Resonant silicon nanoparticles for enhancement of light absorption and photoluminescence from hybrid perovskite films and metasurfaces.

摘要: Recently, hybrid halide perovskites have emerged as one of the most promising types materials for thin-film photovoltaic and light-emitting devices because their low-cost potential high efficiency. Further boosting performance without detrimentally increasing complexity architecture is critically important commercialization. Despite a number plasmonic nanoparticle based designs having been proposed solar cell improvement, inherent optical losses nanoparticles reduce photoluminescence from perovskites. Here we use low-loss high-refractive-index dielectric (silicon) improving properties organo-metallic perovskite (MAPbI3) films metasurfaces to achieve strong enhancement well useful light absorption. As result, observed experimentally 50% intensity layer with silicon 200% nanoimprinted metasurface on top. Strong increase in absorption also demonstrated described by theoretical calculations. Since both fabrication/deposition nanoimprinting techniques are low-cost, believe that developed all-dielectric approach paves way novel scalable highly effective metadevices.