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Method for preparing nickel oxide lithium-doped nanocrystals and nickel oxide films by thermal injection

A thermal injection method and nickel oxide technology, which is applied in the direction of nickel oxide/nickel hydroxide, semiconductor devices, electrical components, etc., can solve the problems of optical transparency decline and decline, and achieve product controllability, high quality, and high repeatability Effect

Active Publication Date: 2019-08-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Joshi U S et al. used PLD method to prepare Li-doped NiO thin films, and studied the influence of Li content in the film composition on the photoelectric performance. The results showed that with the increase of Li content, the resistivity of the film decreased from the almost insulator properties to 1.4lQcm, while the optical transparency has decreased

Method used

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  • Method for preparing nickel oxide lithium-doped nanocrystals and nickel oxide films by thermal injection
  • Method for preparing nickel oxide lithium-doped nanocrystals and nickel oxide films by thermal injection
  • Method for preparing nickel oxide lithium-doped nanocrystals and nickel oxide films by thermal injection

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Experimental program
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Effect test

Embodiment 1

[0042] (1) Nickel acetate tetrahydrate alcoholysis reaction and Fourier transform infrared test, the specific process is as follows:

[0043] First, mix 0.2488g of nickel acetate tetrahydrate, 1.082g of stearyl alcohol, and 8ml of octadecene into a three-necked flask, put in a magnet, and heat the reaction solvent to 100°C, 150°C, 200°C, 230°C and 250°C respectively. Samples were taken at ℃ for 5 minutes, and dropped on potassium bromide rock slices for room temperature Fourier infrared testing. In order to further determine the specific conditions of the reaction, the reaction solvent at 250 °C was kept at different times and samples were taken for Fourier infrared testing.

[0044] (2) Lithium acetate dihydrate alcoholysis reaction and Fourier transform infrared test, the specific process is as follows:

[0045] First, mix 0.204g of nickel acetate dihydrate, 1.082g of stearyl alcohol, and 8ml of octadecene into a three-necked flask, put magnets in it, and heat the reaction s...

Embodiment 2

[0050] The thermal injection method of the present embodiment prepares the method for nickel oxide doped with lithium nanocrystals, and the specific process is as follows:

[0051] (1) In a 25ml three-neck flask, add nickel acetate tetrahydrate (Ni(Ac) 2 4H 2 0) 0.2488g, lithium acetate dihydrate (LiAc 2H 2 0) 0.0102g, lithium stearate (LiSt) 0.35g, octadecene (ODE) 8ml as a precursor solution, heated to 260°C under the protection of an inert gas and kept warm;

[0052] (2) Add 1.082 g of octadecyl alcohol (ODA) and 8 ml of octadecene (ODE) to another 25 ml three-necked flask as a reaction solution, and heat it to 240° C. under the protection of an inert gas and keep it warm;

[0053] After 1 hour of heat preservation, the reaction solvent was quickly injected into the container containing the precursor solvent using a syringe. At this time, the temperature of the mixed solvent would drop to about 250°C instantaneously, and the temperature of the mixture was kept for 30 minu...

Embodiment 3

[0064] The thermal injection method of the present embodiment prepares the method for nickel oxide doped with lithium nanocrystals, and the specific process is as follows:

[0065] (1) In a 25ml three-neck flask, add nickel acetate tetrahydrate (Ni(Ac) 2 4H 2 0) 0.2488g, lithium acetate dihydrate (LiAc 2H 2 0) 0.0255g, lithium stearate (LiSt) 0.35g, octadecene (ODE) 8ml as a precursor solution, heated to 260°C under the protection of an inert gas and kept warm;

[0066] (2) Add 1.082 g of octadecyl alcohol (ODA) and 8 ml of octadecene (ODE) to another 25 ml three-necked flask as a reaction solution, and heat it to 240° C. under the protection of an inert gas and keep it warm; after 1 hour of insulation, Rapidly inject the reaction solvent into the container containing the precursor solvent with a syringe, at this time, the temperature of the mixed solvent will drop to about 250°C instantaneously, and keep it warm for 30 minutes to obtain a nickel oxide nanocrystal solution. ...

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Abstract

The invention discloses a method for preparing nickel oxide lithium-doped nanocrystalline through a thermal injection method. The method comprises the following steps: (1) heating a mixed solution ofa precursor and doped elements; (2) heating a reaction solvent, and injecting the mixed solution in step (1) into the reaction solvent to obtain a nickel oxide nanocrystalline solution after heat preservation at reaction temperature; and (3) purifying the nickel oxide nanocrystalline solution obtained in step (2) to obtain nickel oxide nanocrystalline. The invention further discloses a method forpreparing nickel oxide film through the thermal injection method; a complex system is not needed, a reaction solution only needs to be injected into a proper concentration of the solution of the precursor and the doped elements at proper temperature, and purified nanocrystalline can be obtained after extraction and centrifugation, a transparent conducting film can be obtained after spin coating, heat treatment and ozone treatment, the operation is simple, the cost is low, and the repeatability is high.

Description

technical field [0001] The invention relates to the preparation of p-type nickel oxide-doped lithium nanocrystals, in particular to a method for preparing nickel oxide-doped lithium nanocrystals and nickel oxide films by thermal injection. Background technique [0002] Since the 1907 reference Badeker K. Concerning the electricity conductivity and the thermoelectric energy of several heavy metal bonds [J]. Ann Phys-berlin, 1907, 22 (4): 749-766. After first reporting the transparent conductive CdO film, people began to There is great interest in transparent conductive oxide (Transparent copd::cting oxide, TCO). In recent decades, the material system and preparation technology of TCO thin films have been vigorously developed. Transparent conductive oxides mainly refer to wide-bandgap metal binary or multiple oxide semiconductors with high transmittance in the visible light region and low resistivity. In general, transparent substances in nature (such as glass, crystal, etc....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/04C03C17/23H01L31/0224
Inventor 李东升胡梦迪杨德仁
Owner ZHEJIANG UNIV
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