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Conductive silver paste for flexible thin-film solar cell module and preparation method of conductive silver paste

A technology of solar cells and conductive silver paste, which is applied in the field of solar cells, can solve the problem of damage to the comprehensive conductivity of components, and achieve the effects of improving stability and reliability, good wettability, and improving adhesion

Inactive Publication Date: 2020-06-30
紫石能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these components have improved the lateral tension or conductivity of the conductive silver paste of crystalline silicon solar cells, the combination of the above-mentioned Pb-containing inorganic components is not suitable for flexible thin-film solar conductive silver paste, and will affect the overall conductivity of the module. There is damage; Simultaneously these prior art also do not give enough attention to the problem of how to improve the bond fusion of the copper electrode of solar cell and silver paste, reduce the contact resistance between the two

Method used

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  • Conductive silver paste for flexible thin-film solar cell module and preparation method of conductive silver paste
  • Conductive silver paste for flexible thin-film solar cell module and preparation method of conductive silver paste

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preparation example Construction

[0040] according to figure 1 Shown, be the preparation method of a kind of flexible thin film solar cell module of the present invention conductive silver paste, it comprises:

[0041] S1: Weigh the components constituting the organic adhesive according to the proportion of the formula, mix them in a container and heat to 80-100°C, and keep stirring to obtain a paste-like organic adhesive with uniform color for later use; it is preferable to use an oil bath to keep the temperature constant Heat to 80-90°C, and stir for 4 hours.

[0042] S2: Mix the paste-like organic binder and organic-coated modified metal copper particles, and continue to stir to form a mixture; adjust the rolling temperature and the rolling gap of the three-roll mill, and place the mixture on the three-roll mill Disperse by rolling for 5-10 times; the preferred rolling temperature is 25-28°C.

[0043] S3: then continuously add silver powder and metal oxide additives in the three-roll machine, stir while a...

Embodiment 1

[0049] (1) Preparation of organic binder

[0050] Take by weight respectively 20% terpineol, 29% ethylene glycol phenyl ether acetate, 29% diethylene glycol butyl ether, 2% lauryl alcohol ester, 14% rosin, 3% Polypropylene resin and 3% lecithin were uniformly mixed in a beaker, heated to 90° C. in an oil bath at a constant temperature, and stirred continuously for 4 hours to obtain a paste-like organic adhesive with uniform color for future use.

[0051] (2) The preparation of conductive paste is divided into four steps:

[0052] The first step, take by weighing the above-mentioned organic binder that mass percent is 20% and the Cu particle that 2% organic matter is coated with modification, fully stirs evenly in the stainless steel round basin, takes by weighing 75% silver powder (average particle diameter) simultaneously 0.5~3 μm spherical silver powder) and 3% metal oxide doping aid SnO powder (particle size is equivalent to silver powder) in another stainless steel round ...

Embodiment 2

[0059] (1) Preparation of organic binder

[0060] Take by weight respectively 20% terpineol, 29% ethylene glycol phenyl ether acetate, 24% diethylene glycol butyl ether, 2% lauryl alcohol ester, 14% rosin, 3% Polypropylene resin, 5% nitrocellulose, and 3% lecithin were uniformly mixed in a beaker, heated to 90° C. in an oil bath, and kept stirring for 4 hours to obtain a paste-like organic adhesive with uniform color for use.

[0061] (2) The preparation of conductive paste is divided into four steps:

[0062] The first step, take by weighing the above-mentioned organic binder that mass percent is 20% and the Cu particle that 8% organic matter coats modification, fully stir in the stainless steel round basin, weigh 70% silver powder (average particle diameter) simultaneously 0.5-3μm spherical silver powder) and 1% metal oxide doping aid ZnO powder and 1% Y 2 o 3 The powder (the particle size of the auxiliary agent is equivalent to that of silver powder) is stored in another...

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Abstract

The invention relates to conductive silver paste for a flexible thin-film solar cell module. The conductive silver paste comprises the following components in percentage by mass: 70-80% of silver powder, 15-22% of an organic adhesive, 1-10% of a metal oxide additive and 1-10% of organic matter coated and modified metal copper particles. The metal oxide additive and the organic matter coated and modified metal copper particles added into the conductive silver paste have an obvious improvement effect on the transverse tension resistance of the cured conductive silver paste, and the organic matter coated and modified metal copper can also ensure that the conductivity of the conductive silver paste is not too low. The invention also relates to a preparation method of the conductive silver paste.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a conductive silver paste for flexible thin-film solar cell components and a preparation method thereof. Background technique [0002] At present, during the manufacture of industrialized thin-film solar cell modules, conductive silver paste is required to connect the positive and negative electrodes when two adjacent thin-film cells are connected in series. Thin-film solar cells are flexible solar cells, and the connection effect between adjacent cells of the module is particularly important in the folding process that may occur in the actual application of the module. If the silver paste has poor adhesion, low transverse tensile strength, poor stability, and low conductivity, it is likely to cause the adjacent cells to separate, affecting the efficiency and service life of the module. In severe cases, the entire module may fail . In addition, when the battery components a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B13/00H01L31/0224H01L31/18
CPCH01B13/00H01B1/22H01L31/022425Y02E10/50
Inventor 郭志敏李琳琳樊成源崔常伟
Owner 紫石能源有限公司
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