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Membrane permeation solar cell diffusion process

A solar cell and diffusion process technology, applied in the direction of circuits, electrical components, sustainable manufacturing/processing, etc., can solve problems such as difficult conventional battery promotion, complex solar cell manufacturing, etc., and achieve the effects of easy implementation, less pollution, and simple methods

Active Publication Date: 2010-12-29
TRINA SOLAR CO LTD
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  • Claims
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Problems solved by technology

However, these methods are too complicated for solar cell manufacturing and can only be applied in laboratories or small-scale production, which is difficult to promote in the industrial production of conventional cells.

Method used

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  • Membrane permeation solar cell diffusion process
  • Membrane permeation solar cell diffusion process
  • Membrane permeation solar cell diffusion process

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Embodiment Construction

[0012] Such as figure 1 with 2 As shown, a film permeation solar cell diffusion process, firstly, the phosphorus slurry 4 is selectively printed on the surface of the coated crystalline silicon wafer 1 at a certain interval, the coated film is a phosphorus permeable film layer 5, and then the phosphorus slurry 4 is dried , Diffusion, dephosphorous silicon glass.

[0013] The solar cell production process using the above membrane permeation solar cell diffusion process is as follows:

[0014] First, the surface of the silicon wafer 1 is cleaned and textured, and then a layer of phosphorus permeable film layer 5 is coated on the surface of the silicon wafer 1; the phosphorous slurry 4 is printed on the surface of the silicon wafer 1 like an electrode grid, and then the phosphorous slurry is dried 4. Then put the silicon wafer 1 into the diffusion furnace for diffusion, the plated phosphorus permeable film layer 5 will not prevent the phosphorus in the phosphor slurry 4 from di...

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Abstract

The invention relates to the fabrication method of a crystal silicon solar battery, in particular to the diffusion process used by a membrane permeation solar battery. The process comprises the following steps: selectively printing phosphorous paste on the surface of a coated crystal silicon sheet at a certain interval; drying the paste; diffusing the silicon sheet; and removing phosphorosilicateglass. According to the method, the selective emitter structure of the solar battery can be conveniently fabricated, and has the advantages of simple steps, easy implementation, less pollution and industrial production.

Description

technical field [0001] The invention relates to a production method of a crystalline silicon solar cell, in particular to a film permeation solar cell diffusion process. Background technique [0002] Crystalline silicon solar cells occupy more than 90% of the photovoltaic market. How to further improve efficiency and reduce costs is the basic goal of the research field of crystalline silicon solar cells at home and abroad. [0003] Realizing selective emitter structure on silicon wafer is one of the methods to realize high efficiency of p-n crystalline silicon solar cells. The so-called selective emitter structure has two characteristics: 1) a highly doped deep diffusion region is formed under and near the electrode gate line; 2) a low doped shallow diffusion region is formed in other regions. The key to realizing the selective emitter structure is how to form the two regions mentioned above. There are many ways to realize the selective emission region, the most common one...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18
CPCY02P70/50
Inventor 汪钉崇
Owner TRINA SOLAR CO LTD
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