Restoring method of eroded defective products of amorphous silicon cells and special device

Abstract

The invention discloses a restoring method of eroded defective products of amorphous silicon cells. 10-30 V reverse DC voltage is applied to cell units with slight metal residues to form short-circuit current for fusing the slight metal residues, thereby restoring the eroded defective products. The invention also discloses a special device used in the restoring method of eroded defective products of amorphous silicon cells, comprising a DC power supply with adjustable output voltage, a conducting probe, an operation platform, a probe bracket and a probe holder. The restoring method of eroded defective products of amorphous silicon cells and the special device can be used for effectively restoring most of eroded defective products generated in the production of amorphous silicon cells, greatly improve the production yield, and have favorable economic benefit.

Description

technical field [0001] The invention relates to the technical field of solar cell production, in particular to the production of amorphous silicon solar cells. Background technique [0002] With the development of the global environmental protection industry, solar photovoltaic power generation, as the most important clean and direct form of energy, has been paid more and more attention by people, and a large number of solar cells have already entered thousands of households. [0003] At present, the solar photovoltaic cells produced and used in batches are mainly silicon solar cells based on silicon, which can be divided into monocrystalline silicon cells, polycrystalline silicon cells and amorphous silicon cells. Among them, amorphous silicon cells have become the fastest-growing category of solar cell production due to their low production cost and good high-temperature performance. [0004] The amorphous silicon solar cell structure is divided into five layers: the firs...

AI Technical Summary

Problems solved by technology

[0006] In the mass production of amorphous silicon solar cells, most of the defective products are produced during laser etching, especially in the P3 process, the etching is not complete and there are fine metal residues. These fine metal residues will form short-circuit points and cause battery failure. The conversion efficiency is reduced, which will seriously cause the battery to be scrapped; even a slight short circuit will easily cause hot spots in the long-term use of the battery, resulting in a decrease in service life

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