Silk-screen printing method for positive electrode of solar battery

Abstract

The embodiment of the invention provides a silk-screen printing method for a positive electrode of a solar battery, comprising the steps of: providing a silk-screen printing substrate; cutting the silk-screen printing substrate into a proof printing sheet according to the same size and thickness with a silicon wafer to be printed; performing proof printing on the proof printing sheet to obtain a proof printing electrode; judging whether the proof printing electrode obtained by performing proof printing on the proof printing sheet meets the predetermined demand; if so, determining a parameter which is used in the process of performing proof printing on the proof printing sheet to obtain the proof printing electrode, as a silk-screen printing parameter; and performing a silk-screen printing operation on a front side of the silicon wafer to be printed according to the silk-screen printing parameter. Compared with the prior art, the method avoids reduction of electrical properties caused by performing the silk-screen printing operation on the silicon wafer to be printed directly or performing multiple silk-screen printing operations, therefore, the overall property of the solar battery formed with the positive electrode is improved.

Description

technical field [0001] The invention relates to the technical field of solar cell manufacturing, in particular to a screen printing method for a front electrode of a solar cell. Background technique [0002] In the manufacturing process of monocrystalline silicon or polycrystalline silicon solar cells, most of the solar cells are manufactured by printing the front electrode by screen printing process, and a screen must be used in this process. The service life of the screen is generally about 8 hours. After the service life of the screen is over or the front electrode of the solar cell is badly printed, a new screen needs to be replaced to ensure the qualified printing quality. [0003] The position of the printed pattern on the front of the solar cell usually shifts after a new screen is replaced, so it is necessary to perform a trial printing operation first to observe whether the position of the printed pattern is correct and to adjust the position of the printed pattern....

AI Technical Summary

Problems solved by technology

[0004] However, wiping the silicon wafer will lead to a decrease in the electrical properties of the silicon wafer, so because the front electrode after trial printing does not meet the requirements, wiping the silicon wafer to be printed will cause the electrical performance of the silicon wafer to be printed to decrease, which will further affect the front side. The overall performance of the silicon wafer to be printed after the electrode is formed is reduced

Images