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A kind of monodisperse blue chalcocite semiconductor nanocrystal and preparation method thereof

A blue chalcocite, semiconductor technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as complex operation, and achieve the effect of safe and simple operation, cheap and easy-to-obtain raw materials

Active Publication Date: 2015-09-02
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, regarding bluechalcocite (Cu 9 S 5 ) Synthesis methods of semiconductor nanocrystals are seldom reported
In the few literatures available, Cu 9 S 5 The synthesis method of semiconductor nanocrystals is relatively complicated, requires multi-step reactions, and requires the preparation of metal precursors in advance, etc.

Method used

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  • A kind of monodisperse blue chalcocite semiconductor nanocrystal and preparation method thereof
  • A kind of monodisperse blue chalcocite semiconductor nanocrystal and preparation method thereof
  • A kind of monodisperse blue chalcocite semiconductor nanocrystal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 15 milliliters of octadecene and 5 milliliters of dodecanethiol in a 50 milliliter round-bottomed flask, then add 4.5 millimoles of copper acetylacetonate and 0.75 millimoles of zinc acetylacetonate, purify nitrogen for 15 minutes, and then react The solution was slowly heated to 240°C, and reacted for 120 minutes under magnetic stirring. After the reaction was completed, it was naturally cooled to room temperature, and ethanol was added to the reaction solution for precipitation. After aging and centrifugation, the obtained sample was vacuum-dried at 70°C. After 6 hours, the final product was obtained.

[0026] figure 1 It is the blue chalcocite (Cu 9 S 5 ) X-ray powder diffraction pattern of nanocrystals, which proves that the prepared product is chalcopyrite structure with rhombic lattice (JCPDS47-1748), and the crystal form is better; figure 2 It is the blue chalcocite (Cu 9 S 5 ) The transmission electron micrograph of the nanocrystal, which proves that t...

Embodiment 2

[0028] Add 15 milliliters of octadecene and 5 milliliters of dodecanethiol in a 50 milliliter round bottom flask, then add 4.5 millimoles of copper acetylacetonate and 0.5 millimoles of cadmium acetate, and all the other operations are the same as in Example 1.

[0029] Figure 4 and Figure 5 Respectively the blue chalcocite (Cu 9 S 5 ) X-ray powder diffraction patterns and transmission electron microscope photographs of the nanocrystals, indicating that the crystal structure is good, does not contain other impurities, and the prepared blue chalcocite nanocrystals are uniform spherical nanocrystals.

Embodiment 3

[0031] Add 15 milliliters of octadecene and 5 milliliters of dodecanethiol in a 50 milliliter round bottom flask, then add 4.5 millimoles of copper acetylacetonate and 0.5 millimoles of aluminum acetylacetonate, all the other operations are the same as in Example 1.

[0032] Figure 6 For the prepared blue chalcocite (Cu 9 S 5 ) X-ray powder diffraction pattern of nanocrystals, the sample is a rhombic chalcopyrite structure with good crystallinity.

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Abstract

The invention discloses a monodisperse Cu9S5 semiconductor nanocrystal and a preparation method thereof and belongs to the technique field of emiconductor nanocrystal synthesis. In the invention, copper salt is taken as a copper raw material, a small amount of other metal salt is doped, and aliphatic series mercaptan is taken as a sulphur raw material, and in a high-boiling-point solvent, a pyrolysis method is adopted to prepare a Cu9S5 semiconductor nanocrystal with good monodispersity. According to the invention, the raw materials are low in price and easily available, the experiment and process are simple, the operation is safe, simple and convenient and the repeatability is good. The Cu9S5 semiconductor nanocrystal prepared by the preparation method in the invention has a diameter less than 5 nanometers, the shape is spherical or rice-shaped, and the crystal form is a rhombohedral system or tetragonal system.

Description

technical field [0001] The invention belongs to the technical field of semiconductor nanocrystal synthesis, and in particular relates to a monodisperse blue chalcocite (Cu chalcocite) with a uniform appearance. 9 S 5 ) semiconductor nanocrystal and preparation method thereof. Background technique [0002] In the past ten years, semiconductor colloidal nanocrystals have attracted widespread attention from domestic and foreign scientists in basic research and applied research, such as the A.P. Alivisatos research group at the University of California, Berkeley, M.G.Bawendi at the Massachusetts Institute of Technology The research group and Li Yadong's research group at Tsinghua University in China have achieved outstanding research work in the synthesis and application of semiconductor nanocrystals. However, most of the research work is concentrated on the synthesis, optical properties, optoelectronic devices and biomarkers of semiconductor nanocrystals such as CdSe, CdS, Pb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G3/12B82Y40/00B82Y30/00
Inventor 唐爱伟叶海航
Owner BEIJING JIAOTONG UNIV
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