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Method for controlling content of sodium in CIGS film, solar cell, and structure

A technology of solar cells and sodium content, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems affecting cell efficiency and stability, and achieve the effect of promoting growth

Inactive Publication Date: 2015-10-21
APOLLO PRECISION (FUJIAN) LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The presence of a small amount of sodium ions is conducive to the growth of CIGS grains and high-efficiency battery devices. However, excessive sodium ions will form defect states inside the material, which greatly affects battery efficiency and stability.

Method used

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  • Method for controlling content of sodium in CIGS film, solar cell, and structure
  • Method for controlling content of sodium in CIGS film, solar cell, and structure

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Embodiment Construction

[0035] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar promotions without violating the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0036] The present application provides a method for controlling sodium content in CIGS thin films, a structure for CIGS thin film solar cells and a CIGS thin film solar cell. The embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0037] Please refer to figure 1 , which is a flow chart of an embodiment of a method for controlling the sodium content in a CIGS thin film provided by the present application, the method for controlling the sodium content in th...

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Abstract

The invention provides a method for controlling the content of sodium in a CIGS film, and the method comprises the steps: firstly forming a sodion blocking layer on a substrate containing sodium, and blocking the sodion in the substrate from being diffused into the CIGS film; secondly forming a controllable sodium source layer on the sodion blocking layer, and providing sodion with a controllable content from the CIGS film through the control of the thickness of the controllable sodium source layer. The above method enables uncontrollable sodion in the substrate to be isolated, blocks the uncontrollable sodion from being diffused into the CIGS film, provides the controllable sodium source layer, and precisely controls the content of sodion in the CIGS film through the diffusion of the sodion in the controllable sodium source layer, thereby prompting the growth of CIGS crystalline grain, and obtaining a high-efficiency CIGS film solar cell.

Description

technical field [0001] The invention relates to the technical field of copper indium gallium selenide (CIGS) thin film solar cells, in particular to a method for controlling sodium content in CIGS thin films, a structure for CIGS thin film solar cells and a CIGS thin film solar cell. Background technique [0002] CIGS thin-film solar cell is a chalcopyrite crystal thin-film solar cell with the best ratio of Cu (copper), In (indium), Ga (gallium), and Se (selenium), which has strong light absorption ability and stable power generation. It has many advantages such as good performance, high conversion efficiency, low production cost and short energy recovery cycle. As a light-absorbing layer material, CIGS thin films directly affect the performance of CIGS solar cell devices, especially CIGS thin films grown on soda-lime glass substrates. [0003] Studies have shown that in the manufacture and use of CIGS solar cells, a large number of sodium ions in the soda-lime glass substr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18H01L31/0749
CPCH01L31/0749H01L31/18Y02E10/541Y02P70/50
Inventor 田晶詹姆斯·黄徐希翔李建清何静婧王溢欢
Owner APOLLO PRECISION (FUJIAN) LIMITED