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Solar cell preparation method

A technology of solar cells and equipment, applied in the field of solar cells, can solve problems such as performance degradation of solar cells, achieve the effects of reducing lattice defects, increasing body life, and reducing lattice free energy

Pending Publication Date: 2022-02-11
ZHEJIANG JINKO SOLAR CO LTD +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] In view of this, the present invention provides a method for preparing a solar cell, at least through the gettering layer formed by the polycrystalline silicon layer and / or phosphorus-doped silicon layer to getter the monocrystalline silicon wafer, effectively solving the problem of impurities in the silicon wafer in the prior art. The existence of the solar cells made of silicon wafers leads to a decrease in the performance of the solar cells

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Embodiment Construction

[0033] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0034] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0035] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, techniques, methods and devices should be considered part of the description.

[0036] In all examples shown and discussed herein, any specific values ​​should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have differen...

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Abstract

The invention discloses a solar cell preparation method. The preparation method comprises the following steps of obtaining a monocrystalline silicon wafer, forming a gettering layer on the surface of the monocrystalline silicon wafer, wherein the gettering layer at least comprises a polycrystalline silicon layer and / or a phosphorus-doped silicon layer, gettering the monocrystalline silicon wafer by using the gettering layer, after the gettering treatment is finished, removing the gettering layer, forming an emitter on the surface of the single side of the monocrystalline silicon wafer after the gettering layer is removed, and after the emitter is formed, forming passivation layers on the surface of the monocrystalline silicon wafer. Gettering is carried out on the monocrystalline silicon wafer at least through the gettering layer formed by the polycrystalline silicon layer and / or the phosphorus-doped silicon layer, so that the problem that the performance of a solar cell manufactured by the silicon wafer is reduced due to the existence of impurities in the silicon wafer in the prior art is effectively solved.

Description

technical field [0001] The present invention relates to the technical field of solar cells, and more specifically, to a method for preparing solar cells. Background technique [0002] At present, among all solar cells, crystalline silicon solar cells are one of the solar cells that have been widely commercialized. The presence of impurities in the silicon wafers reduces the performance of solar cells made from silicon wafers, so it is necessary to remove impurities from silicon wafers during the process of making solar cells. Contents of the invention [0003] In view of this, the present invention provides a method for preparing a solar cell, at least through the gettering layer formed by the polycrystalline silicon layer and / or phosphorus-doped silicon layer to getter the monocrystalline silicon wafer, effectively solving the problem of impurities in the silicon wafer in the prior art. The existence of silicon wafers leads to the problem that the performance of solar ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18
CPCH01L31/1804H01L31/186H01L31/1868Y02E10/547Y02P70/50
Inventor 郭瑶王钊郑霈霆杨洁张昕宇
Owner ZHEJIANG JINKO SOLAR CO LTD
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