Near Sub-Wavelength Texturization of Silicon Surfaces For Solar Cell Applications

Anti-reflection coatings (ARC) of dielectrics help in balancing the refractive index mismatch between silicon and air as result reducing the reflection losses but they do not cause bending of light rays which is essential for efficient light trapping of the injected light into the cell. Texturiaztion helps in both the reduction of reflection losses and light trapping due to bending of the light into a distribution of angles thereby increasing the path length of the light within the absorbing layer. In this paper, we report a simple process for texturiaztion of the silicon surface where the pyramid structures are near about sub wavelength structure (NSWS) but It overcome the contact problem due to nanoteturization. It is to be noted that this technique may well be used for both thick and thin silicon solar cells.