FLATTENED LIGHT SCATTERING SUBSTRATE IN THIN-FILM SILICON SOLAR CELLS FOR IMPROVED INFRARED RESPONSE AND PHOTOVOLTAIC PEFORMANCE

摘要

Surface texturing is a technique commonly used to enhance light absorption in thin-film silicon solarcells; it should be noted that highly textured substrates often induce structural defects in the active layer, whichdeteriorates the photovoltaic performance. In this paper, we propose a flattened light-scattering substrate (FLiSS)with a large refractive index contrast in plane as an approach to overcome this trade-off. A FLiSS composed of a 2DZnO grating and a Ag reflector is applied to μc-Si:H cells, in order to improve the spectral response in the IR regionwhile maintaining a high V_(OC) and FF.