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Method for preparing cuprous oxide thin film

A cuprous oxide and thin film technology is applied in the field of electrochemical material preparation, which can solve the problems of large particle size, unclear film phase composition and morphology, and electrolyte containing toxic components, so as to achieve simple operation and improve photoelectric conversion efficiency. , easy-to-control effects

Active Publication Date: 2014-12-24
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Cu 2 The preparation of O thin film materials still faces many problems and difficulties, Cu 2 The effect of phase composition and morphology of O film is not very clear, the prepared Cu 2 Larger O particle size (micron order)
Chinese patent CN1556250 adopts the electrolysis of metal copper anode in the electrolyte solution containing acetonitrile and tetrahydrofuran to generate cuprous oxide, and the prepared cuprous oxide is calcined under nitrogen protection at 400-600 °C. The electrolyte solution in this method contains toxic components and requires High temperature treatment, not suitable for industrial production and application performance requirements of solar cells

Method used

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  • Method for preparing cuprous oxide thin film
  • Method for preparing cuprous oxide thin film
  • Method for preparing cuprous oxide thin film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Take a metal copper sheet with a size of 40mm×50mm×1mm, first use detergent to clean the oil stain on the surface, and then use 0.05mol / L sodium hydroxide aqueous solution and 0.05mol / L hydrochloric acid aqueous solution successively under ultrasonic conditions Ultrasonic immersion until the surface of the copper sheet is clean (about 5 to 10 minutes), then ultrasonic cleaning with absolute ethanol, and finally rinse with deionized water;

[0027] 2. At room temperature, use the copper sheet cleaned in step 1 as the anode, the platinum sheet as the cathode, and the 0.3mol / L sodium hydroxide aqueous solution as the electrolyte, under the electrolysis conditions of a DC voltage of 9V and a DC current of 0.7A Carry out the electrolysis reaction for 2 minutes, and stir the electrolytic solution at a rate of 300 rpm at the same time;

[0028] 3. At room temperature, use the copper sheet obtained in step 2 as the anode, the platinum sheet as the cathode, and the 0.03mol / L ...

Embodiment 2

[0034] 1. Take a metal copper sheet with a size of 40mm×50mm×1mm, first use detergent to clean the oil stain on the surface, and then use 0.05mol / L sodium hydroxide aqueous solution and 0.05mol / L hydrochloric acid aqueous solution successively under ultrasonic conditions Ultrasonic immersion until the surface of the copper sheet is clean (about 5 to 10 minutes), then ultrasonic cleaning with absolute ethanol, and finally rinse with deionized water;

[0035] 2. At room temperature, use the copper sheet cleaned in step 1 as the anode, the platinum sheet as the cathode, and the 0.1mol / L sodium hydroxide aqueous solution as the electrolyte, under the electrolysis conditions of a DC voltage of 8V and a DC current of 0.5A Carry out the electrolysis reaction for 3 minutes, and stir the electrolytic solution at a rate of 200 rpm at the same time;

[0036] 3. At room temperature, use the copper sheet obtained in step 2 as the anode, the platinum sheet as the cathode, and the 0.05mol / L ...

Embodiment 3

[0040]1. Take a metal copper sheet with a size of 40mm×50mm×1mm, first use detergent to clean the oil stain on the surface, and then use 0.05mol / L sodium hydroxide aqueous solution and 0.05mol / L hydrochloric acid aqueous solution successively under ultrasonic conditions Ultrasonic immersion until the surface of the copper sheet is clean (about 5 to 10 minutes), then ultrasonic cleaning with absolute ethanol, and finally rinse with deionized water;

[0041] 2. At room temperature, use the copper sheet cleaned in step 1 as the anode, the platinum sheet as the cathode, and the 0.5mol / L sodium hydroxide aqueous solution as the electrolyte, under the electrolysis conditions of a DC voltage of 10V and a DC current of 1.0A Carry out the electrolysis reaction for 1min, and stir the electrolytic solution at a rate of 400rpm at the same time;

[0042] 3. At room temperature, use the copper sheet obtained in step 2 as the anode, the platinum sheet as the cathode, and the 0.01mol / L sodium...

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Abstract

The invention discloses a method for preparing a cuprous oxide thin film. The method includes the following steps of using a cleaned copper sheet as an anode, a platinum sheet as a cathode, and a 0.1-0.5mol / L sodium hydroxide aqueous solution as an electrolyte, and performing electrolysis reaction for 1-3 minutes under electrolysis conditions of 8-10V of direct current voltage and 0.5-1.0A of direct current; using a 0.01-0.05mol / L sodium hydroxide aqueous solution as an electrolyte, and performing electrolysis reaction for 40-120 minutes under electrolysis conditions of 2-5V of direct current voltage and 0.01-0.05A of direct current; finally, performing annealing. The method is simple in operation, easy to control, applicable to large-area production, and capable of achieving controllable growth of a structure and thickness of the cuprous oxide thin film, the prepared cuprous oxide thin film has a nanocrystalline structure with a crystalline grain size of 100-150nm, and improvement of photoelectricity converting efficiency of solar cells is facilitated.

Description

technical field [0001] The invention relates to a method for preparing a cuprous oxide thin film, and belongs to the technical field of electrochemical material preparation. Background technique [0002] Cuprous oxide (Cu 2 O) is a cuprite structure, which belongs to the cubic structure, and the lattice constant is 0.463nm. It is a direct bandgap semiconductor material with a forbidden band width of about 2.1eV, the acceptor energy level is 0.4eV above the valence band, and the donor energy level is 1.1-1.3eV lower than the conduction band. Visible light excitation. Although its photoelectric performance is not easy to control, it has many advantages, such as non-toxicity, low cost, high photoelectric theoretical conversion rate, and high absorption efficiency for visible light. polycrystalline Cu 2 The stability of O is very good, and it is difficult to be reduced to simple Cu or oxidized to divalent Cu. It has become a semiconductor material with great potential and ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/34
Inventor 方亚林言智孙明轩王莹邓卫之
Owner SHANGHAI UNIV OF ENG SCI
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