3D-Architected Alkaline-Earth Perovskites.

3D ceramic architectures are increasingly sought after for optical applications due to their unique geometric properties. Prior research has demonstrated the potential of such structures in light manipulation and refractive control. However, the fabrication of complex alkaline-earth perovskite geometries remains a challenge. Existing methods often lack the precision needed for micro- and nanoscale features. This gap motivated the development of a new approach for 3D printing perovskite materials. The need for scalable and customizable fabrication techniques is evident in the field. Alkaline-earth perovskites offer unique optical and structural characteristics. Yet, their full potential in micro-optics has not been fully realized. This study addresses the need for advanced manufacturing of perovskite-based ceramics.

The aim of this work is to develop a method for 3D printing alkaline-earth perovskite microarchitectures. The study focuses on creating custom photoresists for two-photon lithography. This technique allows for the fabrication of complex 3D geometries with high precision. The goal is to enable the production of structures with micrometric and nanometric features. The researchers propose to explore the optical properties of these materials. The motivation stems from the demand for high-refractive-index ceramics in micro-optics. The study also seeks to investigate the structural and chemical characteristics of the printed perovskites. These findings may contribute to applications in (photo/electro)catalysis and other fields.

The study employs an additive manufacturing approach using two-photon lithography. Custom photoresists are developed to suit the printing of alkaline-earth perovskites. The method allows for the creation of 3D structures such as octet-truss lattices and gyroids. The researchers use this technique to fabricate BaZrO3, CaZrO3, and SrZrO3 architectures. The printed structures include shapes inspired by sodalite zeolite and C60 buckyballs. Morphological, structural, and chemical analyses are conducted to evaluate the printed materials. Cathodoluminescence and wide-field photoluminescence are used to assess optical properties. These methods help estimate the lifetime rate and defect density in the perovskites.

The developed method successfully produces 3D microarchitectures of alkaline-earth perovskites. The printed structures exhibit micrometric and nanometric feature sizes. The researchers observe that the photoresists enable high-resolution printing of complex geometries. Cathodoluminescence measurements reveal insights into the optical behavior of the materials. Wide-field photoluminescence data indicate variations in defect density among the perovskites. The study reports that BaZrO3, CaZrO3, and SrZrO3 show distinct optical characteristics. These findings suggest that the structures may be suitable for micro-optics applications. The results demonstrate the feasibility of using AM for producing mixed oxide ceramics.

The study concludes that the developed AM method is effective for printing 3D perovskite structures. The researchers propose that the approach allows for the fabrication of high-refractive-index ceramics. The optical properties of the printed materials suggest potential for use in micro-optics. The study highlights the importance of structural and chemical characterization in assessing performance. The findings may support future work in (photo/electro)catalysis and other applications. The researchers suggest that the method could be extended to other mixed oxide systems. The study emphasizes the need for further investigation into the long-term stability of the structures. These conclusions are based on the observed optical and structural properties of the printed perovskites.