Preparation method of solar cell with elimination of printing wave line

Abstract

The invention relates to a preparation method of a solar cell with elimination of a printing wave line. The method is characterized in that the method comprises the following steps that: a silicon wafer is inserted into a petal basket along the downward direction of a cutting trace of the silicon wafer; the monocrystalline silicon wafer is provided and surface texturing is carried out; the processed silicon wafer is inserted into a quartz boat along the downward direction of the cutting trace of the silicon wafer; a diffusion layer is formed on the surface of the silicon wafer that has been processed by texturing; the diffused silicon wafer is placed in a bearing box along a certain direction; etching is carried out to remove PN nodes around the silicon wafer as well as the etched silicon wafer is inserted into the petal basket along the downward direction of the cutting trace of the silicon wafer; pickling is carried out to remove phosphosilicate glass; a passivation and antireflection layer is manufactured; and the silicon wafer that has been processed by film coating is placed in a to-be-printed bearing box along a certain direction, so that after printing, a fine grid line direction is vertical to a cutting line direction; and a cell back side slurry and a right side slurry are successively printed as well as sintering is carried out to form a back side Ag electrode, a back side aluminium back surface field and a right side Ag electrode. According to the invention, the method can be operated simply and conveniently; and compared with a traditional production mode, the industrialized production mode enables no extra production cost to be generated.

Description

technical field

[0001] The invention relates to a method for manufacturing a semiconductor element, in particular to a method for preparing a solar cell that eliminates printing ripples, and belongs to the technical field of solar cell production. Background technique

[0002] With the continuous development of solar cell production technology, the industry's requirements for battery quality are also constantly improving, not only reflected in the electrical performance of the battery, but also have higher requirements for the appearance of the battery. In the process of making solar cells, screen printing is an extremely important process. The positive electrode, the back electrode and the back electric field are printed on the front and back of the battery by screen printing. The printing quality of the positive electrode has a great influence on the appearance quality of the battery. In the normal production process, the appearance of the printed grid line of the positive...