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Solar cell annealing method and annealing equipment

A technology for solar cells and annealing equipment, applied in the field of solar photovoltaic, can solve the problems of insufficient repair of solar cells, poor efficiency and stability of solar cells, poor battery quality, etc., to improve conversion efficiency and stability, improve passivation effect, density high effect

Pending Publication Date: 2022-04-29
LONGI SOLAR TECH (XIAN) CO LTD
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Problems solved by technology

[0003] At present, in the photovoltaic field of solar cells, hydrogen annealing treatment is mainly used after screen printing. However, the current hydrogen annealing process may have the problem of hydrogen overflow, which cannot fully repair the defects of solar cells, making the efficiency stability of solar cells poor. There is a problem of efficiency drop, resulting in poor battery quality

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  • Solar cell annealing method and annealing equipment
  • Solar cell annealing method and annealing equipment

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Embodiment Construction

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0033] figure 1 Shows a flow chart of the steps of a solar cell annealing method in an embodiment of the present invention, as figure 1 As shown, the method may include:

[0034] Step 101 , injecting supercritical carbon dioxide into the substrate in the hydrogen atmosphere within a first process time.

[0035] In the embodiment of the present invention, the substrate can be a battery structure that requires an annealing process in the solar cell man...

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Abstract

The invention provides a solar cell annealing method and annealing equipment, and relates to the technical field of solar photovoltaics. Supercritical carbon dioxide is introduced into the substrate in the hydrogen atmosphere in the first process time, then light injection is carried out on the substrate in the second process time, the supercritical carbon dioxide is high in density and high in hydrogen solubility, and hydrogen can be better transmitted to the substrate, so that the problem of hydrogen overflow is avoided, and the hydrogen passivation effect is enhanced; after hydrogen excitation is carried out through light injection, the defects of the substrate can be fully saturated, and the recombination loss is reduced, so that the passivation effect is improved, and the conversion efficiency and stability of the cell are improved.

Description

technical field [0001] The invention relates to the field of solar photovoltaic technology, in particular to a solar cell annealing method and annealing equipment. Background technique [0002] Annealing is a widely used post-treatment method in the preparation process of solar cells. During annealing, it can cause changes in the defect state of solar cells and increase the power of solar cells. [0003] At present, in the photovoltaic field of solar cells, hydrogen annealing treatment is mainly used after screen printing. However, the current hydrogen annealing process may have the problem of hydrogen overflow, which cannot fully repair the defects of solar cells, making the efficiency stability of solar cells poor. The problem of efficiency drop occurs, resulting in poor battery quality. Contents of the invention [0004] The invention provides a solar cell annealing method and annealing equipment, aiming at fully repairing the defects of the solar cell, improving the e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18
CPCH01L31/1864H01L31/1868
Inventor 吴帅
Owner LONGI SOLAR TECH (XIAN) CO LTD
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