Front and back surface electrodes of screen printing crystalline silicon solar cell and manufacturing method thereof

Abstract

The invention discloses front and back surface electrodes of a screen printing crystalline silicon solar cell and a manufacturing method thereof; array points which are not printed into conductive paste are manufactured in an electrode main gate line; and the graphics of each array point is in a closed type. The manufacturing method comprises the step of arranging latex film array points on the screen printing plate electrode main gate line for blocking the conductive paste. The positive and back surface electrodes of the screen printing crystalline silicon solar cell and the manufacturing method thereof can effectively save the conductive paste on the positive and back surfaces of the crystalline silicon solar cell, and effectively eliminate the stress caused by different expansion coefficients of silver silicon alloy and silicon, thereby reducing the bending rate of a cell film and the welding debris rate of a component; the invention can enhance the adhesion firmness of the main gate line conductive paste on the silicon surface after being sintered and effectively solve the falling-off problem of a silver main gate line; and the invention reduces the surface contact area of the conductive paste and the silicon, and increases the open-circuit voltage and the short-circuit current.

Description

Technical field: [0001] The invention relates to a front and back electrode of a screen-printed crystalline silicon solar cell and a manufacturing method thereof. Background technique: [0002] Crystalline silicon solar cells are semiconductor devices that directly convert light energy into electrical energy. The current generated inside the semiconductor needs to be collected by positive and negative electrodes and drawn out to connect to an external circuit. In addition to the function of collecting and drawing out current, the positive and negative electrode busbars also have the functions of testing and sorting solar cells, welding and interconnecting individual solar cells, thereby increasing output power, etc.; in order to reduce the shading loss of electrodes and the The loss of series resistance caused by resistance, the production of electrodes requires the use of conductive paste made of precious metal silver; at the same time, it is required that the positive and ...

AI Technical Summary

Problems solved by technology

The use of conductive paste increases the production cost of the battery, and leads to the bending deformation of the battery after the battery is sintered. The bending of the battery in the welding interconnection leads to an increase in the fragmentation rate and other factors, which make the cost of crystalline silicon solar power generation high.

Images