Method for manufacturing high-efficiency silicon solar cell sheet

A silicon solar cell, high-efficiency technology, applied in the direction of final product manufacturing, sustainable manufacturing/processing, circuits, etc., can solve the problems of difficult processing, high production cost, low efficiency, etc.

Inactive Publication Date: 2008-10-08
JIANGSU TIANBAO PV ENERGY
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  • Abstract
  • Description
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Problems solved by technology

This method is difficult to process, inefficient and high in production cost

Method used

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  • Method for manufacturing high-efficiency silicon solar cell sheet

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Experimental program
Comparison scheme
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Embodiment Construction

[0016] 1. Preparation of oxide phosphorus source or silicon dioxide phosphorus latex source:

[0017] The oxide phosphorus source is modulated by glass powder and ammonium dihydrogen phosphate.

[0018] The silicon dioxide phosphorus latex source is prepared from ethyl orthosilicate and phosphorus pentoxide.

[0019] 2. Specific operation steps:

[0020] 1. Remove the damaged layer on the surface of the P-type silicon wafer by chemical etching, texturing and chemical cleaning according to the conventional method.

[0021] Although the silicon wafer has been cleaned after cutting, there are still grease, metal and other impurities and dirt on the surface. In addition, there is a layer of damaged layer on the surface of the silicon wafer after cutting. The above-mentioned impurities will have a certain impact on the subsequent processes and the performance of the battery. These can be processed through cleaning, damage removal and texturing.

[0022] Texturing is the use of l...

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Abstract

The invention provides a method for preparing highly effective silicon solar cell sheet, which includes: directly printing or spraying oxide phosphorus source or silicon dioxide phosphorus latex source on a P-type silicon sheet; directly forming a concentrated phosphorus diffusion region pattern used as concentrated phosphorus diffusion source; diffusing in phosphorus oxychloride ambience to a transverse N+N high and low junction for one time; etching periphery, removing phosphorus silicon glass, depositing silicon nitride film, silk screen printing front back electrode and back aluminum, passivating by hydrogen and sintering. The method only needs one time diffusion to form a N+N high and low homojunction and dose not need growing silicon dioxide to screen and forming a concentrated and thin phosphorus twice diffusion region by twice photoetching, so that a plurality of working procedures such as oxidization, photoetching and twice diffusion can be saved, conversion efficiency is increased.

Description

technical field [0001] The invention relates to a process method for manufacturing high-efficiency silicon solar cells. Background technique [0002] The research work on the manufacture of high-efficiency silicon solar cells based on the theoretical basis of "purple batteries" has been carried out for more than ten years, but it still stays in the theoretical guidance and has not really been applied to commercial production. The fundamental reason is that the manufacturing process is restricted by the original traditional process concept. To achieve the goal of high conversion efficiency, it is necessary to add multiple processes, which will lead to a series of increases in production costs. Researching a compromise and simple process method to reduce the recombination of surface photogenerated carriers has become the goal that everyone pursues. [0003] On the basis of the "purple battery", if you continue to reduce the junction depth or change its surface doping concentr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18
CPCY02P70/50
Inventor 李志贤
Owner JIANGSU TIANBAO PV ENERGY
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