Our collaborative work (with Prof. Yi Yu group @ShanghaiTech and Prof. Brett Savoie group @Purdue ) entitled “Two-dimensional halide perovskite lateral epitaxial heterostructures” has been published in Nature. Big congratulations!
Halide perovskites are attractive for applications such as solar cells, LEDs, detectors and lasers. Their inherently soft crystal lattice allows greater tolerance to lattice mismatch, making them promising for heterostructure formation and semiconductor integration. Here we report an effective strategy to substantially inhibit in-plane ion diffusion and enhanced stability in two-dimensional halide perovskites by incorporating rigid π-conjugated organic ligands. We demonstrate highly stable and tunable lateral epitaxial heterostructures, multiheterostructures and superlattices with near atomically sharp interfaces. These findings provide insights into the immobilization and stabilization of halide perovskite semiconductors and demonstrate a materials platform for complex and molecularly thin superlattices, devices and integrated circuits.