Texturing device for solar cell silicon wafer

Abstract

The invention discloses a texturing device for a solar cell silicon wafer. The texturing device comprises a liquid storage tank, a washing tank and a cooling water machine, wherein a liquid outlet and a backflow port are arranged on the liquid storage tank, a liquid inlet and an overflow port are arranged on the washing tank, a diaphragm pump is arranged between the liquid outlet of the liquid storage tank and the liquid inlet of the washing tank, an overflow bypass pipe is arranged between the backflow port of the liquid storage tank and the overflow port of the washing tank, a condensing pipe is arranged in the liquid storage tank, the water inflow end port of the condensing pipe is connected with the water outlet of the cooling water machine, and the water outflow end port of the condensing pipe is connected with the water inlet of the cooling water machine. The texturing device for a solar cell silicon wafer has a simple structure, can effectively stabilize the temperature of a texturing agent, greatly improves the texturing controllability, and can be widely used in texturing equipment for a solar cell silicon wafer.

Description

technical field [0001] The invention relates to a texturing device for silicon wafers of solar cells. Background technique [0002] Solar cells are a new type of energy conversion equipment. Silicon wafers are the core components of solar cells, and their ability to reflect sunlight directly affects the performance of solar cells. Texturing is a process for processing solar silicon wafers. It is the first process in the production of silicon solar cells. The purpose of texturing is to increase the area of ​​the silicon wafer surface that absorbs sunlight and reduce light reflection, thereby improving the photoelectricity of solar cells. conversion efficiency. The texturing process usually includes alkali texturing process and acid texturing process, using low-concentration acid or alkali solution as the texturing agent to corrode the surface of the silicon wafer, so that the surface of the silicon wafer forms a textured surface with a greatly increased surface area. At pre...

AI Technical Summary

Problems solved by technology

For the above-mentioned texturing device, because the silicon chip is continuously textured in the washing tank, the temperature of the texturing agent in the washing tank and the liquid storage tank will continue to rise, and the texturizing agent after the temperature rise in the washing tank will accelerate the process of drying. The corrosion of silicon wafers, the time and effect of texturing are difficult to control

Images