The effects of different parameters of pyramidal textured silicon surface on the optical reflectance

• A numerical algorithm was developed to calculate the weighted reflectance.
• The weighted reflectance of textured surface was drawn within different conditions.
• The optimized parameters of the structure and the best incident angle was obtained.

The effects of different light trapping structure, as formed on the surface of silicon solar cells to increase the light trapping efficiency, are different on the optical reflectance and absorptance. The aim of this paper is to study the effects of the incident angle and pyramidal textured surface formed mechanically on the light trapping efficiency. The base angle size can be controlled mechanically to break through the limitation of crystal structure, and a fillet on the included angle between neighboring pyramidal structures was obtained unavoidable. A numerical algorithm was developed to calculate the weighted reflectance of different structure in this work. Every light transmission process was tracked and the weighted reflectance was calculated numerically. Then the light trapping efficiency of the pyramid texture with different parameters was obtained and analyzed. The weighted reflectance in changed conditions was calculated respectively. By analyzing the values, the optimized parameters of the pyramid texture were proposed, and the best incident angle was obtained.