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Electrochemical deposition method for preparing cadmium telluride thin film solar cell cadmium telluride absorber layer

A technology for solar cells and deposition methods, which is applied in the field of electrochemical deposition of cadmium telluride absorbing layers in the preparation of cadmium telluride thin-film solar cells, and can solve the problems of affecting the conversion efficiency of solar cells and small effective area

Active Publication Date: 2017-01-04
北京恒昀动力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technical solution eliminates the adhesion between CdTe and the thimble contact electrode, so that no CdTe compound is attached to the removed thimble electrode, thus solving the problem of the unit of solar cells in the existing electrochemical deposition method for producing solar cells. The effective area involved in photoelectric conversion is small, which affects the conversion efficiency of solar cells

Method used

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Embodiment 1

[0019] The invention discloses an electrochemical deposition method for preparing a cadmium telluride absorbing layer of a cadmium telluride thin-film solar battery, wherein the deposition process of the CdTe absorbing layer is intermittent deposition. When the CdTe film is deposited in a thickness of 0.01-0.5um, stop energizing the contact electrode, and leave the contact electrode away from the surface to be electrodeposited for at least 1 second, then electrically connect the contact electrode to the surface to be electrodeposited again and energize, and conduct CdTe deposition again , repeat the above process until the CdTe film reaches the required thickness.

Embodiment 2

[0021] The invention discloses an electrochemical deposition method for preparing a cadmium telluride absorbing layer of a cadmium telluride thin-film solar battery, wherein the deposition process of the CdTe absorbing layer is intermittent deposition. When the CdTe film is deposited in a thickness of 0.01-0.5um, stop energizing the contact electrode, rotate the contact electrode at least one turn, and then electrically connect the contact electrode to the surface to be electrodeposited and energize again, and then deposit CdTe again. Repeat the above process until the CdTe film layer to the desired thickness.

Embodiment 3

[0023] The invention discloses an electrochemical deposition method for preparing a cadmium telluride absorbing layer of a cadmium telluride thin-film solar battery, wherein the deposition process of the CdTe absorbing layer is intermittent deposition. When the CdTe film is deposited in a thickness of 0.01-0.5um, stop energizing the contact electrode, leave the contact electrode away from the surface to be electrodeposited for at least 1 second, and then electrically connect the contact electrode to the surface to be electrodeposited again and energize it again for CdTe deposition , while depositing, change the direction of electrolyte flow until the CdTe film reaches the required thickness.

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Abstract

The invention belongs to the field of thin film solar cells, and particularly relates to an electrochemical deposition method for manufacturing a CdTe thin film solar cell CdTe absorption layer. According to the technical scheme of the invention, the CdTe absorption layer deposition process is intermittent-type deposition; the adhesive force between CdTe and an ejection pin contact electrode is eliminated; not any CdTe compound is adhesive to the removed ejection pin electrode; and thus the problem that in the prior solar cell production device in an electrochemical deposition method and the method, as the effective area participating in photoelectric conversion in the unit area in the solar cell is small, the conversion efficiency of the solar cell is influenced is solved.

Description

technical field [0001] The invention belongs to the field of thin-film solar cells, and in particular relates to an electrochemical deposition method for preparing a cadmium telluride absorbing layer of a cadmium telluride thin-film solar cell. Background technique [0002] Cadmium telluride (CdTe) thin film solar cell is a thin film solar cell based on the heterojunction of p-type CdTe and n-type CdS. In recent years, CdTe thin-film solar cells have attracted much attention at home and abroad for their advantages such as high photoelectric conversion rate, low production cost, high stability, wide absorption spectrum, and recyclability after the end of life cycle. [0003] CdTe thin film solar cells are photovoltaic devices formed by depositing multiple layers of thin films sequentially on glass or other flexible substrates. A general standard CdTe thin film solar cell consists of five layers, where the direction of the arrow is the direction of light. [0004] The first ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18C23C16/44
CPCH01L31/0296H01L31/1828Y02E10/543Y02P70/50
Inventor 张征宇李伟中
Owner 北京恒昀动力科技有限公司
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