Higher values of spectral response, absorption coefficient and external quantum efficiency of solar cell in the form of pyramids

This paper presents a study on spectral response, absorption coefficient and external quantum efficiency of solar cell in the form of pyramid. We investigate to what extent and under what conditions we want to take advantage of ray incidence seven times. It is found that these analyses can be used to determine the optimal surface texture which provides the best light trapping for solar cells in terms of the total internal reflection occurring in the high-index medium at incidence angles larger than the nominal critical angle. One of the main contributions of this paper is the analysis and quantification of the influence of the opening between the heads of the two closest pyramids in textured surface for solar cells and its application on the photovoltaic parameters. In this model we show that the material can have seven successive incident ray absorptions instead of five currently, where we changed the direction of the reflected ray, by identifying and installing the angle between the two neighbouring pyramids, the incidence angle, the opening between the heads of the two closest pyramids and their height. Thus, with an angle between the two neighbouring pyramids fixed at 12° and for angle of incidence fixed at 84°, the opening between the heads of the two closest pyramids is fixed at 2.10 μm for a pyramid height of 10 μm. This leads to the largest possible increase in optical efficiency, such as spectral response, absorption coefficient and external quantum efficiency. The results are in good agreement with the available literature.