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NANOIMPRINTED HYBRID PEROVSKITE METASURFACES WITH IMPROVED EMISSION
Abstract
The main purpose of the research is investigating approaches of nanostructural perovskite obtaining. We used wide known methods, which used for studying microstructure and electronics properties such as atom-force and scanning electron microscope, X-ray diffraction method. The major findings of the research are following: recent developments in the physics of high-index resonant dielectric nanostructures suggest alternative mechanisms for subwavelength light control driven by Mie resonances with strong magnetic response that can be employed for a design of novel optical metasurfaces. Here we demonstrate metasurfaces based on nanoimprinted perovskite films optimized by alloying the organic cation part of perovskites. We reveal that such metasurfaces can exhibit a significant enhancement of both linear and nonlinear photoluminescence (up to 70 times) combined with advanced stability. Our results suggest a cost-effective approach based on nanoimprint lithography and combined with simple chemical reactions for creating a new generation of functional metasurfaces which may pave a way towards highly efficient planar optoelectronic metadevices. this class of materials revolutionized the field of photovoltaics, where on the basis of it the efficiency level of 23.3% has already been achieved, which approaches much more expensive analogs based on silicon. Also, based on perovskites, light-emitting diodes can be created due to their excellent luminescent properties. Perovskite-based light-emitting diodes can be made in the wavelength range of all visible radiation, and the spectrum will almost not depend on the size of the element, but only on the properties of the material itself. The ability of perovskites to absorb light is also used to make effective photodetectors.
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