Device and method for manufacturing silicon solar cell electrode printing screen through laser

Abstract

The invention relates to a device and a method for manufacturing a silicon solar cell electrode printing screen through a laser. The device comprises a laser device (1), wherein the laser emitted by the laser device (1) passes through an optical shutter (2) and a beam expander (3) so as to be incident on the surface of a laser mirror (4); is reflected by the laser mirror (4); sequentially passes through a half-wave plate (5), a Glan prism (6) and a rotary module (7) so as to be incident on the surface of another laser mirror (4); is reflected by the laser mirror (4); and enters into a galvanometer system (8). The laser emitted from the galvanometer system (8) is focused through a focus lens (9) so as to be over against a workpiece to be machined (16) on a platform (13). According to the device and the method for manufacturing the silicon solar cell electrode printing screen through the laser, the service life of the solar cell printing screen can be effectively improved, and the printing quality of a solar cell electrode is improved.

Description

technical field [0001] The invention relates to a device for manufacturing solar cell electrode printing screen plates by laser, and the manufacturing method, which belong to the field of photovoltaic technology. Background technique [0002] At present, with the continuous development of silicon solar cell technology, the industry puts forward higher requirements on the conversion efficiency of silicon solar cells and the production cost of silicon solar cells. [0003] The production of general silicon solar cells mainly includes the following steps, 1. Removal of the damaged layer; 2. Surface texturization; 3. Diffusion of the emission area; 4. Edge junction etching; 5. PECDV deposition of SiN; 6. Screen printing Front and back electrode paste; 7. Co-firing to form metal contacts; 8. Cell testing. Among them, the electrode paste on the front and back of the screen printing directly affects the conversion efficiency of the solar cell. At present, the commonly used screen ...

AI Technical Summary

Problems solved by technology

Among them, the electrode paste on the front and back of the screen printing directly affects the conversion efficiency of the solar cell. The currently commonly used screen printing screen is made of polyester wire or stainless steel wire cross-woven and tightly stretched on a metal frame. This screen, The width and height of the printed grid lines are not uniform, which affects the free electron passage efficiency generated by the solar cell, thereby reducing the conversion efficiency of the solar cell; in addition, the service life of this kind of screen is short, which affects the processing cost

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