Solar cell grid line slurry, preparation method thereof and solar cell

A technology for solar cells and grid lines, applied in the field of solar cells, can solve the problems of slurry overflow at the edge of grid lines, low aspect ratio, etc., and achieve the effects of improving efficiency, high aspect ratio, and low contact resistance

Pending Publication Date: 2021-06-25
SHENZHEN BAROY NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a solar cell grid wire paste, which aims to solve the technical problems that the existing solar cell grid wire paste has a wide line width, low aspect ratio, and the paste overflows seriously at the edge of the grid wire.

Method used

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  • Solar cell grid line slurry, preparation method thereof and solar cell
  • Solar cell grid line slurry, preparation method thereof and solar cell
  • Solar cell grid line slurry, preparation method thereof and solar cell

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preparation example Construction

[0071] The embodiment of the present invention also provides a preparation method of solar cell grid wire paste, comprising the following steps:

[0072] S10. Obtain the mixed slurry of conductive filler, polymer resin, curing agent, solution and auxiliary agent;

[0073] S20. Grinding the mixed slurry to obtain solar cell grid wire slurry.

[0074] The preparation method of the solar cell grid wire slurry in the embodiment of the present invention is to obtain the mixed slurry of conductive filler, polymer resin, curing agent, solution and auxiliary agent, and then grind the mixed slurry to obtain the solar cell grid wire slurry, the above-mentioned grid line slurry with high content of conductive filling factor and low contact resistance with the battery can be obtained, and the interaction force between the components of the slurry forms a cohesive force inside the grid line slurry, effectively controlling the grid line The precipitation of the solvent and the overflow of ...

Embodiment 1

[0084] A solar cell grid wire slurry, comprising the steps of:

[0085] ① Weigh 4.49g of Huntsman GY6010 epoxy resin is uniformly dispersed in 5.55g terpineol solvent I to obtain mixed solution A, which is an epoxy resin solution system. Weigh another 1.01g of Huntsman's curing agent 2844, uniformly dispersed in the mixed solution of 2.0g solvent I terpineol and 1.14g auxiliary agent I ethylene glycol diacetate to obtain mixed solution B, which is the curing agent solution system. The epoxy resin solution and the curing agent solution are mixed to obtain the bonding system of the slurry.

[0086] ② Weigh again 85.81g of submicron silver powder I, and mix the silver powder with the above-mentioned bonding system to obtain a mixed slurry. In the rotation-revolution mixer, the prepared silver paste was thoroughly mixed for 15 seconds at a speed of 3000 rpm. Finally, roll and disperse on a three-roll machine to obtain the final product—solar cell grid wire paste.

Embodiment 2

[0088] A solar cell grid wire slurry, comprising the steps of:

[0089] ① Weigh 3.11g of bisphenol F epoxy resin from Hexion 862, uniformly dispersed in 5.41g terpineol solvent I to obtain mixed solution A, which is an epoxy resin solution. Another 0.22g of imidazole curing agent 2MZ-Azine produced by CVC Thermal Specialties was weighed and uniformly dispersed in 3.0g of solvent I terpineol, 3.01g of auxiliary agent I ethylene glycol diacetate and 0.82g of auxiliary agent II 2,5- In the ternary mixed solution composed of dimethyl-2,5-hexanediol diacetate, the mixed solution B is obtained, which is the curing agent solution. The epoxy resin solution and the curing agent solution are mixed to obtain the bonding system of the slurry.

[0090] ② Weigh again 83.58g of submicron silver powder I, and mix the silver powder with the above-mentioned solution bonding system to obtain a mixed slurry. The prepared silver paste was thoroughly mixed for 15 seconds at a speed of 3000 rpm i...

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Abstract

The invention belongs to the technical field of solar cells, and particularly relates to solar cell grid line slurry which comprises 65%-94% of conductive filler, 0.5%-15% of polymer resin, 0.1%-10% of curing agent, 5.0%-25% of solvent and 0.4%-10% of an auxiliary agent. The auxiliary agent is selected from at least one of a curing accelerator, an alcohol acid diester auxiliary agent and a silicon-containing auxiliary agent. According to the solar cell grid line slurry, the content of conductive filling factors is high, the contact resistance of printed grid lines and the cell is small, the line width is narrow, the height-width ratio is high, and the effective light absorption area of the solar cell is effectively prevented from being reduced, so that the efficiency of the cell is improved.

Description

technical field [0001] The invention belongs to the technical field of solar cells, in particular to a solar cell grid wire paste and a preparation method thereof, and a solar cell. Background technique [0002] In recent years, new energy technologies have emerged one after another, such as nuclear energy, wind energy, solar energy, tidal energy, and biomass, among which solar energy is a clean, abundant and inexhaustible form of energy. With the advancement of technology, a variety of high-efficiency solar cells have been commercialized, including thin-film solar cells and crystalline silicon solar cells. At present, crystalline silicon solar cells have become the mainstream of the solar energy industry, including crystalline silicon PERC, TOPCon, IBC, high-efficiency heterojunction and so on. [0003] At present, the laboratory efficiency of n-type silicon high-efficiency heterojunction cells has reached 26.6%, and the efficiency on the production line has also reached 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B13/00H01L31/0224
CPCH01B1/22H01B13/00H01L31/022425H01L31/022433Y02E10/50
Inventor 徐长奇扎卡里·斯文德李春红
Owner SHENZHEN BAROY NEW MATERIAL TECH CO LTD
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