Conductive paste for solar cells and preparation method thereof

A solar cell and conductive paste technology, applied in the field of solar cells, can solve problems such as low welding strength, decreased battery performance, and reduced density, and achieve the effects of high welding strength, improved battery performance, and enhanced adhesion
CN103295659BActive Publication Date: 2016-03-30BYD CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BYD CO LTD
Publication Date
2016-03-30

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Abstract

The invention provides electrocondution slurry for a solar cell and a manufacturing method of the electrocondution slurry. The electrocondution slurry comprises electrocondution metal powder, inorganic glass powder and an organic carrier. D50 of the inorganic glass powder is 100-300nm, D10 of the inorganic glass powder is 10-70nm, and D90 of the inorganic glass powder is 400-700nm. The inorganic glass powder is manufactured through a sol-gel method, glass powder with a particle size smaller than 1 micron is obtained accidentally, the size distribution of the glass powder is even, and meanwhile doping is even. The manufactured electrocondution slurry is free of a cross phenomenon in the process that the solar cell is manufactured and sintered, the adhesive force of the electrocondution slurry and a silicon layer and the welding strength of the electrocondution slurry and a welding belt are greatly improved, and sintering temperature is low.
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Description

technical field

[0001] The invention belongs to the technical field of solar cells, in particular to a conductive paste for solar cells and a preparation method thereof. Background technique

[0002] With the depletion of traditional energy sources and the aggravation of environmental pollution, the development and application of new energy sources has become a hot spot in human research. Inexhaustible, green and pollution-free solar energy is one of the key points in the development and utilization of new energy.

[0003] Conductive paste is an important material for making silicon-based solar cells. Silicon-based solar cells are generally prepared by printing a conductive paste on a silicon substrate, followed by drying and sintering to prepare the back field and electrodes. The existing conductive paste is mainly formed by mixing, stirring and rolling functional powder (metal powder), inorganic glass powder and organic carrier. The metal powder is generally silver powd...

Claims

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