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Chemical method for preparing three-dimensional dendritic copper selenide nano-crystalline photoelectric film material

A technology for optoelectronic thin films and thin film materials, applied in the field of material chemistry, can solve the problems of harsh conditions, high solvent toxicity, impure products, etc., and achieve high coverage, convenient operation, good light absorption and photoluminescence performance.

Inactive Publication Date: 2010-01-27
XUCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overcome the shortcomings of the current method for preparing copper selenide crystals, such as high solvent toxicity, impure products, complicated processes, and harsh conditions

Method used

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  • Chemical method for preparing three-dimensional dendritic copper selenide nano-crystalline photoelectric film material
  • Chemical method for preparing three-dimensional dendritic copper selenide nano-crystalline photoelectric film material
  • Chemical method for preparing three-dimensional dendritic copper selenide nano-crystalline photoelectric film material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation: Put the analytically pure metal copper sheet into a beaker filled with dilute hydrochloric acid solution (concentrated hydrochloric acid and deionized water, volume ratio 1:20), clean it with an ultrasonic cleaner for 0.5 hours, and then soak it in absolute ethanol ready for use. Wash the polytetrafluoroethylene container successively with tap water, distilled water, and absolute ethanol, and dry it for use.

[0031] (2) Reaction steps: put the processed metal copper sheet into the polytetrafluoroethylene container, add n-hexanol solvent to the height of 80% of the container and add selenium powder simultaneously, the selenium powder concentration is 0.0007 g / ml, polytetrafluoroethylene The vinyl fluoride container was placed in a stainless steel jacket and placed in an oven with a temperature-programmed function at a rate of 2°C / min, and the temperature was raised to 190°C for 3 hours.

[0032] (3) Post-treatment: after the reaction, turn off the powe...

Embodiment 2

[0034] (1) preparatory work: with embodiment 1.

[0035] (2) Reaction steps: put the processed metal copper sheet into the polytetrafluoroethylene container, add cyclohexanol solvent to the height of 80% of the container and add selenium powder simultaneously, the selenium powder concentration is 0.0007 g / ml, polytetrafluoroethylene The tetrafluoroethylene container was placed in a stainless steel jacket and placed in an oven with a temperature-programmed function at a rate of 2°C / min, and the temperature was raised to 190°C for 3 hours.

[0036] (3) Post-treatment: after the reaction, turn off the power of the oven and cool down to room temperature naturally. Wash the product with absolute ethanol for 5 times, put it into a vacuum drying oven and dry at 50°C for 5 hours to obtain a copper selenide film sample, and then carefully transfer it to a sample bottle and store it in a dark and dry environment. The color of the product is dark black, and the microstructure under the ...

Embodiment 3

[0038] (1) preparatory work: with embodiment 1.

[0039] (2) Reaction steps: put the processed metal copper sheet into the polytetrafluoroethylene container, add dehydrated alcohol solvent to the height of 80% of the container and add selenium powder simultaneously, the concentration of selenium powder is 0.0007 g / ml, polytetrafluoroethylene The tetrafluoroethylene container was placed in a stainless steel jacket and placed in an oven with a temperature-programmed function, and the temperature was raised to 200° C., and the reaction was carried out for 1 hour, and the heating rate was 2° C. / min.

[0040] (3) Post-treatment: after the reaction, turn off the power of the oven and cool down to room temperature naturally. Wash the product twice with absolute ethanol and put it into a vacuum drying oven at 50°C to dry for 4 hours to obtain a copper selenide film sample, then carefully transfer it to a sample bottle and store it in a dark and dry environment. The color of the produ...

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Abstract

The invention relates to a chemical method for preparing three-dimensional dendritic copper selenide nano-crystalline photoelectric film material. The preparation method of the material includes that sheet copper or base material provided with metallic copper surface, simple substance selenium powder and organic alcohol solvent are all placed into a tetrafluoroethylene kettle, direct reaction is carried out for 1-3 hours at the temperature of 190 DEG C or above, and photoelectric film material composed of copper selenium nano-crystalline in three-dimensional dendritic structure is prepared on the metallic copper surface in situ. The film material shows better photoabsorption and photoluminescence performances. After reaction is finished, the kettle is naturally cooled to room temperature, and final product is washed by absolute alcohol and dried below 50 DEG C. The base material provided with metallic copper surface is a sheet copper and conductive glass ITO with metallic copper plated on surface. The invention uses organic alcohol solvent as reaction medium, thus being environmentally friendly; no additive or surfactant is adopted, following purifying step is not required while crystal form is perfect; and reaction is rapid, operation is convenient, and cost is greatly reduced.

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 three-dimensional polydendron copper selenide nanocrystal photoelectric thin film material. Background technique: [0002] Dendrite is a special crystal with novel appearance and unique properties. For metal chalcogenides with dendrite morphology, many literatures have reported the special properties of their special morphology in semiconductor photoelectric transmission. Taking semiconductor nanocrystal / conjugated polymer heterojunction photovoltaic cells (Hybrid Solar Cells) as an example, the electron transport capability in the photovoltaic cell system is the main factor that determines the performance of the device. The study found that multi-branched nano-CdSe crystals are tried to be used as electron acceptors because they can stretch in three-dimensional space and are conducive to the formation of electron channel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0272C30B29/46C01B19/04
Inventor 郑直李大鹏黄家伟黄保军张翼东赵红晓杨风岭张礼之
Owner XUCHANG UNIV
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