Study on the surface cleaning process of polysilicon fleece after diamond wire cutting

Abstract

In the texturing process of diamond wire polycrystalline silicon solar cells optimizing the preparation of the light-trapping texture structure needs to add texturing additives. In this thesis, the phenomenon which additives remain on the surface of the silicon wafer was found through the contact angle test. The texturing silicon wafer are cleared by ultrasound with water and absolute ethanol respectively, and the change of contact angle was used to verify the cleaning effect of the two cleaning processes. The research results show that additives remain on the surface of the texturing silicon wafer, and ultrasonic cleaning with absolute ethanol can significantly improve the cleanliness of the flock sheet.