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Dendritic silver selenide nano crystal thin film material and preparation method

A technology of nanocrystalline materials and thin film materials, applied in nanostructure manufacturing, chemical instruments and methods, nanotechnology, etc., can solve problems such as harsh conditions, high solvent toxicity, complex process, etc., to achieve convenient operation, fast reaction, avoidance of Product impure effect

Inactive Publication Date: 2008-02-13
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

Examples

Experimental program
Comparison scheme
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 whose surface is plated (electrochemically deposited) with a layer of nano-silver film 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 plated 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...

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Abstract

A dendritic silver selenide nano-crystalline thin film material and the preparation method are provided. The making method of the present invention is that a substrate material with a metal silver surface, a simple substance selenium powder and an organic alcohol solvent are put into a reaction kettle of a polytetrafluoroethylene and react at a temperature between 120 DEG C and 180 DEG C. The dendritic silver selenide nano-crystalline thin film material is formed at the original place on the metal silver surface of the substrate material and cools down to the room temperature after the reaction is over. The production is cleaned with a waterless ethanol and dried under the temperature of 50 DEG C. The substrate material is the metal silver foil, of which the surface is plated with a layer of semiconductor silicon wafers of the nano metal silver, a conductive glass ITO and others. The present invention directly produces the silver selenide nano-crystalline thin film at the original place on the substrate of metal silver surface by one-step reaction and takes the simplest organic alcohol as the reaction medium; therefore the environment is moderate. Any additive and surfactant are not used and the subsequent purification step is not needed but the crystalline shape is still perfect. With the quick reaction and the convenient operation, the present invention has a broad industrial application foreground.

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 Applications(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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