Surface treatment method of low temperature glass for solar cell conductive slurry

Abstract

The invention discloses a surface activity treatment method of low temperature glass, and specifically relates to a surface treatment method applied to low temperature glass used by the frontal electrode slurry of a crystal silicon solar cell. The method performs special surface treatment for the surface of low-l-melting-point glass. The treatment method is capable of dissolving a surfactant in a solvent, and then adds the mixture in the process of grinding glass micro powders, or uses the surfactant to directly treat the well ground glass micro powders. The surfactant comprises one or more of sorbitan trioleate, lecithin, nonyl phenol epoxy adduct, propanetriol monooleate, high-grade fatty alcohol phosphate, triethanolamine and n-octyl ester. The glass micro powders treated by the method have better infiltration for the organic carriers in the slurry such that the glass micro powders have better dispersivity in the slurry and have repeatability and uniform stability in the production process of the slurry, such that the solar cell has better combination property.

Description

technical field [0001] The invention relates to a surface treatment method of low-temperature glass, in particular to a surface treatment method of low-temperature glass used in a conductive paste for front electrodes of solar cells. Background technique [0002] The main principle of a solar cell is to place a thinner N-type semiconductor on a thicker P-type semiconductor by using semiconductor materials. When photons hit the surface of the device, there is electron diffusion at the junction of P-type and N-type semiconductors. The current can be drawn out by using the metal conductors at the upper and lower ends. The electrode connected to the N-type semiconductor is called the front electrode. Currently, the main method for preparing front electrodes is a screen printing process. The silver electronic paste for the positive electrode of crystalline silicon solar cells is a sinterable thick film conductive paste, which is printed on the silicon wafer by screen printing p...

AI Technical Summary

Problems solved by technology

However, because the current low-temperature glass is mainly composed of elements such as lead, silicon, boron, aluminum, zinc, etc., which makes the glass surface less hydrophilic, and the slurry formula contains a large amount of organic solvents and plasticizers, so the low-temperature glass in the slurry Poor dispersibility will cause unstable battery quality

At the same time, due to the poor dispersion of the glass phase in the slurry, the glass powder will agglomerate during the storage of the slurry, which will affect the fineness and thixotropy of the slurry

[0005] At present, in the production process of the paste, people will carry out surface treatment on the silver powder in the paste, but there is no surface treatment for the glass surface, and there is no relevant literature record

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