Method for preparing copper antimony sulfide solar cell light-absorbing layer film

A technology for solar cells and light absorbing layers, which is applied in circuits, electrical components, and final product manufacturing, etc., can solve the problems of poor crystallinity, easy introduction of impurities, low resistance, etc., and achieve the effect of good crystallinity

Inactive Publication Date: 2016-03-09
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, most reports in the literature use chemical methods to prepare copper-antimony-sulfur light-absorbing layers. Although this method reduces the manufacturing cost compared with vacuum methods, there are several main problems: First, chemical methods need to use organic solvents or water solvents, and the solutes are mostly various. It is a salt compound of constituent elements, so it is easy to introduce impurities, and semiconductor materials are extremely sensitive to the content of impurities, and a very small amount of impurities may greatly reduce its electrical properties
In copper antimony sulfur, the evaporation temperature of copper and antimony is very different, especially the evaporation temperature of

Method used

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  • Method for preparing copper antimony sulfide solar cell light-absorbing layer film
  • Method for preparing copper antimony sulfide solar cell light-absorbing layer film

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Embodiment 1

[0022] Embodiment 1: copper antimony sulfur (CuSbS 2 ) film preparation

[0023] 1. Fix the molybdenum-coated glass substrate on the substrate of the multi-source thermal evaporation coating system, close the cavity, and use a mechanical pump and a molecular pump to pump the background vacuum inside the cavity to 5×10 -4 Pa, start the beam source furnace heater, and make sure the beam source furnace damper is closed.

[0024] 2. Raise the temperature of the copper, antimony and sulfur beam source furnaces to 1100-1200°C, 500-600°C and 100-200°C respectively, and keep them constant.

[0025] 3. The substrate heater starts to heat up from room temperature, and rises to 200-300°C in 3-8 minutes and keeps it constant. At this time, open the baffle of the antimony and sulfur beam source furnace to start the first stage of evaporation, and evaporate the molybdenum-coated glass substrate For antimony and sulfur, the first stage of evaporation ends after 10-15 minutes; the second st...

Embodiment 2

[0027] With copper antimony sulfur (CuSbS) of the present invention 2 ) film to prepare solar cells, the structure of which is as image 3 As shown, the specific process of the preparation method is as follows:

[0028] 1. Plating a molybdenum back electrode layer with a thickness of 600 nanometers on the soda-lime glass by DC magnetron sputtering;

[0029] 2. Preparation of 1.2 μm thick copper antimony sulfur (CuSbS) on molybdenum-coated glass by three-step co-evaporation 2 ) thin film light absorbing layer;

[0030] 3. Prepare a cadmium sulfide buffer layer with a thickness of 50 nanometers by chemical bath method;

[0031] 4. Prepare a 100 nm thick intrinsic zinc oxide layer by magnetron sputtering;

[0032] 5. Prepare a 500-nanometer thick indium tin oxide transparent conductive window layer by magnetron sputtering;

[0033] 6. Preparation of silver electrodes by thermal evaporation.

[0034] The SEM photo of the section of the copper antimony sulfur thin film solar ce...

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Abstract

The present invention discloses a method for preparing a copper antimony sulfide solar cell light-absorbing layer film. Light-absorbing layer copper antimony sulfide is prepared by stree-step multi-source co-evaporation deposition process, the anti-evaporation of antimony sulfide is effectively compensated, a film composition is precisely controlled, the crystallinity of the film is improved, film bottom is in antimony, the film adhesion is enhanced, a surface layer is rich in antimony, the generation of a surface layer rich copper phase is inhibited, and the leakage current of a solar cell is reduced. Compared with a chemical method, the method of the invention has the advantages that the crystallinity and component controllability of the copper antimony sulfide is improved, the miscellaneous phase formation is suppressed, the carrier recombination of a space charge region is reduced, and the improvement of cell efficiency is facilitated.

Description

1. Technical field [0001] The invention relates to a method for preparing a solar cell light-absorbing layer film, in particular to a method for preparing a copper-antimony-sulfur solar cell light-absorbing layer film. 2. Background technology [0002] Copper antimony sulfur (CuSbS 2 ) is similar to the traditional high-efficiency thin-film solar cell absorber copper indium gallium selenide, which also has the advantages of high light absorption coefficient and band gap matching with the solar spectrum. Compared with copper indium gallium selenide, its element antimony is cheaper than indium and gallium. In addition, its crystallization temperature is much lower than that of copper indium gallium selenide, so the cost of raw materials and production is greatly reduced, and it is considered to be the most promising new generation of solar cells. [0003] The copper antimony sulfur light absorbing layer is the core layer of the battery. At present, most reports in the litera...

Claims

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Application Information

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IPC IPC(8): H01L21/02H01L31/18
CPCH01L21/02422H01L21/02568H01L21/02631H01L31/18Y02P70/50
Inventor 万磊胡可马程徐进章
Owner HEFEI UNIV OF TECH
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