Manufacturing method of low-consumption silver heterojunction solar cell

Abstract

The invention discloses a manufacturing method of a low-silver-consumption heterojunction solar cell, which comprises the following steps of: A, preparing a heterojunction solar cell on which a metal grid line is to be formed; b, respectively forming a first silver paste electrode fine grid line and a second silver paste electrode fine grid line on the first main surface and the second main surface of the heterojunction solar cell obtained in the step A by using silver paste with the silver content of 90-97%; and C, respectively forming a first silver paste electrode main grid line and a second silver paste electrode main grid line on the first main surface and the second main surface of the heterojunction solar cell treated in the step B by adopting silver-copper slurry, nickel slurry, copper slurry or silver slurry with the silver content of 30-60%. According to the manufacturing method of the low-consumption silver heterojunction solar cell, the conductivity of the electrode and the welding capacity between the electrode and the welding strip can be guaranteed, meanwhile, the use amount of silver paste is greatly reduced, and therefore the cost of the grid line electrode of the cell is reduced, and the production cost of a solar cell piece is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a method for manufacturing low-consumption silver heterojunction solar cells. Background technique [0002] With the development of new energy, the photovoltaic industry, as the main force of new energy development, has the characteristics of continuous regeneration and no pollution to the environment. Therefore, solar cell technology has attracted much attention, especially high-efficiency solar cell technology. The production of solar cells generally consists of processes such as texturing, PN junction, sputtering anti-reflection film, screen printing, and sintering. When sunlight shines on a solar cell, multiple electron-hole pairs will be formed in the semiconductor. The electron-hole pairs form electrons and holes through the photovoltaic effect, and the separated electrons move to N-type amorphous silicon. On the thin film, the holes move to the P-type amorphous silico...

AI Technical Summary

Problems solved by technology

Silver paste is generally printed on the front and back of heterojunction solar cells as electrode grid lines. Due to the high cost of low-temperature silver paste, the consumption of silver paste greatly increases the production cost of heterojunction solar cells.

Images