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Preparation method of bicolor fluorescent semiconductor nanomaterial based on Mn-doped CuInS2/ZnS

A technology of two-color fluorescence and nanomaterials, applied in the direction of luminescent materials, nanotechnology for materials and surface science, nanotechnology, etc., can solve serious problems such as self-absorption, application limitations, toxicity, etc., and achieve the effect of superior optical performance

Inactive Publication Date: 2014-05-07
SOUTHEAST UNIV
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Problems solved by technology

The commonly used white LED based on CdSe quantum dots has been investigated, but its application is limited due to its toxicity and severe self-absorption

Method used

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  • Preparation method of bicolor fluorescent semiconductor nanomaterial based on Mn-doped CuInS2/ZnS
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  • Preparation method of bicolor fluorescent semiconductor nanomaterial based on Mn-doped CuInS2/ZnS

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preparation example Construction

[0022] The preparation method of quantum dot nano material comprises the following steps:

[0023] (1) Combine CuI, In(Ac) 3 , Dodecanethiol (DDT), heated to 100°C under argon atmosphere and stirred for 30 minutes, and then heated to 230°C for 5 minutes to obtain CuInS 2 Quantum dot core;

[0024] (2) Cool the above solution to 130°C and inject Zn(Ac) 2 (Zinc acetate) / oleylamine / octadecene (ODE) mixed solution, then heated to 240 ° C for 90 minutes to generate CuInS 2 / ZnS quantum dots, the obtained quantum dots are purified and dissolved in n-hexane;

[0025] (3) Add octadecene (ODE) to the quantum dots purified in (2), and in an argon atmosphere, heat to 150°C and inject Mn(Ac) 2 (manganese acetate) / oleylamine mixed solution, and kept at this temperature for 1 hour, then heated to 240 ° C, injected Zn (Ac) 2 The mixed solution of / oleic acid / DDT / ODE reacted at this temperature for 1 hour and then cooled to room temperature to obtain CuInS 2 / ZnS: Quantum dot nano...

Embodiment 1

[0026] Embodiment 1 Preparation of Quantum Dot Nanomaterials

[0027] Step 1: CuInS 2 Preparation of quantum dots, take 0.0096g (0.05mmol) CuI, 0.146g (0.5mmol) In(Ac) 3 , 5ml DDT in a 100ml three-neck flask, degassed with Ar at 40°C for 15 minutes, then raised the temperature to 100°C and stirred for 30 minutes, then raised the temperature to 230°C for 5 minutes to obtain CuInS 2 Quantum dot core.

[0028] Step 2: Cool the above solution to 130°C and inject Zn(Ac) 2 / oleylamine / octadecene mixed solution, then heated to 240°C for 90 minutes to generate CuInS 2 / ZnS quantum dots, namely CIZS alloy. The injected Zn(Ac) 2 The amount of the quantum dot is 0.9-1mmol, and the injected oleylamine and ODE are respectively 2.5ml and 6ml. The quantum dots are purified and dissolved in n-hexane.

[0029] Step 3: Add 5ml of octadecene (ODE) to the quantum dots obtained in the second step, heat to 150°C in an argon atmosphere, and inject Mn(Ac) 2 / Oleylamine, and keep it at this tem...

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Abstract

The invention relates to a preparation method of a bicolor fluorescent semiconductor nanomaterial based on Mn-doped CuInS2 / ZnS. The preparation method comprises the following steps: (1) preparing CuInS2 / ZnS quantum dots, purifying the CuInS2 / ZnS quantum dots and then dissolving the CuInS2 / ZnS quantum dots in n-hexane; (2) adding the CuInS2 / ZnS quantum dots obtained by the step (1) into octadecene (ODE), heating to 150 DEG C under an argon gas environment, injecting a mixed solution of Mn(Ac)2 (manganese acetate) and oleylamine and maintaining for 1 hour at the 150 DEG C; then heating to 240 DEG C, injecting the mixed solution of Zn(Ac)2, oleic acid / DDT (Dichloro-Diphenyl-Trichloromethane) and the ODE and reacting for 1 hour at 240 DEG C; and cooling to a room temperature, thereby obtaining the quantum dot nanomaterial of CuInS2 and ZnS: Mn / ZnS. The quantum dot nanomaterial can be used for replacing yellow fluorescent powder to be prepared into a white LED (Light Emitting Diode). The Mn-doped CuInS2 / ZnS quantum dots are of a nanomaterial which is nontoxic and environment-friendly, and has two fluorescence peak positions within a visible light range, wherein the peak positions are between 525nm and 590nm or so; the relative strength of the two fluorescence peaks can be regulated by regulating the content of the Mn.

Description

technical field [0001] The invention relates to a CuInS doped with Mn 2 / Preparation method of ZnS core-shell structure nanocrystals. Background technique [0002] White LED has many advantages that other traditional lighting sources cannot match, such as high luminous efficiency, low power consumption, long life, and environmental protection. Therefore, it is considered to be a new generation of green light source in the 21st century, which can replace incandescent lamps and become the most potential lighting source. The current conventional method for preparing white LED devices is to coat yellow YAG:Ce phosphors on blue LED chips. The phosphor converts part of the blue light emitted by the LED chip into yellow light, and the yellow light is mixed with the transmitted blue light to form white light. As a new generation of light-emitting materials, semiconductor nanocrystals have attracted widespread attention due to their excellent optical properties. They can replace p...

Claims

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Application Information

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IPC IPC(8): C09K11/62B82Y30/00B82Y40/00
Inventor 张家雨黄博张辉朝崔一平代倩
Owner SOUTHEAST UNIV
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