Controlled Synthesis of Organic/Inorganic van der Waals Solid for Tunable Light-matter Interactions

TL;DR

This paper reports the controlled synthesis of organic/inorganic van der Waals solids, demonstrating tunable light emission properties and potential for advanced optoelectronic applications.

Contribution

It introduces a scalable vapor deposition method to create high-quality organic/inorganic vdW solids with tailored optical properties.

Findings

h-BN preserves organic perovskite's optical properties

Organic/h-BN vdW arrays enable red light emission

Different 2D monolayers dramatically affect vdW solid behavior

Abstract

Van der Waals (vdW) solids, as a new type of artificial materials that consist of alternating layers bonded by weak interactions, have shed light on fascinating optoelectronic device concepts. As a result, a large variety of vdW devices have been engineered via layer-by-layer stacking of two-dimensional materials, although shadowed by the difficulties of fabrication. Alternatively, direct growth of vdW solids has proven as a scalable and swift way, highlighted by the successful synthesis of graphene/h-BN and transition metal dichalcogenides (TMDs) vertical heterostructures from controlled vapor deposition. Here, we realize high-quality organic and inorganic vdW solids, using methylammonium lead halide (CH3NH3PbI3) as the organic part (organic perovskite) and 2D inorganic monolayers as counterparts. By stacking on various 2D monolayers, the vdW solids behave dramatically different in light emission. Our studies demonstrate that h-BN monolayer is a great complement to organic perovskite for preserving its original optical properties. As a result, organic/h-BN vdW solid arrays are patterned for red light emitting. This work paves the way for designing unprecedented vdW solids with great potential for a wide spectrum of applications in optoelectronics.