operation, good repetitiveness, safety and easy implementation, and low cost. The prepared CdSeS quantum spot has high fluorescence intensity, narrow half-peak width, high quantum productivity and good stability.

Description

[0001] The invention relates to a new method for preparing CdSeS 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 luminescent materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/88C09K11/54
Inventor 赵国锋曹世东沙印林谢伟
Owner 天津游瑞量子点技术发展有限公司
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