Water-based carrier for electronic slurry, electronic slurry containing the carrier and preparation method thereof

Abstract

The invention relates to a water-based carrier for electronic paste, electronic paste containing the water-based carrier and a preparation method of the electronic paste. The water-based carrier comprises the following components in percentage by weight: 70-93.5% of deionized water, 5-15% of aqueous binder, 0.5-5% of dispersing agent and 1-10% of plasticizer; the electronic paste containing the water-based carrier comprises the following components in percentage by weight: 50-79% of conductive particle, 1-10% of glass powder and 20-40% of the water-based carrier; the preparation method of the electronic paste containing the water-based carrier additionally uses a vacuum mixer to disperse the conductive particle and remove air bubbles in the paste. Compared with the prior art, the water-based carrier has a good environmental protection property, low cost and good wettability with powder; the electronic paste containing the water-based carrier can achieve excellent depth-width ratio and is green and environment-friendly; and besides, the method for preparing the electronic paste containing the water-based carrier is beneficial to further promoting the performances of the electronic paste.

Description

technical field [0001] The invention relates to an electronic slurry for solar cells, in particular to a water-based carrier for the electronic slurry, the electronic slurry containing the carrier and a preparation method thereof. Background technique [0002] A solar cell is a semiconductor device that converts solar energy into electricity. As energy issues become increasingly prominent, solar cells will play an increasingly important role in energy conservation and emission reduction as a way of utilizing renewable energy, and the market demand for solar cells will also increase. In the production process of solar cells, electronic paste is one of the main raw materials. Among them, the positive silver paste is used to make the grid line of the battery, including the fine grid and the main grid; the back field aluminum paste is used to make the back electric field of the battery; the back silver paste is used to make the back electrode of the battery. Solvents are neede...

AI Technical Summary

Problems solved by technology

Solvents are needed in these types of electronic pastes; common electronic pastes for solar cells are mostly solvent-based, and the solvents will volatilize into the environment during the drying process, which not only pollutes the environment, but also affects the health of the staff. caused harm

In addition, the solvent used is non-renewable, increasing its production cost

[0003] As a substitute for solvent-based electronic paste, the Chinese patent publication No. CN102592705A discloses an environmentally friendly water-based solar cell anode silver paste and its preparation method. The silver paste uses a water-based carrier instead of a commonly used organic carrier. Environmentally friendly; however, due to the high surface tension of water, the wettability between the water-based carrier and the powder is poor, and bubbles inevitably exist in the prepared slurry, which makes fine and dense printing of electrodes and grid lines difficult. accomplish

In addition, this type of paste is prone to problems such as electrode cracking and deformation during the drying process after printing.