Solar cell electrode printing screen, solar cell electrode and manufacturing method thereof

Abstract

A solar cell electrode printing screen comprises a first screen and a second screen; the first screen comprises a first template; a plurality of first thin grids are formed in the first template; the first template is provided with alignment holes and wedge-shaped holes; the second screen comprises a second template; the second template is provided with a plurality of second thin grids and main grids; the second thin grids and the main grids are intersected; the distance between axes of the adjacent two second thin grids is equal to that between axes of the adjacent two first thin grids; the width of the second thin grids is smaller than or equal to that of the first thin grids; the main grids are provided with alignment portions; one ends of the main grids are provided with sharp corner hollow-outs; the shortest distance between edges of the alignment portions and end surfaces of the top ends of the sharp corner hollow-outs is equal to that between the edges of the alignment holes and the edges of the wedge-shaped holes. According to the solar cell electrode printing screen, substrates after the second screen and the first screen are printed are accurately aligned and dislocation of a thin grid line during printing at the second time and a thin grid line during printing at the first time is avoided. The invention also provides a solar cell electrode and a manufacturing method thereof.

Description

technical field [0001] The invention relates to a printing screen for a solar cell, in particular to a secondary printing screen for a solar cell electrode and a solar cell electrode. Background technique [0002] There are two ways to use solar energy: passive use of photothermal conversion and photoelectric conversion. Solar power is an emerging renewable energy source. The solar power generation system is composed of a solar cell group, a solar controller, and a storage battery (group). A solar cell is a device that directly converts light energy into electrical energy through the photoelectric effect or photochemical effect. Solar cells are the core part of the solar power generation system, and also the most valuable part of the solar power generation system. Its function is to convert the solar energy into electrical energy, or store it into the battery, or promote work load. The quality and cost of solar cells will directly determine the quality and cost of the en...

AI Technical Summary

Problems solved by technology

However, in the prior art, the calibration alignment of the screen printing machine is inaccurate. If the grid lines printed twice are not accurately aligned, the two grid lines will be easily misaligned, increasing the shading area and affecting the photoelectric conversion of the solar cell. efficiency

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