Towards nano-patterned perovskite layers for enhanced absorption in solar cells

Organo-metal halide perovskites have revolutionized thin film photovoltaics by their outstanding performance improvements over the last years. Modifying the active layer by thermal nano-imprint lithography enables a great opportunity to modify and further enhance the optical properties. During the imprint, the perovskite layer changes tremendously. Crystal sizes and structure can be controlled by different molds, pressure and heat. Most importantly, the ability to transfer two-dimensional photonic structures inside the active layer enables enhanced photon absorption in the weakly absorbing wavelength region of thin perovskites.