Formation of ordered perovskite nanostructures by nanoimprinting

A new universal method for synthesizing ordered nanostructures from the halide perovskite CsPbBr$_3$ using nanoimprinting is proposed and experimentally implemented. This method enables the formation of extended (up to 25 mm$^2$) homogeneous regions containing two types of perovskite structures: ordered arrays of isolated nanoparticles and microflakes with a nanostructured surface. A study of the optical properties of the synthesized samples using photoluminescence microspectroscopy revealed narrow resonance emission peaks at 523 nm for the particle array and 525 nm for the flakes (the spectral linewidths at half-maximum were 19 and 21 nm, respectively). The photoluminescence intensity from the flakes is significantly higher, which is determined by the total volume of the perovskite material.