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Conductive silver paste and preparation method and application thereof

A technology of conductive silver paste and silver powder, which is applied in the field of solar cells, can solve problems such as difficult control, adverse effects of bonding tension, and reduce corrosion in the sintering process, so as to achieve high photoelectric conversion efficiency, good welding tension and aging performance, and adhesion good binding effect

Active Publication Date: 2019-03-29
SUZHOU ISILVER MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, by formulating a new system of glass powder, reducing the amount of glass powder used, reducing the corrosion during the sintering process, thereby reducing the damage to the passivation layer on the surface of the solar cell, it is difficult to control, and the reduction in the use of glass powder will reduce the It will have an adverse effect on the bonding tension of the silver paste after sintering

Method used

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  • Conductive silver paste and preparation method and application thereof
  • Conductive silver paste and preparation method and application thereof
  • Conductive silver paste and preparation method and application thereof

Examples

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Embodiment

[0066] This embodiment provides a conductive silver paste, which is prepared through the following steps.

[0067] Preparation of glass powder composition: raw materials are mixed (45 parts of bismuth oxide, 18 parts of silicon oxide, 20 parts of aluminum oxide, 15 parts of boron oxide, 2 parts of sodium oxide, potassium oxide, magnesium oxide, barium oxide, zinc oxide), and then Perform melting, quenching, grinding, and water washing processes to obtain a glass powder composition;

[0068] Prepare organic vehicle: mix solvent (75 parts of butyl carbitol acetate), cellulose resin (10 parts of ethyl cellulose), additives (4 parts of oleic acid, 3 parts of polypropylene glycol, 8 parts of polyamide wax), get an organic carrier;

[0069] Prepare conductive silver paste, mix silver powder, glass powder, organic vehicle and organosilicon compound,

[0070] Or, after mixing with the raw materials of the organic carrier when preparing the organic carrier, then mix with other raw ma...

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Abstract

The invention provides a conductive silver paste and a preparation method and an application thereof. The raw materials of the conductive silver paste include a conductive silver paste base material and an organic silicon compound. There are 0.1-5 parts of the organic silicon compound by weight, and the total mass of the conductive silver paste is 100 parts. The organic silicon compound is used toform a silicon oxide protective layer. The conductive silver paste of the invention can be used to prepare a back electrode and a main gate electrode. The conductive silver paste can improve the bonding strength of a silicon substrate without destroying the passive film of a battery pole piece.

Description

technical field [0001] The invention relates to a conductive silver paste, in particular to a conductive silver paste used for back electrodes and main grid electrodes, and belongs to the technical field of solar cells. Background technique [0002] The biggest difference between Passivated Emitter and Rear Surface Passivated Cells (PERC) and ordinary silicon solar cells is that the back surface is protected by thin layers such as aluminum oxide and silicon nitride, and the back silver electrode and the back aluminum back field are no longer directly connected with the solar cell. The contact of the silicon solar cell reduces the surface recombination rate, increases the open circuit voltage of the silicon solar cell, and finally improves the efficiency of the silicon solar cell. [0003] Due to the addition of a passivation layer on the back of the cell, the direct contact area between the silver electrode on the back and the silicon cell is greatly reduced, which will lead...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01L31/0224H01B13/00
CPCH01B1/22H01B13/00H01L31/022425
Inventor 陈东锋包娜孙达汪山周欣山
Owner SUZHOU ISILVER MATERIALS
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