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Solar cell absorption layer and preparation method and application thereof

A technology for solar cells and absorbing layers, applied in the field of solar cells, can solve problems such as uneven film composition, difficult-to-sulfur antimony selenide film, and poor crystallinity of the film, and achieve easy control of film composition and thickness, and simple preparation equipment and processes , The uniformity of the film is good

Active Publication Date: 2019-11-29
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vacuum method has high requirements on equipment, and the obtained film composition may be uneven
The traditional solution method is simple to operate, but the crystallinity of the film is poor, and most of them need subsequent selenization, it is difficult to prepare antimony sulfur selenide film in one step, and the process is complicated

Method used

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  • Solar cell absorption layer and preparation method and application thereof
  • Solar cell absorption layer and preparation method and application thereof
  • Solar cell absorption layer and preparation method and application thereof

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preparation example Construction

[0032] The invention provides a method for preparing a solar cell absorbing layer, comprising the following steps:

[0033] A) mixing antimony potassium tartrate, sodium thiosulfate and sodium selenosulfate with water to obtain a deposition solution;

[0034] B) the deposition solution is subjected to a hydrothermal reaction on the surface of the substrate to obtain an antimony sulfoselenide film compounded on the surface of the substrate;

[0035] C) performing annealing treatment on the obtained antimony sulfur selenide thin film in an inert gas environment to obtain a solar cell absorbing layer.

[0036] The present invention firstly prepares a deposition solution, specifically, dissolving antimony potassium tartrate and sodium thiosulfate in water to obtain a mixed solution;

[0037] An aqueous solution of sodium selenosulfate is added to the mixed solution to obtain a deposition solution required for depositing an antimony sulfur selenide film.

[0038] The aqueous solu...

Embodiment 1

[0064] 1) Clean the FTO conductive glass substrate: clean the substrate with ultrapure water, ethanol, isopropanol, and acetone in sequence for 15 minutes ultrasonically, and then clean it with oxygen plasma for 15 minutes. Deposit a CdS thin film on a clean substrate.

[0065] 2) Place the substrate obliquely in the hydrothermal reactor. Preparation of deposition solution: take a 50mL beaker, first add 40mL deionized water, then add 0.2671g antimony potassium tartrate, stir until dissolved with a stirring bar. Then add 0.7936 g of sodium thiosulfate, stir for 60 s, then add 100 μL of 0.1 M sodium selenosulfate solution, and continue stirring for 120 s to obtain a deposition solution. At this time, the concentration of antimony potassium tartrate in the deposition solution is 0.02M, the concentration of sodium thiosulfate is 0.08M, and the concentration of sodium selenosulfate is 0.00025M.

[0066] 3) Pour the deposition liquid obtained in step 2) into a hydrothermal reactio...

Embodiment 2

[0070] 1) Clean the FTO conductive glass substrate: clean the substrate with ultrapure water, ethanol, isopropanol, and acetone in sequence for 15 minutes ultrasonically, and then clean it with oxygen plasma for 15 minutes. Deposit a CdS thin film on a clean substrate.

[0071] 2) Place the substrate obliquely in the hydrothermal reactor. Preparation of deposition solution: take a 50mL beaker, first add 40mL deionized water, then add 0.2671g antimony potassium tartrate, stir until dissolved with a stirring bar. Then add 0.7936 g of sodium thiosulfate, stir for 60 s, then add 200 μL of 0.1 M sodium selenosulfate solution, and continue stirring for 120 s to obtain a deposition solution. At this time, the concentration of antimony potassium tartrate in the deposition solution is 0.02M, the concentration of sodium thiosulfate is 0.08M, and the concentration of sodium selenosulfate is 0.0005M.

[0072] 3) Pour the deposition liquid obtained in step 2) into a hydrothermal reaction...

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Abstract

The invention provides a preparation method of a solar cell absorption layer. The preparation method comprises the following steps: A) potassium antimony tartrate, sodium thiosulfate and sodium selenosulfate are mixed with water to obtain a deposition solution; B) the deposition liquid is subjected to hydrothermal reaction on the surface of a substrate to obtain an antimony sulfide selenide film composite on the surface of the substrate; C) the obtained antimony sulfide selenide film is annealed under an inert gas environment so as to obtain the solar cell absorption layer. According to the preparation method, the antimony sulfide selenide film is directly deposited by the hydrothermal method without subsequent selenization, thus solving the problem that the solution method mostly requiressubsequent selenization. The band gap of the film can be conveniently adjusted by changing the concentration of the odium thiosulfate and the sodium selenosulfate in the deposition solution so as toobtain the antimony sulfide selenide film with adjustable band gap. Compared with other methods, the preparation equipment and process are simple, the crystallinity of the film is good, the composition and the thickness of the film are easy to control and the uniformity of the film is good.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a solar cell absorbing layer and a preparation method and application thereof. Background technique [0002] As a class of inorganic light-absorbing materials, the application of antimony sulfoselenide in solar cells has attracted more and more attention. The elements contained in this kind of material are very rich in storage, non-toxic, and have a large absorption coefficient (≈10 5 cm -1 ) and a suitable optical bandgap (1.03-1.8eV). Most importantly, the compound has good water and oxygen stability. Since antimony sulfide and antimony selenide have the same crystal structure, the bandgap of the material can be flexibly adjusted by adjusting the ratio of the two elements of sulfur and selenium, thereby obtaining a light-absorbing material with an ideal optical bandgap. Therefore, this type of material has great application prospects. [0003] At present, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/032H01L31/0392H01L31/0445H01L31/18
CPCH01L31/032H01L31/0392H01L31/18H01L31/186H01L31/0445Y02E10/50Y02P70/50
Inventor 高迪陈涛朱长飞江国顺
Owner UNIV OF SCI & TECH OF CHINA
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