Dendritic silver selenide nano crystal thin film material and preparation method

A thin film material, silver selenide technology, applied in nanostructure manufacturing, chemical instruments and methods, nanotechnology and other directions, can solve the problems of harsh conditions, high solvent toxicity, complex process, etc., to achieve convenient operation, fast reaction, avoidance of Product impure effect

Inactive Publication Date: 2009-09-30
XUCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem to be solved by the present invention is: to overcome the shortcomings such as high solvent toxicity, impure product, complex process and harsh conditions in the current method for preparing silver selenide crystals

Method used

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  • Dendritic silver selenide nano crystal thin film material and preparation method
  • Dendritic silver selenide nano crystal thin film material and preparation method
  • Dendritic silver selenide nano crystal thin film material and preparation method

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Experimental program
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Effect test

Embodiment 1

[0021] (1) Preparation: Put the analytically pure metallic silver foil into a beaker filled with deionized water, clean it with an ultrasonic cleaner for 0.5 hours, and then soak it in absolute ethanol for use. Wash the polytetrafluoroethylene container successively with tap water, distilled water, and absolute ethanol, and dry it for use.

[0022] (2) Reaction steps: put the processed metal silver foil into the polytetrafluoroethylene container, add methanol solvent to the height of 80% of the container and add selenium powder at the same time, the concentration of selenium powder is 0.0007 g / ml, polytetrafluoroethylene The vinyl fluoride container was placed in a stainless steel jacket and placed in a muffle furnace with a temperature-programmed function. The temperature increase rate was 2°C / min, and the temperature was raised to 160°C for 12 hours.

[0023] (3) Post-processing: After the reaction, turn off the power supply of the muffle furnace and let it cool down to room...

Embodiment 2

[0025] (1) preparatory work: with embodiment 1

[0026] (2) Reaction steps: put the processed metal silver foil into the polytetrafluoroethylene container, add dodecyl alcohol solvent to the height of 80% of the container and add selenium powder simultaneously, the concentration of selenium powder is 0.0014 g / ml, and The polytetrafluoroethylene container was placed in a stainless steel jacket and placed in a muffle furnace with a temperature-programmed function, and the temperature was raised to 180°C, and the reaction was carried out for 6 hours at a heating rate of 10°C / min.

[0027] (3) Post-processing: After the reaction, turn off the power supply of the muffle furnace and let it cool down to room temperature naturally. Wash the product twice with absolute ethanol, put it into a vacuum drying oven and dry it at 50°C for 4 hours to obtain a silver selenide thin film sample, then carefully transfer it into a sample bottle, and store it in a dark and dry environment. The col...

Embodiment 3

[0029] (1) Preparatory work: the freshly prepared semiconductor silicon wafer coated with a layer of nano-silver film on the surface (electrochemical deposition) is used as a reaction substrate, and put into a vacuum drying oven for standby. Wash the polytetrafluoroethylene container successively with tap water, distilled water, and absolute ethanol, and dry it for use.

[0030] (2) Reaction steps: the semiconductor silicon chip that the surface is coated with one deck nanometer silver film is put into polytetrafluoroethylene container, adds ethanol solvent to the height of 80% of container and adds selenium powder simultaneously, and selenium powder concentration is 0.0007 gram / Put the polytetrafluoroethylene container into a stainless steel jacket and place it in a bench-top drying oven with a temperature-programmed function, raise the temperature to 140°C and react for 3 hours, with a heating rate of 5°C / min.

[0031] (3) Post-treatment: After the reaction, turn off the po...

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Abstract

A dendritic silver selenide nanocrystalline film material and a preparation method thereof. The preparation method of this material is to place the base material with metallic silver surface, elemental selenium powder, and organic alcohol solvent together in a polytetrafluoroethylene reaction kettle, react at 120°C-180°C, and the metallic silver surface of the base material A thin film material composed of silver selenide nanocrystals with a dendritic structure is prepared in situ. After the reaction is completed, it is naturally cooled to room temperature, and the product is washed with absolute ethanol and dried below 50°C. The base material refers to metal silver foil, a semiconductor silicon chip coated with a layer of nano-metal silver on the surface, conductive glass ITO, etc.; the present invention directly grows selenium in situ on the substrate with a metal silver surface through a one-step chemical reaction. Silver nanocrystalline film, using the simplest organic alcohol as the reaction medium, is environmentally friendly; no additives and surfactants are used, no subsequent purification steps are required and the crystal form is perfect; the reaction is fast, the operation is convenient, and it has a wide range of industrial applications prospect.

Description

Technical field: [0001] The invention belongs to the technical field of material chemistry, and in particular relates to a chemical method for preparing a dendritic silver selenide nanocrystal film material. Background technique: [0002] Silver Selenide (Ag 2 Se) crystal, is a kind of A I 2 B VI Type semiconductor materials have attracted the attention of researchers for many years due to their unique electrical and optical properties. At present, this material has been widely used in many fields such as solar cells, fuel cells, solid electrochemical sensors, magnetic sensor devices and optical filters, and has broad application prospects. Silver selenide crystals have a high-temperature phase (α-Ag 2 Se) and low temperature phase (β-Ag 2 Se) two phases, the transition temperature between the two phases is 133 degrees Celsius. α-Ag with body centered cubic structure 2 Se is an ionic conductor material, which is widely used in the photoelectric secondary battery indu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/02C01G5/00B82B3/00
Inventor 郑直李大鹏水正阳龙明强黄保军赵红晓杨风岭张礼之
Owner XUCHANG UNIV
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