Preparation method of flexible CuInS2 solar battery based on thin copper substrate

Abstract

The invention relates to a preparation method of a flexible CuInS2 solar battery based on a thin copper substrate. The preparation method comprises the steps of weighing copper salt and trihydric indium salt, dissolving the copper salt and trihydric indium salt into ethylene glycol for preparing the ethylene glycol solution of the copper indium salt; adding thioacetamide solid into ethylene glycol for ultrasonic dissolving, then adding the ethylene glycol solution of the copper indium salt to obtain mixed solution, and then transferring the mixed solution to a hydro-thermal reaction kettle and adding a copper sheet, after reaction, taking a copper sheet with herringbone CuInS2 out for being washed by distilled water and alcohol sequentially to obtain a flexible CuInS2 sheet, and then conducting centrifugal separation; and preparing a cadmium sulfide buffer layer on the flexible CuInS2 sheet in the chemical bath deposition method, and then conducting magnetron sputtering on zinc oxide and indium tin oxide, thus obtaining the flexible CuInS2 solar battery. The preparation method is simple in process and lower in equipment requirement; the solar battery is based on the flexible ultrathin substrate and has a certain flexibility and wide application prospect.

Description

technical field

[0001] The invention belongs to the field of preparation of solar photovoltaic cells, in particular to a flexible CuInS based on a thin copper sheet substrate 2 Method for preparing solar cells. Background technique

[0002] Facing the severe energy situation and the deterioration of the ecological environment, changing the existing energy structure and developing sustainable green energy has become a topic of great concern to all countries in the world. Solar energy is considered to be the most promising new green energy because of its advantages such as no risk of depletion, high energy quality, and no geographical restrictions. According to statistics, although the energy radiated by the sun to the earth's atmosphere is only 1 / 2.2 billion of its total radiated energy, it is as high as 173,000TW. As long as 20 minutes of solar energy can be fully absorbed, it is enough to power the world for a whole year. Therefore, the development of high-efficiency, ch...

Examples

Embodiment 1

[0032] (1) Preparation of copper indium sulfur thin film material: weigh 0.25mmol CuSO 4 ·5H 2 O, 0.25mmol InCl 3 4H 2 O, dissolved in 15mL of ethylene glycol to obtain an ethylene glycol solution of copper indium salt; weigh 2mmol of thioacetamide, dissolve it in 10mL of ethylene glycol, dissolve it ultrasonically, and then add the above copper indium salt under stirring The ethylene glycol solution was transferred to a hydrothermal reaction kettle, a copper sheet was added, and the reaction was carried out at 160° C. for 18 hours. After the reaction, the CuInS 2 The copper piece was taken out and rinsed successively with distilled water and ethanol.

[0033](2) chemical bath deposition cadmium sulfide buffer layer: the 25wt% ammoniacal liquor of cadmium sulfate, thiourea, appropriate volume is made into solution, makes it alkaline, and makes the concentration of cadmium ion be controlled at 10 -3 ~10 -2 M, the concentration of sulfide ion is at 10 -2 ~10 -1 M, adjust...

Embodiment 2

[0035] (1) Preparation of Copper Indium Sulfur Film Material: A, put into 20% (quality) hydrochloric acid after polishing the ultra-thin flexible copper sheet surface of 2cm * 2cm with sandpaper and soak for 1 hour to remove the oxide on the copper sheet surface, use Wash the surface twice with deionized water, then ultrasonically wash the copper sheet in acetone for 10 minutes to remove organic matter on the surface, and dry it for later use. B. Weigh 0.5mmol CuSO 4 ·5H 2 O, 0.5mmol InCl 3 4H 2 O, placed in a conical flask, add 15mL of ethylene glycol, stir, and dissolve each substance. C. Weigh 3mmol of thioacetamide, dissolve it in 20mL of ethylene glycol, and ultrasonically dissolve it. Pour C into B under stirring conditions, continue to stir for half an hour, transfer to a hydrothermal reaction kettle, add the copper sheet treated in A, and react at 200°C for 24 hours. After the reaction, fishbone-like CuInS will grow 2 The copper piece was taken out and rinsed suc...

Embodiment 3

[0038] (1) Preparation of copper indium sulfur thin film material: A, put into 20% (quality) hydrochloric acid after polishing the surface of the ultra-thin flexible copper sheet of 2cm * 2cm with sandpaper and soak for 2 minutes to remove the oxide on the surface, use deionized Wash the surface with water for 3 times, then ultrasonically wash the copper sheet in ethanol for 20 minutes to remove the organic matter on the surface, and dry it for later use. B. Weigh 1mmol copper nitrate, 1mmol indium sulfate InCl 3 4H 2 O, placed in a conical flask, add 4mL of ethylene glycol, stir, and dissolve each substance. C. Weigh 2 mmol of thioacetamide, dissolve it in 10 mL of ethylene glycol, and ultrasonically dissolve it. Pour C into B under stirring conditions, continue to stir for half an hour, transfer to a hydrothermal reaction kettle, add the copper sheet treated in A, and react at 220°C for 24 hours. After the reaction, fishbone-like CuInS will grow 2 The copper piece was ta...

technical field

[0001] The invention belongs to the field of preparation of solar photovoltaic cells, in particular to a flexible CuInS based on a thin copper sheet substrate 2 Method for preparing solar cells. Background technique

[0002] Facing the severe energy situation and the deterioration of the ecological environment, changing the existing energy structure and developing sustainable green energy has become a topic of great concern to all countries in the world. Solar energy is considered to be the most promising new green energy because of its advantages such as no risk of depletion, high energy quality, and no geographical restrictions. According to statistics, although the energy radiated by the sun to the earth's atmosphere is only 1 / 2.2 billion of its total radiated energy, it is as high as 173,000TW. As long as 20 minutes of solar energy can be fully absorbed, it is enough to power the world for a whole year. Therefore, the development of high-efficiency, ch...

Examples

Embodiment 1

[0032] (1) Preparation of copper indium sulfur thin film material: weigh 0.25mmol CuSO 4 ·5H 2 O, 0.25mmol InCl 3 4H 2 O, dissolved in 15mL of ethylene glycol to obtain an ethylene glycol solution of copper indium salt; weigh 2mmol of thioacetamide, dissolve it in 10mL of ethylene glycol, dissolve it ultrasonically, and then add the above copper indium salt under stirring The ethylene glycol solution was transferred to a hydrothermal reaction kettle, a copper sheet was added, and the reaction was carried out at 160° C. for 18 hours. After the reaction, the CuInS 2 The copper piece was taken out and rinsed successively with distilled water and ethanol.

[0033](2) chemical bath deposition cadmium sulfide buffer layer: the 25wt% ammoniacal liquor of cadmium sulfate, thiourea, appropriate volume is made into solution, makes it alkaline, and makes the concentration of cadmium ion be controlled at 10 -3 ~10 -2 M, the concentration of sulfide ion is at 10 -2 ~10 -1 M, adjust...

Embodiment 2

[0035] (1) Preparation of Copper Indium Sulfur Film Material: A, put into 20% (quality) hydrochloric acid after polishing the ultra-thin flexible copper sheet surface of 2cm * 2cm with sandpaper and soak for 1 hour to remove the oxide on the copper sheet surface, use Wash the surface twice with deionized water, then ultrasonically wash the copper sheet in acetone for 10 minutes to remove organic matter on the surface, and dry it for later use. B. Weigh 0.5mmol CuSO 4 ·5H 2 O, 0.5mmol InCl 3 4H 2 O, placed in a conical flask, add 15mL of ethylene glycol, stir, and dissolve each substance. C. Weigh 3mmol of thioacetamide, dissolve it in 20mL of ethylene glycol, and ultrasonically dissolve it. Pour C into B under stirring conditions, continue to stir for half an hour, transfer to a hydrothermal reaction kettle, add the copper sheet treated in A, and react at 200°C for 24 hours. After the reaction, fishbone-like CuInS will grow 2 The copper piece was taken out and rinsed suc...

Embodiment 3

[0038] (1) Preparation of copper indium sulfur thin film material: A, put into 20% (quality) hydrochloric acid after polishing the surface of the ultra-thin flexible copper sheet of 2cm * 2cm with sandpaper and soak for 2 minutes to remove the oxide on the surface, use deionized Wash the surface with water for 3 times, then ultrasonically wash the copper sheet in ethanol for 20 minutes to remove the organic matter on the surface, and dry it for later use. B. Weigh 1mmol copper nitrate, 1mmol indium sulfate InCl 3 4H 2 O, placed in a conical flask, add 4mL of ethylene glycol, stir, and dissolve each substance. C. Weigh 2 mmol of thioacetamide, dissolve it in 10 mL of ethylene glycol, and ultrasonically dissolve it. Pour C into B under stirring conditions, continue to stir for half an hour, transfer to a hydrothermal reaction kettle, add the copper sheet treated in A, and react at 220°C for 24 hours. After the reaction, fishbone-like CuInS will grow 2 The copper piece was ta...

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