Solar cell grid line structure and solar cell using the same

Abstract

The invention provides a solar cell grid line structure and a solar cell using the same, the solar cell grid line structure comprises a plurality of main grid lines which extend along a first direction and are arranged at intervals along a second direction, and a plurality of thin grid lines which extend along the second direction and are arranged at intervals along the first direction, the first direction is not parallel to the second direction, the plurality of main grid lines are electrically connected with the plurality of thin grid lines respectively, and each thin grid line is provided with a broken section between any two adjacent main grid lines. According to the solar cell grid line structure and the solar cell using the same, the silver paste consumption can be effectively reduced on the basis of ensuring the cell efficiency, and the preparation cost of the solar cell is reduced.

Description

technical field [0001] The invention mainly relates to the field of solar cells, in particular to a grid wire structure of a solar cell and a solar cell to which it is applied. Background technique [0002] Silver (Ag) has a low resistivity, can transport carriers efficiently, and has low resistance loss, and is widely used in solar cells and electronics industries. However, as a noble metal, Ag has limited reserves and high cost. In existing solar cells, the cost of Ag is about 70% of the cost of non-silicon. Therefore, whether the silver consumption can be reduced on the basis of ensuring battery performance is one of the main factors affecting the cost of photovoltaic power generation. [0003] Specifically, in solar cells, Ag is used as a metallized electrode to extract carriers and transport them to the external circuit. The specific process is to first grind silver into micro-nano particles, and then combine them with A viscous mixture of adhesives, solvents, additiv...

AI Technical Summary

Problems solved by technology

Other methods of preparing electrodes include electroplating and silver-coated copper particles. However, electrodes prepared by electroplating are generally composed of Ni / Cu / Ag, which can reduce the consumption of silver. However, electroplating will produce a large amount of waste liquid, which contains A variety of cations and toxic organic substances cannot be discharged directly, and the treatment cost is also high

On this basis, the silver-clad copper technology is not yet mature and has not yet been applied industrially.

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