Ligand-variant two-dimensional halide perovskite lateral heterostructure

The perovskite heterostructure is a novel semiconducting building block that contains multiple spatially organized functionalities within individual particles. The structurally tunable organic ligands in a two-dimensional (2D) perovskite heterostructure play a central role enhancing the stability and affecting the optical properties. Here, we report the synthesis of ligand-variant 2D perovskite lateral heterostructure nanocrystals, based on the sequential solvent evaporation strategy. The fabricated 2D perovskite heterostructures can tolerate large lattice mismatch in the vertical orientation as much as 16.5 percent. The synthesis strategy can be expanded to various combinations of ligands and halides, yielding a clear interface and tailorable electronic structure. This work presents an important step to further the understanding of the interfacial structure of the 2D perovskite heterostructure and the design of perovskite nanodevices with tailored optoelectronic properties.