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Preparation method for copper selenide film

A technology of copper selenide and thin film, which is applied in the direction of electrolytic inorganic material coating, etc., can solve the problems of forming solar cells, and achieve the effect of low cost and simple process

Inactive Publication Date: 2015-12-23
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these methods are simple in process, they are all synthesized copper selenide nanoparticles, and the materials synthesized by these methods cannot be used to construct PN junctions by subsequent means to form solar cells.

Method used

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  • Preparation method for copper selenide film
  • Preparation method for copper selenide film
  • Preparation method for copper selenide film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take CuCl 2 0.34g (2.5mM), KCL7.45g (0.1M), SeO 2 Dissolve 0.50g (4.5mM) in one liter of distilled water in turn, use hydrochloric acid to titrate, and keep the pH value of the solution at 1.5 to obtain the electrolyte; add the electrolyte to the electrolytic cell; the ITO glass substrate is used as the working electrode, and the Pt is used as the working electrode. For the counter electrode, a saturated calomel electrode (SCE) was used as a reference electrode, and a water bath was used to maintain the temperature of the reaction system at 90°C. A voltage of -0.10V relative to the reference electrode was applied to the working electrode through an electrochemical workstation, and the reaction time was 30 minutes. A black product is obtained on the working electrode, which is the product copper selenide flake film.

[0025] product appearance see figure 1 The SEM photo, the phase structure see figure 2 The XRD spectrum.

Embodiment 2

[0027] Take CuCl 2 0.34g (2.5mM), KCL7.45g (0.1M), SeO 2 Dissolve 0.50g (4.5mM) in one liter of distilled water in turn, use hydrochloric acid to titrate, and keep the pH value of the solution at 1.5 to obtain the electrolyte; add this electrolyte to the electrolytic cell; FTO glass substrate as the working electrode, Pt as the For the counter electrode, a saturated calomel electrode (SCE) was used as a reference electrode, and a water bath was used to maintain the temperature of the reaction system at 20°C. A voltage of -0.10V relative to the reference electrode was applied to the working electrode through an electrochemical workstation, and the reaction time was 30 minutes. A black product is obtained on the working electrode, which is the product copper selenide flake film.

[0028] product appearance see figure 2 SEM photographs.

Embodiment 3

[0030] Take CuCl 2 0.34g (2.5mM), KCL7.45g (0.1M), SeO 2 Dissolve 0.50g (4.5mM) in one liter of distilled water in turn, use hydrochloric acid to titrate, and keep the pH value of the solution at 1.5 to obtain the electrolyte; add the electrolyte to the electrolytic cell; ATO glass substrate as the working electrode, Pt as the For the counter electrode, a saturated calomel electrode (SCE) was used as a reference electrode, and a water bath was used to maintain the temperature of the reaction system at 90°C. A voltage of -0.15V relative to the reference electrode was applied to the working electrode through an electrochemical workstation, and the reaction time was 30 minutes. A black product is obtained on the working electrode, which is the product copper selenide flake film.

[0031] product appearance see image 3 SEM photographs.

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Abstract

The invention discloses a preparation method for a copper selenide film. The method comprises the following steps that an electrolyte is prepared, wherein a selenium-containing compound of a required amount and a copper-containing compound of a required amount are dissolved into water to obtain an initial solution, titration is performed on the initial solution through a proper amount of an acid solution to obtain the electrolyte with the required PH value; the copper selenide film is prepared, wherein a conducting substrate is used as a working electrode, a three-electrode system is adopted, electrochemical deposition is performed on the electrolyte obtained in the first step, the deposition potential is -0 / 05- -0.5V, and the deposition temperature is 20-90 DEG C. According to the copper selenide film obtained through the electrochemical deposition method, the microgranular structure is evenly distributed in a sheet mode, the obtained copper selenide film can form a PN-junction solar battery structure together with an N-type conductive semiconductor, and the preparation method is simple in technology, low in cost and suitable for industrial production.

Description

technical field [0001] The invention relates to a preparation method of a nano-film, in particular to a preparation method of a copper selenide nano-sheet film. Background technique [0002] Copper selenide has become one of the research hotspots in academia because of its excellent photoelectric properties and is widely used in solar cells and other fields. Copper selenide has a direct bandgap of 2.2eV and an indirect bandgap of 1.0-1.4eV. This bandgap is suitable for absorbing sunlight, so copper selenide is considered to be a good solar cell material. In copper selenide crystals, copper ions form acceptor levels due to the ubiquitous copper atom vacancies in the crystal lattice, so copper selenide has P-type conductivity. Copper selenide can form a PN junction solar cell structure together with an N-type conductive semiconductor. [0003] So far, many people have reported the preparation method of copper selenide. Including sonochemical method, microwave-assisted metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D9/08
Inventor 巩江峰李灵芝张军张开骁唐春梅朱卫华
Owner HOHAI UNIV
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