Silicon solar cell sintering process

Abstract

The invention discloses a silicon solar cell sintering process, which comprises the following steps of performing texturing, diffusion, phospho silicate glass (PSG) removal, plasma enhanced chemical vapor deposition (PECVD) and back electrode printing on solar cells in sequence, drying, printing an aluminum back surface field, drying, and printing positive electrodes; turning the solar cells printed with the positive electrodes by 180 degrees, and putting the positive electrodes printed on the solar cells on a sintering furnace zone downwards; putting the solar cells on the sintering furnace zone into a sintering furnace for drying and sintering; and testing and sorting the sintered solar cells.

Description

Technical field: [0001] The invention relates to a silicon solar cell sintering process. Background technique: [0002] With the fierce competition in the photovoltaic market, the price of battery chips has dropped again and again, resulting in the frequent closure of domestic battery factories. The production cost of cells mainly depends on the price of silicon wafers and the price of front-side silver paste, so reducing the amount of silver paste used in a single cell will greatly reduce the production cost of cells; on the other hand, the conversion rate of cells is affected by the structure of grid lines The higher and narrower the grid line, the higher the conversion rate. That is to say, the ideal state is that the minimum width of the thin grid line of the cell can reach a certain height at the same time, and the particle size of the front-side silver paste has reached what can be achieved at present. Due to the limit of production, it is no longer possible to change...

AI Technical Summary

Problems solved by technology

The production cost of cells mainly depends on the price of silicon wafers and the price of front-side silver paste, so reducing the amount of silver paste used in a single cell will greatly reduce the production cost of cells; on the other hand, the conversion rate of cells is affected by the structure of grid lines The higher and narrower the grid line, the higher the conversion rate. That is to say, the ideal state is that the minimum width of the thin grid line of the cell can reach a certain height at the same time, and the particle size of the front-side silver paste has reached what can be achieved at present. Due to the limit of production, it is no longer possible to change the structure of the grid line by changing the particle size of the front silver paste, so the development of the silicon solar cell industry is directly restricted, which affects the technological upgrading of cell production