Preparation method for doping type four-element multicolor fluorescent Ag-N-In-S quantum dot

A technology of ag-zn-in-s and quantum dots, which is applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems of high process requirements and complicated preparation of precursors, and achieve simplified preparation process, strong repeatability, The effect of short synthesis cycle

Active Publication Date: 2013-08-28
WENZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of a single precursor i

Method used

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  • Preparation method for doping type four-element multicolor fluorescent Ag-N-In-S quantum dot
  • Preparation method for doping type four-element multicolor fluorescent Ag-N-In-S quantum dot
  • Preparation method for doping type four-element multicolor fluorescent Ag-N-In-S quantum dot

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In the first step, weigh 34.2mg (0.2mmol) AgNO 3 , 44.8 mg (0.2 mmol) InCl 3 , 27.6mg (0.2mmol) ZnCl 2 , 282.8mg (1.0mmol) of oleic acid and 809.2mg (4mmol) of dodecyl mercaptan were placed in a 100mL three-necked flask, and 6mL of octadecene solvent was added.

[0032] In the second step, 32.4mg (1.0mmol) of sulfur powder was weighed, dissolved in 4mL of oleylamine, and placed in a 50°C water bath to fully dissolve the sulfur powder in oleylamine.

[0033] In the third step, under the conditions of magnetic stirring and argon protection, the precursor solution in the first step is heated to 60°C for 30min, and then the temperature is increased by 60°C→90°C→120°C→150°C→ During the heating process of 170°C, the temperature was raised to 170°C, and after stabilizing for 2 minutes, the S powder dissolved in oleylamine was injected and reacted for 5-90 minutes.

[0034] The fourth step is to take samples when the reaction time is 5min, 10min, 15min, 20min, 30min, 45min, ...

Embodiment 2

[0038] In the first step, weigh 17.2mg (0.1mmol) AgNO 3 , 44.2mg (0.2mmol) InCl 3 , 27.8mg (0.2mmol) ZnCl 2 , 283.2mg (1.0mmol) of oleic acid and 809.9mg (4mmol) of dodecyl mercaptan were placed in a 100mL three-necked flask, and 6mL of octadecene solvent was added.

[0039] In the second step, 32.2mg (1.0mmol) of sulfur powder was weighed, dissolved in 4mL of oleylamine, and placed in a 50°C water bath to fully dissolve the sulfur powder in oleylamine.

[0040] In the third step, under the conditions of magnetic stirring and argon protection, the precursor solution in the first step is heated to 60°C for 30min, and then the temperature is increased by 60°C→90°C→120°C→150°C→ During the heating process of 170°C, the temperature was raised to 170°C, and after stabilizing for 2 minutes, the S powder dissolved in oleylamine was injected and reacted for 5-90 minutes.

[0041] The fourth step is to take samples when the reaction time is 5min, 10min, 15min, 20min, 30min, 45min, 60...

Embodiment 3

[0045] The first step, the first step, weigh 6.9mg (0.04mmol) AgNO 3 , 44.5mg (0.2mmol) InCl 3 , 27.5mg (0.2mmol) ZnCl 2 , 282.6mg (1.0mmol) of oleic acid and 810.2mg (4mmol) of dodecyl mercaptan were placed in a 100mL three-necked flask, and 6mL of octadecene solvent was added.

[0046]In the second step, 32.0mg (1.0mmol) of sulfur powder was weighed, dissolved in 4mL of oleylamine, and placed in a 50°C water bath to fully dissolve the sulfur powder in oleylamine.

[0047] In the third step, under the conditions of magnetic stirring and argon protection, the precursor solution in the first step is heated to 60°C for 30min, and then the temperature is increased by 60°C→90°C→120°C→150°C→ During the heating process of 170°C, the temperature was raised to 170°C, and after stabilizing for 2 minutes, the S powder dissolved in oleylamine was injected and reacted for 5-90 minutes.

[0048] The fourth step is to take samples when the reaction time is 5min, 10min, 15min, 20min, 30mi...

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Abstract

The invention discloses a preparation method for a doping type four-element multicolor fluorescent Ag-N-In-S quantum dot. The preparation method comprises the following steps: (1) adding AgNO3, InCl3, ZnCl2, oleic acid, dodecyl mercaptan and a solvent--octadecene into a reaction vessel so as to obtain an Ag, In and Zn mixed precursor solution; (2) adding powdered sulfur into oleylamine and carrying out heating to allow the powdered sulfur to be fully dissolved so as to obtain an S precursor solution; (3) heating the Ag, In and Zn mixed precursor solution to a temperature of 50 to 70 DEG C from room temperature and maintaining the temperature for 10 to 30 min under the protection of argon so as to remove air, then heating to a temperature of 150 to 200 DEG C, carrying out stabilization for 1 to 5 min and then injecting the S precursor solution, wherein a mol ratio of In to S is controlled to be 0.125-0.25: 1, and a reaction lasts for 5 to 90 min; (4) taking a sample and dissolving the sample in a hexane solvent so as to obtain an Ag-N-In-S quantum dot solution; and (5) adding absolute ethyl alcohol into the Ag-N-In-S quantum dot solution obtained in step (4) and carrying out centrifugation so as to obtain the Ag-N-In-S quantum dot. The preparation method provided by the invention is simple and convenient, and Ag-N-In-S quantum dots with different emitting colors can be obtained by doping zinc and controlling doping concentration of zinc.

Description

(1) Technical field [0001] The invention relates to a method for preparing doped quaternary quantum dots Ag-Zn-In-S, in particular to a method for preparing Ag-Zn-In-S multicolor fluorescent quantum dots by a one-step thermal injection method. (2) Background technology [0002] Since Mark A. Reed first proposed the concept of quantum dots in 1988, quantum dots, as an emerging nanomaterial, have attracted widespread attention in recent years for their excellent photoelectric properties. Its remarkable size characteristics and shape-dependent effects make it show significant practical and potential applications in optoelectronic fields such as light-emitting devices (such as LEDs), lasers, bioluminescent labels, solar cells, and nonlinear devices. . [0003] Quantum dots (quantum dots) are quasi-zero-dimensional nanoparticles with a radius smaller than or close to the exciton Bohr radius of the bulk material and larger than the lattice spacing, and its size is about 1-20nm. ...

Claims

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Application Information

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IPC IPC(8): C09K11/62
Inventor 向卫东谢翠平梁晓娟骆乐钟家松陈兆平
Owner WENZHOU UNIVERSITY
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