Hierarchical Confined Assembly of Bilayer Heterostructures with Programmable Patterns

Hierarchical heterostructures fabricated from several optoelec-tronic materials with different physical properties are the basis for the integration of multifunctional and high-performing micro/nanodevices.Compared with one-component systems, heterostructures with programmablegeometries can effectively control device performance, integrate multiplefunctions, and generate specific applications. However, patterning high-qualityhierarchical heterostructures still faces difficulties in regard to solutionprocessing, such as the dissolution of prepared structures during multipleprocesses and the uncontrollable assembly behaviors of different materials.Here, we report a universal method for fabricating cross-stacked P3HT/MAPbBr3heterostructure arrays with a large area, homogeneous size, preciseposition, long-range order, and pure crystallographic orientation. Thecontrolled hierarchical dewetting processes are confined by capillary bridgesin the sandwich-structured assembly system, yielding bilayer heterostructure arrays with programmable geometries and tunable positional relationships. Our strategy provides a new perspective for the fabrication of high-throughput and high-efficiency hierarchical heterostructures toward integrated optoelectronics

Automated summary

This study reports a universal method for fabricating cross-stacked P3HT/MAPbBr3 heterostructure arrays with a large area, homogeneous size, precise position, long-range order, and pure crystallographic orientation. The controlled hierarchical dewetting processes are confined by capillary bridges, yielding bilayer heterostructure arrays with programmable geometries and tunable positional relationships.