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Preparation method of red CuInS2-ZnS core-shell structure quantum dot

A cuins2-zns, core-shell structure technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, nanotechnology, etc. Easy to clean and other problems, to achieve the effect of simplifying the preparation process, improving the utilization rate of raw materials, and facilitating purification treatment

Active Publication Date: 2018-04-24
XIAMEN XINDECO IOT & OPTPELECTRONICS TECH INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, CuInS is simply prepared by hot injection method. 2 It is difficult to precisely control the reaction wavelength when quantum dots are used, but when simply using solvothermal preparation, CuInS prepared under solvothermal conditions 2 / ZnS quantum dots will contain a large number of organic by-products, resulting in products that are difficult to clean and CuInS 2 / ZnS quantum dots yield is low

Method used

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  • Preparation method of red CuInS2-ZnS core-shell structure quantum dot
  • Preparation method of red CuInS2-ZnS core-shell structure quantum dot
  • Preparation method of red CuInS2-ZnS core-shell structure quantum dot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of CuInS 2 quantum dot

[0030] Weigh 0.0952g CuI, 0.1460g In(CH 3 COO) 3 Put it in the liner of a hydrothermal kettle, add 15ml of dodecanethiol, stir evenly, tighten the hydrothermal kettle, and react at 180°C for 6h to obtain CuInS 2 Quantum dots, let stand to cool to room temperature.

[0031] (2) Purify CuInS 2 quantum dot

[0032] The solution obtained in the above (1) was placed in a 50ml centrifuge tube, centrifuged in an electric centrifuge at a speed of 12000r / min for 3min, and the resulting supernatant was placed in a 50ml three-necked flask for later use.

[0033] (3) Preparation of zinc buffer solution

[0034] Weigh the Zn(CH 3 COO) 2 Put 0.3670g in a 25ml three-neck flask, add 1ml of octadecene, 0.5ml of dodecyl mercaptan, and 1.5ml of oleylamine. After building the reaction device, stir and pump 3 times, then heat and stir at 80°C under a nitrogen atmosphere ,stand-by.

[0035] (4)CuInS 2 / Preparation of ZnS quantum dots

[...

Embodiment 2

[0043] (1) Preparation of CuInS 2 quantum dot

[0044] Weigh 0.0476g CuI, 0.1460g In(CH 3 COO) 3 Put it in the liner of a hydrothermal kettle, add 15ml of dodecanethiol, stir evenly, tighten the hydrothermal kettle, and react at 180°C for 6h to obtain CuInS 2 Quantum dots, let stand to cool to room temperature.

[0045] (2) Purify CuInS 2 quantum dot

[0046] The solution obtained in the above (1) was placed in a 50ml centrifuge tube, centrifuged in an electric centrifuge at a speed of 12000r / min for 3min, and the resulting supernatant was placed in a 50ml three-necked flask for later use.

[0047] (3) Preparation of zinc buffer solution

[0048] Weigh the Zn(CH 3 COO) 2 Put 0.1835g in a 25ml three-neck flask, add 0.5ml of octadecene, 0.25ml of dodecanethiol, and 0.75ml of oleylamine. After building the reaction device, stir and pump 3 times, then heat at 80°C under nitrogen atmosphere Stir and set aside.

[0049] (4)CuInS 2 / Preparation of ZnS quantum dots

[00...

Embodiment 3

[0055] (1) Preparation of CuInS 2 quantum dot

[0056] Weigh 0.0238g CuI, 0.1460g In(CH 3 COO) 3 Put it in the liner of a hydrothermal kettle, add 15ml of dodecanethiol, stir evenly, tighten the hydrothermal kettle, and react at 180°C for 6h to obtain CuInS 2 Quantum dots, let stand to cool to room temperature.

[0057] (2) Purify CuInS 2 quantum dot

[0058] The solution obtained in the above (1) was placed in a 50ml centrifuge tube, centrifuged in an electric centrifuge at a speed of 12000r / min for 3min, and the resulting supernatant was placed in a 50ml three-necked flask for later use.

[0059] (3) Preparation of zinc buffer solution

[0060] Weigh the Zn(CH 3 COO) 2 Put 0.3670g in a 25ml three-neck flask, add 1ml of octadecene, 0.5ml of dodecyl mercaptan, and 1.5ml of oleylamine. After building the reaction device, stir and pump 3 times, then heat and stir at 80°C under a nitrogen atmosphere ,stand-by.

[0061] (4)CuInS 2 / Preparation of ZnS quantum dots

[...

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Abstract

The invention discloses a preparation method of a red CuInS2-ZnS core-shell structure quantum dot. The preparation method includes the steps: weighing Cu element and In element raw materials in proportion, adding a certain quantity of S element raw materials, performing reaction for 5-7 hours in a hydrothermal reactor at the temperature of 180-200 DEG C, cooling the raw materials and then centrifuging the raw materials to obtain CuInS2 quantum dot solution; mixing the CuInS2 quantum dot solution and zinc element solution, exhausting air, increasing the temperature to 200-220 DEG C, keeping thetemperature for 30-60 minutes, performing quick chilling with cold water and repeatedly performing dissolution and precipitation and cleaning to obtain CuInS2 / ZnS quantum dot solution. A precursor CuInS2 is prepared by a solvothermal method, ZnS is coated by a hot injection method, the preparation method is simple and convenient, raw material use ratio is increased, and cleaning is facilitated.

Description

technical field [0001] The invention belongs to the technical field of semiconductor quantum dot luminescent materials, in particular to a red core-shell structure quantum dot luminescent material CuInS 2 / ZnS, the present invention also relates to the preparation method of the luminescent material. Background technique [0002] Quantum dots (Quantum dots, QDs), also known as semiconductor nanocrystals, are approximately spherical in shape, and their three-dimensional dimensions are in the range of 2-10 nm, and have obvious quantum effects. Quantum dots are generally composed of group II-VI elements (such as CdS, CdSe, CdTe, ZnSe, ZnS, etc.) or group III-V elements (such as InP, InAs, etc.) or group I-III-VI compounds (such as CuInS 2 , CuInSe 2 etc.) Semiconductor materials can also be composed of two or more semiconductor materials to form a core / shell structure (such as common CdSe / ZnS, InP / ZnS, CuInS 2 / ZnS core / shell structure quantum dots, etc.). The quantum dots w...

Claims

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Application Information

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IPC IPC(8): C09K11/02C09K11/62B82Y20/00B82Y30/00B82Y40/00
CPCB82Y20/00B82Y30/00B82Y40/00C09K11/02C09K11/623
Inventor 王育华李天荣张刚毅陈宜波魏岚
Owner XIAMEN XINDECO IOT & OPTPELECTRONICS TECH INST CO LTD