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Solar crystalline silicon cell rework sheet processing technology

A technology of crystalline silicon cells and processing technology, applied in circuits, electrical components, sustainable manufacturing/processing, etc., to achieve the effect of reducing the proportion of defective wafers, flexible processing, and avoiding flower crystals and dark lines

Active Publication Date: 2017-05-17
HUNAN RED SUN PHOTOELECTRICITY SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, to provide a solar crystalline silicon cell that reduces the bad ratio of reworked sheets, avoids the problems of flower crystals and dark lines caused by traditional texturing rework, has a simple process, and is flexible in handling Rework processing technology

Method used

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  • Solar crystalline silicon cell rework sheet processing technology
  • Solar crystalline silicon cell rework sheet processing technology

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Embodiment 1

[0029] A solar crystalline silicon cell rework sheet processing process of the present invention, the solar crystalline silicon cell rework sheet is taken from the oxidizable rework sheet in Table 1.

[0030] Table 1 Classification of reworked sheets before rework processing

[0031] Oxidizable rework sheet Quantity (pieces) Textured rework sheet Quantity (pieces) Unclean 233 Abnormal wet sheet 156 Coating failure film 2108 Little white dot 384 The refractive index and film thickness exceed the standard 124 Handprint film after coating 234 Abnormal square resistance 553 Extensive dirt 105 - burnt 106 - Weight loss or suede abnormalities 30 - oil patch 167

[0032] Such as figure 1 As shown, the solar crystalline silicon cell rework sheet processing technology of the present invention comprises the following steps:

[0033] (1) Manual cleaning + spin-drying: put the oxidizable rework sheet in Ta...

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Abstract

The invention discloses a reworked solar crystal silicon cell processing technology comprising the steps as follows: (1) oxidizing a reworked solar crystal silicon cell; and (2) cleaning the reworked cell after oxidation treatment in step (1) in cleaning fluid to remove oxide generated in the oxidation process in step (1). The technology has the advantages of being capable of reducing the reject ratio of reworked cell processing and avoiding flower crystals and dark fringes caused by traditional texture-making rework, simple, flexible in processing, and the like, and can be combined with a traditional texture-making tail liquid reworking technology to be jointly applied to reworked cell reworking.

Description

technical field [0001] The invention belongs to the field of solar cell processing, and relates to a process for processing solar crystalline silicon cell rework sheets. Background technique [0002] During the manufacturing process of solar cells, due to appearance problems such as fingerprints, dirt, oil spots, small white spots, and color differences, a large number of silicon wafers with poor appearance are often produced. If these silicon wafers with poor appearance are sent to the screen printing process, they will be downgraded to B-type cells after screen printing, which affects the shipment rate of A-type cells in the battery production line, and the price of B-type cells is very low. , will also lead to a substantial increase in production costs. [0003] Therefore, for the above-mentioned semi-finished silicon wafers with poor appearance, they are usually classified as reworked wafers and reworked. At present, most manufacturers in China adopt the method of rewo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18H01L21/02
CPCH01L21/02096H01L31/18Y02P70/50
Inventor 刘源蔡先武刘贤金刘文峰周小荣
Owner HUNAN RED SUN PHOTOELECTRICITY SCI & TECH
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