Method for manufacturing solar cell

The invention relates to a method for manufacturing a solar cell. The method comprises the following steps of: etching a longitudinal main grating groove and a transverse grating groove on the front surface of a silicon chip by laser, making the surface reacted by adding dilute solution of NaOH to form a pile surface, washing the pile surface by adding dilute solution of HCL and dilute solution of HF in sequence, filling gaseous POCL3 at a temperature of between 850 and 920 DEG C, and performing high-temperature dispersion to form a PN junction on the front surface of the cell; filling SiH4 gas and NH3 gas, forming a surface antireflecting film by the chemical vapor deposition, pre-fabricating a nickel alloy mask plate which is provided with grating-shaped holes corresponding to grating-shaped electrode grooves of the silicon chip, making the grating-shaped holes of the mask plate and the grating-shaped electrode grooves justify, and by using printing equipment, pressing silver paste on the front surface in the grating-shaped electrode grooves on the surface of the silicon chip through the grating-shaped holes in a printing mode; and printing an aluminum layer and the silver paste on the back surface, and in a sintering furnace, sintering the aluminum layer and the silver paste at a temperature of between 850 and 950 DEG C by infrared rays to form electrodes. For the solar cell manufactured by the method, the metal is fully contacted wit the silicon chip, and the photoelectric conversion efficiency is high.