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Solar battery manufacturing method

A technology for solar cells and manufacturing methods, which is applied in the direction of final product manufacturing, sustainable manufacturing/processing, circuits, etc., can solve the problems of low utilization rate of epitaxial wafers, waste of edges and corners, etc., to increase the production process flow, improve the utilization rate, The effect of increasing production costs

Inactive Publication Date: 2014-07-16
SHANGHAI INST OF SPACE POWER SOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The problem solved by the invention is the low utilization rate of epitaxial wafers and the waste of a large number of corners existing in the production of solar cells

Method used

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  • Solar battery manufacturing method
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Embodiment 1

[0038] Such as figure 2 Shown is a schematic structural diagram of a solar cell formed in an embodiment of the present invention. According to the method for manufacturing solar cells by utilizing the corner regions of epitaxial wafers provided by the present invention, grid lines and electrodes are manufactured in the sub-cell regions, and small-sized solar cells of triangular, trapezoidal or other shapes are manufactured by dicing.

[0039] specifically, figure 2 The shown solar cell size of the main solar cell region is 30mm×40mm solar cell or 40mm×60mm solar cell, which forms four secondary solar cell regions 4 by using the corner regions.

Embodiment 2

[0041] Such as image 3 Shown is a schematic structural view of a solar cell formed in another embodiment of the present invention. According to the method for manufacturing solar cells by utilizing the corner regions of epitaxial wafers provided by the present invention, grid lines and electrodes are manufactured in the sub-cell regions, and small-sized solar cells of triangular, trapezoidal or other shapes are manufactured by dicing.

[0042] specifically, image 3 The solar cell size of the shown main solar cell area is 40mm×80mm or 80mm×80mm solar cell, which forms four secondary solar cell areas 4 by using the corner areas.

[0043] In summary, the solar cells involved in the present invention are manufactured from the corners of the epitaxial wafers. By using the method of using the corners of the epitaxial wafers, the utilization rate of the epitaxial wafers can be improved without increasing the process flow and production of solar cells. cost, achieving cost reducti...

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Abstract

The invention provides a solar battery manufacturing method. The method comprises the steps of providing an epitaxial wafer comprising a main solar battery area and a corner area located outside the main solar battery area, and forming an auxiliary solar battery area on the corner area. According to the method, processes of electrode evaporating, film coating, scribing and the like are simultaneously or sequentially carried out on the corner area of the solar battery epitaxial wafer so that solar batteries of different specifications can be manufactured, the epitaxial wafer can be utilized efficiently, the manufacturing process flow and the capacity of the solar batteries are not influenced, and the solar batteries formed on the corner area of the epitaxial wafer has the similar electrical property to that of the solar batteries formed on the main solar area.

Description

[0001] technical field [0002] The invention relates to the technical field of photovoltaic power generation, in particular to a method for manufacturing a solar cell. Background technique [0003] A solar cell is a device that uses the photovoltaic effect to convert light energy into electrical energy, also known as a photovoltaic device, mainly including monocrystalline silicon cells and gallium arsenide cells. The basic material of monocrystalline silicon solar cells for space vehicles is P-type monocrystalline silicon with a purity of 0.999999 and a resistivity of more than 10 ohm cm, including p-n junctions, electrodes and anti-reflection films, etc., and a light-transmitting cover is added to the illuminated surface A sheet (such as quartz or cerium glass) protects the battery from radiation damage from high-energy electrons and protons in the Van Allen band in space. The epitaxial wafer is a semi-finished product after the gallium arsenide layer epitaxial growth is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18
CPCH01L31/035281H01L31/18Y02E10/50Y02P70/50
Inventor 黄三玻贾巍王训春陈萌炯苏宝法王志彬朱亚雄姜德鹏陆剑峰
Owner SHANGHAI INST OF SPACE POWER SOURCES
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