Optical design considerations of rear-side dielectric for higher efficiency of PERC solar cells.

Higher reflectance of the rear-side dielectric stack, at the wavelength of the laser source used for ablation, reduces laser-induced damage and improves the open-circuit voltage of PERC silicon solar cells. The understanding of this correlation increases the working window of cost-effective nanosecond laser ablation of the rear-side dielectric for higher-efficiency industrial PERC-like solar cells.