Improving the optical properties of perovskite solar cells: utilizing two-dimensional grating and nanoparticle arrays

We study the effect of different optical phenomena on perovskite solar cells and present a light-trapping scheme to establish relative symmetry at different angles of incidence. The Fabry–Perot resonance, plasmonic effects, and guided mode excitation are used in this research. The scheme consists of two-dimensional grating and nanoparticle arrays to enhance light trapping inside the structure. We explain the optical effects that occur in the structure with theoretical frameworks and also validate our theoretical expectations with simulation results. Our proposed structure produces higher photocurrent at most incident angles than other reference structures.