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Preparation method of Cd-Cu-Fe-Squaternary nanocrystallinewith fluorescence properties

A nanocrystal, cd-cu-fe-s technology, applied in the fields of nanotechnology, nanotechnology, nano-optics, etc. for materials and surface science, which can solve the problems of no optical properties, high synthesis cost, and expensive indium salts , to achieve the effects of good uniformity and stability, mild reaction conditions and low cost

Inactive Publication Date: 2017-07-21
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for the multiple semiconductor nanocrystals of Zn-Cu-In-S, the reserves of the element In in the earth are very scarce, so the indium salt required for the synthesis of the multiple semiconductor nanocrystals is also very expensive, and the synthesis cost is too high, which limits Further development of Zn-Cu-In-S multi-component semiconductor nanocrystals
At present, a cheap multi-component semiconductor nanocrystalline Cu-Fe-S has appeared in people's field of vision, but because it basically has no special optical properties, it does not have much application value in photovoltaics, optoelectronics, etc.

Method used

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  • Preparation method of Cd-Cu-Fe-Squaternary nanocrystallinewith fluorescence properties
  • Preparation method of Cd-Cu-Fe-Squaternary nanocrystallinewith fluorescence properties
  • Preparation method of Cd-Cu-Fe-Squaternary nanocrystallinewith fluorescence properties

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Experimental program
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Effect test

Embodiment 1

[0027] Add 1mmol of cadmium acetate, 1mmol of copper acetate, 0.1mmol of ferrous chloride, 2mL of octadecene and 2mL of oleic acid into a three-neck flask, vacuumize at 100°C for 15 minutes, fill with nitrogen protection, then raise the temperature to 120°C, Inject 1.5 mL of dodecyl mercaptan into the three-necked flask. After the reaction precursor is dissolved and the solution is clear, quickly inject 1.8 mL of 0.5M sulfur-oleylamine solution into the three-necked flask at 120°C to obtain Cd-Cu- Fe-S alloy nanocrystals, the emission peak is at 620nm, and its emission spectrum is shown in figure 1 .

Embodiment 2

[0029] Add 1mmol of cadmium acetate, 1mmol of copper acetate, 0.1mmol of ferrous chloride, 2mL of octadecene and 2mL of oleic acid into a three-neck flask, vacuumize at 100°C for 15 minutes, fill with nitrogen protection, then raise the temperature to 120°C, Inject 1.5mL of dodecyl mercaptan into the three-necked bottle, and then raise the temperature to 150°C. After the reaction precursor is dissolved, the solution is clear, and quickly inject 1.8mL of 0.5M sulfur-oleylamine solution into the three-necked bottle at 150°C. The reaction results in Cd-Cu-Fe-S alloy nanocrystals, the emission peak is at 700nm, and the emission spectrum is shown in figure 2 .

Embodiment 3

[0031] Add 1mmol of cadmium acetate, 1mmol of copper acetate, 0.1mmol of ferrous chloride, 2mL of octadecene and 2mL of oleic acid into a three-neck flask, vacuumize at 100°C for 15 minutes, fill with nitrogen protection, then raise the temperature to 120°C, Inject 1.5mL of dodecyl mercaptan into the three-necked bottle, and then raise the temperature to 230°C. After the reaction precursor is dissolved, the solution is clear, and quickly inject 1.8mL of 0.5M sulfur-oleylamine solution into the three-necked bottle at 230°C. The reaction results in Cd-Cu-Fe-S alloy nanocrystals, the emission peak is at 1100nm, and the emission spectrum is shown in image 3 .

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Abstract

The invention discloses a preparation method of Cd-Cu-Fe-Squaternary nanocrystallinewith fluorescence properties, and belongs to the technical field of semiconductor nanomaterial preparation.The preparation method comprises the following steps: dissolving cadmium acetate, copper acetate and ferrous chloride in a mixed solution of oleic acid and octadecene, vacuumizing and carrying outnitrogenfilling protection at the temperature of 100 DEG C, then heating to the temperature of 120 DEG C, adding dodecyl mercaptan, injecting an oleylamine solution of sulfur into a reaction system at the temperature of 120 to 230 DEG C to obtain the Cd-Cu-Fe-Squaternary nanocrystalline. The Cd-Cu-Fe-Squaternary nanocrystalline disclosed by the invention has low cost and mild and easily reached reaction conditions, componentsare adjustable, synthesized quantum dotshave excellentuniformity and stability, andthe emission rangeis very wide.

Description

technical field [0001] The invention belongs to the technical field of semiconductor nanomaterial preparation, and relates to a method for synthesizing Cd-Cu-Fe-S quaternary alloy nanocrystals with adjustable components. Background technique [0002] When the size of the particle is reduced to a certain critical size (close to the Bohr radius), the fluctuation of the carrier will become significant, and the movement will be restricted, causing the kinetic energy to increase, and the electron energy near the Fermi level of the metal The energy level changes from quasi-continuous to quasi-splitting discontinuous, and at the same time, the distance between the discontinuous highest occupied molecular orbital and the lowest unoccupied molecular orbital energy level becomes wider. This phenomenon is called quantum size effect. The more common semiconductor nanoparticles, that is, quantum dots, mainly include II-VI, III-V and IV-VI groups. Quantum dots have important applications...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/60B82Y20/00B82Y30/00B82Y40/00
CPCB82Y20/00B82Y30/00B82Y40/00C09K11/605
Inventor 解仁国张爽彭路成张颖杨文胜
Owner JILIN UNIV