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Thin film solar cell and method of forming same

A technology of solar cells and solar cells, which is applied in the field of solar cells and can solve problems such as damage to the structure of thin films

Active Publication Date: 2018-02-23
TAIWAN SEMICON MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, some commonly used processes for thin film deposition result in damage to the thin film substructure

Method used

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  • Thin film solar cell and method of forming same
  • Thin film solar cell and method of forming same
  • Thin film solar cell and method of forming same

Examples

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[0049] In one example, a solar cell device can be fabricated according to the methods described herein. Glass substrates can be provided and cleaned. A back contact layer of Mo can be deposited on the front side of the substrate, and a P1 line can be scribed through the back contact layer. A CIGS absorber layer may be formed over the back contact layer, including filling the P1 scribe lines. A protective layer of PET adhesive tape can be applied on the rear side of the substrate. A protective layer can be placed over the backside of the substrate and a blade can be used to smooth and compress the protective layer, holding the protective layer in place on the substrate.

[0050] The substructure with the attached protective layer can be dipped into a CBD bath containing a solution of water, ammonia, cadmium sulfate, thiourea to form a CdS buffer layer around the substructure including on the absorber layer and on the back side of the glass substrate . The substructure can b...

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PUM

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Abstract

The invention describes a solar cell device and its manufacturing method. The solar cell is produced by forming a back contact layer on the front side of the substrate, forming an absorber layer on the back contact layer, applying a protective layer on the back side of the substrate, and depositing a buffer layer on the absorber layer. Excess buffer material is deposited on the backside of the substrate, and the protective layer with the excess buffer material is removed.

Description

technical field [0001] The present invention generally relates to the field of solar cells, and more particularly, to thin-film solar cells and methods of forming the same. Background technique [0002] The present disclosure relates to the fabrication of thin film photovoltaic solar cells. [0003] A solar cell is an electronic device used to generate electrical current from sunlight through the photovoltaic (PV) effect. Thin film solar cells have one or more layers of thin films of PV material deposited on a substrate. The film thickness of the PV material can be on the nanometer or micrometer scale. [0004] Examples of thin film PV materials used as absorber layers in solar cells include copper indium gallium selenide (CIGS) and cadmium telluride. The absorber layer absorbs light for conversion into electrical current. The solar cell also includes front and back contact layers to aid in light harvesting and photocurrent extraction and to provide electrical contacts t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18H01L31/0296H01L31/073H01L31/0216H01L31/032H01L31/0445H01L31/06H01L31/0749
CPCH01L31/0322H01L31/073H01L31/0749H01L31/186H01L31/0445Y02E10/541Y02E10/543Y02P70/50H01L31/18H01L31/0296H01L31/02167H01L31/06
Inventor 陈世伟
Owner TAIWAN SEMICON MFG CO LTD