Method for synthesizing copper indium diselenide quantum dot

Abstract

The invention provides a method for synthesizing a copper indium diselenide quantum dot. The CuInSe2 quantum dot is prepared through a two-step reaction by using copper iodide or copper acetylacetonate as a copper source, indium acetate or indium 2,4-pentanedionate as an indium source and oleylamine as ligand and solvent. The CuInSe2 quantum dot has a size of 4-10nm, has a tetragonal phase structure by XRD crystal phase analysis, has excellent photoelectric performance, and is suitable for preparing quantum dot sensitized solar cells. Compared with a hot injection method, the method has the advantages of simple and easy operation, simpler process, shorter synthesizing cycle, good production controllability and repeatability and low cost, is suitable for industrial production, and has a wide application prospect in solar cells.

Description

technical field

[0001] The invention belongs to the field of photovoltaic materials, in particular to a copper indium selenide (CuInSe) 2 ) Synthetic method of quantum dots. Background technique

[0002] The lack of traditional energy and the pollution it brings make people pay attention to energy issues. Clean and renewable solar energy is the main energy source to solve human energy problems. Direct conversion of solar energy into electrical energy is one of the most direct and effective ways to utilize solar energy. Research in the traditional field of photovoltaics mainly focuses on silicon-based solar cells. With decades of development, crystalline silicon solar cells have the advantages of high photoelectric conversion efficiency and stability, but because they are based on the demand for a large number of silicon crystal materials, As a result, the cost is relatively high, and it cannot effectively compete with fossil energy, which has become a bottleneck restricti...

Examples

Embodiment 1

[0046] Weigh 0.1111mg (1.0mmol) of selenium dioxide and put it into a round bottom flask, add 3ml of oleylamine to it, put it in a constant temperature oil bath at 100°C for 6 minutes, and after cooling to room temperature, add 19.0mg (0.1mmol) of cuprous iodide to it , 58.4mg (0.2mmol) of indium acetate, the reaction vessel was placed in a 210°C constant temperature oil bath for 20 minutes, and then cooled to room temperature; the solution after the reaction was centrifuged, and the supernatant was discarded and washed with n-hexane. Centrifuge, discard the precipitate again, add ethanol to the supernatant to wash and centrifuge, repeat the washing and centrifugation several times until the supernatant after centrifugation is colorless and transparent, and take the final precipitate as the final product.

[0047] Product composition, structure and morphology characterization:

[0048] The final product is dissolved in dichloromethane, and after the dichloromethane volatilizes...

Embodiment 2

[0063] Weigh 0.1111mg (1.0mmol) of selenium dioxide and put it into a round bottom flask, add 3ml of oleylamine to it, put it in a constant temperature oil bath at 100°C for 6 minutes, and after cooling to room temperature, add 26.2mg (0.1mmol) of copper acetylacetonate, 82.4mg (0.2mmol) of indium acetylacetonate, the reaction vessel was placed in a 210°C constant temperature oil bath for 20 minutes, and then cooled to room temperature; the solution after the reaction was centrifuged, and the supernatant was discarded and washed with n-hexane. Centrifuge, discard the precipitate again, add ethanol to the supernatant to wash and centrifuge, repeat the washing and centrifugation several times until the supernatant after centrifugation is colorless and transparent, and take the final precipitate as the final product.

[0064] Product composition, structure and morphology characterization:

[0065] The final product is dissolved in dichloromethane, and after the dichloromethane vo...

Embodiment 3

[0073] Weigh 0.1111mg (1.0mmol) of selenium dioxide and put it into a round bottom flask, add 3ml of oleylamine to it, put it in a constant temperature oil bath at 100°C for 6 minutes, and after cooling to room temperature, add 19.0mg (0.1mmol) of cuprous iodide to it , 82.4mg (0.2mmol) indium acetylacetonate, put the reaction vessel in a constant temperature oil bath at 210°C for 20 minutes, then cool to room temperature; centrifuge the reacted solution, discard the precipitate and wash the supernatant with n-hexane And centrifugal separation, after discarding the precipitate again, add ethanol to the supernatant to wash and centrifuge, repeat the washing and centrifugation several times until the supernatant after centrifugation is colorless and transparent, take the final precipitate as the final product obtained .

[0074] The final product is dissolved in dichloromethane, and after the dichloromethane volatilizes, the product is subjected to XRD measurement, and the X-ray...

technical field

[0001] The invention belongs to the field of photovoltaic materials, in particular to a copper indium selenide (CuInSe) 2 ) Synthetic method of quantum dots. Background technique

[0002] The lack of traditional energy and the pollution it brings make people pay attention to energy issues. Clean and renewable solar energy is the main energy source to solve human energy problems. Direct conversion of solar energy into electrical energy is one of the most direct and effective ways to utilize solar energy. Research in the traditional field of photovoltaics mainly focuses on silicon-based solar cells. With decades of development, crystalline silicon solar cells have the advantages of high photoelectric conversion efficiency and stability, but because they are based on the demand for a large number of silicon crystal materials, As a result, the cost is relatively high, and it cannot effectively compete with fossil energy, which has become a bottleneck restricti...

Examples

Embodiment 1

[0046] Weigh 0.1111mg (1.0mmol) of selenium dioxide and put it into a round bottom flask, add 3ml of oleylamine to it, put it in a constant temperature oil bath at 100°C for 6 minutes, and after cooling to room temperature, add 19.0mg (0.1mmol) of cuprous iodide to it , 58.4mg (0.2mmol) of indium acetate, the reaction vessel was placed in a 210°C constant temperature oil bath for 20 minutes, and then cooled to room temperature; the solution after the reaction was centrifuged, and the supernatant was discarded and washed with n-hexane. Centrifuge, discard the precipitate again, add ethanol to the supernatant to wash and centrifuge, repeat the washing and centrifugation several times until the supernatant after centrifugation is colorless and transparent, and take the final precipitate as the final product.

[0047] Product composition, structure and morphology characterization:

[0048] The final product is dissolved in dichloromethane, and after the dichloromethane volatilizes...

Embodiment 2

[0063] Weigh 0.1111mg (1.0mmol) of selenium dioxide and put it into a round bottom flask, add 3ml of oleylamine to it, put it in a constant temperature oil bath at 100°C for 6 minutes, and after cooling to room temperature, add 26.2mg (0.1mmol) of copper acetylacetonate, 82.4mg (0.2mmol) of indium acetylacetonate, the reaction vessel was placed in a 210°C constant temperature oil bath for 20 minutes, and then cooled to room temperature; the solution after the reaction was centrifuged, and the supernatant was discarded and washed with n-hexane. Centrifuge, discard the precipitate again, add ethanol to the supernatant to wash and centrifuge, repeat the washing and centrifugation several times until the supernatant after centrifugation is colorless and transparent, and take the final precipitate as the final product.

[0064] Product composition, structure and morphology characterization:

[0065] The final product is dissolved in dichloromethane, and after the dichloromethane vo...

Embodiment 3

[0073] Weigh 0.1111mg (1.0mmol) of selenium dioxide and put it into a round bottom flask, add 3ml of oleylamine to it, put it in a constant temperature oil bath at 100°C for 6 minutes, and after cooling to room temperature, add 19.0mg (0.1mmol) of cuprous iodide to it , 82.4mg (0.2mmol) indium acetylacetonate, put the reaction vessel in a constant temperature oil bath at 210°C for 20 minutes, then cool to room temperature; centrifuge the reacted solution, discard the precipitate and wash the supernatant with n-hexane And centrifugal separation, after discarding the precipitate again, add ethanol to the supernatant to wash and centrifuge, repeat the washing and centrifugation several times until the supernatant after centrifugation is colorless and transparent, take the final precipitate as the final product obtained .

[0074] The final product is dissolved in dichloromethane, and after the dichloromethane volatilizes, the product is subjected to XRD measurement, and the X-ray...

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