A biomimetic preparation method for grid lines of crystalline silicon solar cells

Abstract

The invention relates to a biomimetic preparation method of a crystal silicon solar cell grid line, which comprises the following steps that a nickel solution required by a biomimetic liquid phase deposition nickel membrane and a copper solution required by a liquid phase deposition copper grid line are prepared; a PN junction cell piece is integrally glued to form a photoresist membrane; the photoresist membrane is covered with a mask plate fabricated according to a structure of the grid line for masking; exposure is conducted by ultraviolet rays; a photoetched window is obtained by developing; the photoetched cell piece is immersed into the prepared nickel solution; a temperature of the solution is kept to be 20-75 DEG C; illumination is conducted for 0.5-6h; the illumination intensity is equivalent to 0.5-3 suns; nickel grid lines are generated on the photoetched cell piece; the nickel membrane cell piece accomplished by biomimetic liquid phase deposition is immersed into the prepared copper solution; the temperature of the solution is kept to be 25-80 DEG C; a power supply is added; and electro-deposition is conducted on copper grid lines. The method has the benefits that the method is simple, unique, easy to master, convenient to operate, reliable in repetition and low in cost.

Description

technical field [0001] The invention relates to the technical field of preparation of crystalline silicon solar cells, in particular to a method for bionic preparation of grid lines of crystalline silicon solar cells. Background technique [0002] The severe energy crisis and deteriorating environmental problems have made vigorously developing new energy sources a global research hotspot. Among them, solar energy is an inexhaustible green and environmentally friendly energy, and solar cells based on this, as a clean and efficient green sustainable energy, are expected to become the main body of the world's energy. Therefore, obtaining low-cost, high-efficiency solar cells has become an important goal of new energy development. In order to achieve this goal, the shading area of ​​the grid lines on the surface of the battery needs to be reduced, and at the same time, it must have an efficient charge collection capability, so the preparation of the solar cell grid lines is par...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of low battery conversion efficiency, low battery performance and high production cost in the existing solar cell grid line preparation method, the present invention provides a crystalline silicon solar cell grid line with low production cost and improved cell conversion efficiency. Bionic preparation method

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