Weak-brightness non-crystal silicon solar cell manufacture method using laser etching transparent electrode

Abstract

The invention discloses a method to fabricate a weak light amorphous silicon solar cell, which scribes the transparent electrodes through laser. The method includes the following processes(1), transparent electrode isolation grooves are scribed on the film of an ultra-thin conductive glass through a red laser scriber so as to form insulated transparent electrodes for the amorphous silicon solar cell;(2), a P-I-N amorphous silicon layer is deposited on the surface of the ultra-thin conductive glass through vacuum plating.; (3), isolation grooves penetrating the P-I-P amorphous silicon layer are scribed on the surface of the amorphous silicon film through a green laser scriber so as to expose the transparent electrodes in the isolating grooves; (4) conductive printing ink is printed on the surface of the amorphous silicon layer through a screen printing machine so as to form insulated and isolated back electrodes which respectively penetrate the isolation grooves and are electrically connected with the corresponding transparent electrodes through the amorphous silicon layer; (5), protective lacquer, conductive copper slurry and characters are processed on the back electrodes through screen printing. The invention can not only reduce production cost but also simplify production process and is good for improving the electrical properties of the products.

Description

technical field [0001] The invention discloses a method for manufacturing a weak-light amorphous silicon solar cell by laser marking a transparent electrode, which belongs to the field of solar cells. Background technique [0002] At present, the general practice of amorphous silicon solar cell manufacturers is: (1) Clean the 600A sputtered conductive film with a cleaning machine 0 (2) screen-print acid-resistant ink on the table of the screen printing machine, (3) put it in the oven and bake it at a temperature of 120°C for 10 minutes, and then take it out after the temperature drops to 45°C (4) Etching with an acidic solution by an etching machine to obtain etched lines. The concentration of the acidic solution is 6.4-6.7mol. (5) Washing off the production process of the acid-resistant ink with an alkaline solution to obtain conductive glass with etched lines. The concentration of the alkaline solution is 1.8-2.2mol. (6) After vacuum coating, a P-I-N structure amorphous s...

AI Technical Summary

Problems solved by technology

This method of producing low-light amorphous silicon solar cells by silk-screen etching transparent electrodes consumes more raw materials, increases the cost of comprehensive treatment of waste, and is too cumbersome in the overall process, requiring more manpower , which increases the manufacturing cost of the product, and affects the electrical performance of the product to a certain extent

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