Chemical method for in situ synthesis of platy silver sulphide nano crystal photoelectric film at low temperature

A technology of silver sulfide and nanocrystals, applied in the field of material chemistry, can solve the problems of high toxicity of solvents, impure products, complex processes, etc., and achieve the effect of convenient operation, high purity and high purity

Inactive Publication Date: 2010-07-28
XUCHANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The problem to be solved by the present invention is: to overcome the current preparation of Ag 2 In the method of S crystal, there are disadvantages such as dependence on reaction vessel and surfactant, high energy consumption, high toxicity of solvent, impure product, complicated process, etc.

Method used

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  • Chemical method for in situ synthesis of platy silver sulphide nano crystal photoelectric film at low temperature
  • Chemical method for in situ synthesis of platy silver sulphide nano crystal photoelectric film at low temperature
  • Chemical method for in situ synthesis of platy silver sulphide nano crystal photoelectric film at low temperature

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Experimental program
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Embodiment 1

[0039] 1. Preparation: Flatten the analytical pure silver sheet (2cm in length, 0.3cm in width, and 0.2mm in thickness) and place it in absolute ethanol, wash it with an ultrasonic cleaner for 3 minutes, then soak it in absolute ethanol for use; The polytetrafluoroethylene reaction kettle (volume 20ml) was washed successively with tap water, distilled water and absolute ethanol, and dried for later use;

[0040] 2. Reaction steps: Weigh 0.01g of sulfur powder and put it in the polytetrafluoroethylene reactor (volume 20ml) treated in step 1, fill with 15ml of absolute ethanol, put the treated silver foil into the polytetrafluoroethylene In the ethylene reactor, avoid direct contact with sulfur powder! Place the polytetrafluoroethylene reactor in a stable place and react at 20°C for 64 hours;

[0041] 3. Post-treatment: After the reaction, wash the product with absolute ethanol for 3 times, and then dry it at room temperature until there is no ethanol residue on the surface of ...

Embodiment 2

[0043] 1, preparatory work: with embodiment 1.

[0044] 2. Reaction steps: Weigh 0.01g of sulfur powder and put it in the polytetrafluoroethylene reactor (volume 20ml) treated in step 1, fill with 15ml of absolute ethanol, put the treated silver foil into the polytetrafluoroethylene In the ethylene reactor, avoid direct contact with sulfur powder! Place the polytetrafluoroethylene reactor in a stable place and react at 20°C for 184 hours;

[0045] 3, aftertreatment: with embodiment 1. The color of the product is black, and the microstructure under the scanning electron microscope is planar regular pentagonal flaky nanocrystals. Scanning electron micrographs see figure 2 .

Embodiment 3

[0047] 1. Preparation: Flatten the analytical pure silver sheet (1cm in length, 0.3cm in width, and 0.2mm in thickness) and place it in absolute ethanol, wash it with an ultrasonic cleaner for 3 minutes, then soak it in absolute ethanol for use; The polytetrafluoroethylene reaction kettle (volume 20ml) was washed successively with tap water, distilled water and absolute ethanol, and dried for later use;

[0048] 2. Reaction steps: Weigh 0.01g of sulfur powder and put it in the polytetrafluoroethylene reactor (volume 20ml) treated in step 1, fill with 15ml of absolute ethanol, and place the treated metal silver foil horizontally at the bottom of the reactor , Avoid direct contact with sulfur powder! Place the reactor in a stable place and react at 60°C for 4 hours;

[0049] 3, aftertreatment: with embodiment 1. The color of the product is black, and the microstructure under the scanning electron microscope is flaky nanocrystals. Scanning electron micrographs see image 3 . ...

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Abstract

The invention relates to a chemical method for in situ synthesis of platy silver sulphide nano crystal photoelectric film at low temperature. The method includes that firstly sulphur powder is added into a container, and then organic solvent is added, volume of organic solvent is more than 1/2 of volume of the container, and finally base material with clean metal silver surface is placed at the bottom of the container in inclining or horizontal way, thus avoiding direct contact with sulphur powder. The base material and sulphur powder are immersed under solvent liquid level and react for 4-184 hours at the temperature of 20-60 DEG C, concentration of simple substance sulphur powder in reactant is maintained to be saturate, namely film material composed of platy silver sulphide nano crystal is prepared on the surface of the base material with clean metal silver surface by in situ, and product is washed by absolute ethyl alcohol and dried at room temperature. The method for preparing base material with clean metal silver surface includes that base material with metal silver surface is placed into absolute alcohol, is cleaned by an ultrasonic cleaner for 3min and then is soaked in DMF or absolute alcohol for spare use. The invention can be carried out at low temperature, has low energy consumption and is convenient and efficient, thus being beneficial to industrialized production.

Description

technical field [0001] The invention belongs to the technical field of material chemistry, and particularly relates to a chemical method for in-situ synthesis of a large-area photoelectric thin film composed of sheet-like silver sulfide nanocrystals at low temperature. Background technique [0002] Silver sulfide (Ag 2 S) is a narrow bandgap direct semiconductor with good chemical stability and outstanding optical limiting properties. Its limiting optical properties are shown as response at a wavelength of 532nm under the action of nanosecond laser pulses, and its value is far beyond that of fullerene C 60 and aluminum phthalocyanine chloride. Ag 2 S crystals are widely used in the manufacture of various optical and electronic devices, such as photovoltaic cells, photoconductors, infrared IR detectors, and superionic conductors. In a recent study, it was discovered that Ag 2 S can also be used as a solid state memory device for electrical experimental research. Ag 2 S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G5/00B82B3/00H01L31/032
Inventor 郑直李大鹏雷岩贾会敏法文君李品将赵红晓杨风岭
Owner XUCHANG UNIV
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