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Solar cell manufacturing method and system

A solar cell and preparation system technology, which is applied in the field of solar cell preparation, can solve the problem of low concentration of solar cell efficiency distribution, achieve the effect of improving the concentration of cell efficiency and reducing the proportion of inefficiency

Inactive Publication Date: 2019-02-19
BAODING GUANGWEI GREEN ENERGY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a solar cell preparation method and system for the problem that the traditional solar cell preparation method easily leads to a low concentration of the efficiency distribution of the final produced solar cell

Method used

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  • Solar cell manufacturing method and system
  • Solar cell manufacturing method and system

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Embodiment Construction

[0059] In order to make the technical solution of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0060] First of all, it should be noted that the substrate in the present invention refers to the substrate used in the preparation of solar cells. That is, the substrate layer portion in the solar cell. It can be made of various materials, such as silicon wafers such as monocrystalline silicon or polycrystalline silicon.

[0061] In addition, the first feature and the second feature mentioned in the present invention refer to one or some of the features of the substrate during the processing of the substrate. For example, the first characteristic includes two characteristics of the line mark depth (surface damage layer) and resistivity of the substrate. The second feature includes the square resistance and thickness of the substrate. Wherein, it should be no...

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Abstract

The invention discloses a solar cell manufacturing method and a system. The method comprises the following steps: first features of substrates are detected, corresponding first feature parameters are acquired, and after the substrates are classified according to the first feature parameters, first process processing in different process conditions is carried out on the substrates of different classes; second features of the substrates after the first process processing are detected, corresponding second feature parameters are acquired, and after the substrates are classified again according to the second feature parameters, second process processing in different process conditions is carried out on the substrates of different classes. The process of detecting the features of the substrates and classifying the substrates is combined to each processing process of the substrates, and effects of differential processing are realized. Finally, the cell efficiency concentration degree is effectively enhanced, and the low efficiency proportion is reduced.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a solar cell preparation method and system. Background technique [0002] At present, when polysilicon for solar cells is prepared, the production process of directional solidification is usually adopted. However, due to the influence of impurities and grain boundary quality of polysilicon prepared by directional solidification, the quality of silicon wafers at different positions of the silicon block is different. At the same time, when the silicon block is cut, tooled and other operations are performed, the thickness, damaged layer and light reflectance of each silicon wafer obtained are also different. [0003] Therefore, when using the above-mentioned silicon wafers for the preparation of solar cells, it is necessary to classify the silicon wafers first (that is, to detect the appearance characteristic parameters such as the thickness, resistivity and external dimensions...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18H01L21/66
CPCH01L22/12H01L22/14H01L22/20H01L31/18H01L31/186Y02E10/50Y02P70/50
Inventor 于琨张兴亮魏强张魏征
Owner BAODING GUANGWEI GREEN ENERGY TECH CO LTD
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