Enhancement of photovoltaic absorption in thin-film silicon solar cells by all-dielectric light-trapping and antireflective coatings

Abstract

We study the efficiency of several types of all-dielectric light-trapping and antireflective coatings for the enhancement of photovoltaic absorption in thin-film silicon solar cells. We compare the photovoltaic absorption enhancement offered by a square array of nanovoids in the dielectric covering of the cell with that granted by a flat blooming layer, and a densely packed array of dielectric nanospheres.