Silicon wafer, preparation method thereof and solar cell

The invention discloses a silicon wafer, a preparation method thereof and a solar cell, the surface of the silicon wafer is of a scraggly structure, and the surface of the scraggly structure is provided with a suede. By arranging the scraggly line mark surface on the surface of the silicon wafer, the specific surface area of the surface of the silicon wafer is increased, and then the textured surface is arranged on the fluctuating line mark surface, so that the number of similar pyramids on the surface of the silicon wafer is greatly increased, the short-circuit current of the solar cell is increased, and the light conversion efficiency of the solar cell is improved. 本发明公开了硅片及其制备方法和太阳能电池，所述硅片的表面为凸凹不平的结构，所述凸凹不平的结构表面设有绒面。通过在硅片表面设置凸凹不平的线痕面，使硅片表面的比表面积增大，再在起伏的线痕面上设置绒面，从而使硅片表面的类金字塔数量大幅增多，从而增大了太阳能电池片的短路电流，提升了太阳能电池片的光转换效率。