Science Daily April 29, 2020
Inherently soft crystal lattice of Halide perovskites allows greater tolerance to lattice mismatch, making them promising for heterostructure formation and semiconductor integration. However, their high intrinsic ion mobility, which leads to interdiffusion and large junction widths and their poor chemical stability, epitaxial growth of atomically sharp heterostructures of halide perovskites has not yet been achieved. An international team of researchers (USA – Perdue University, MIT, UC Berkeley, Lawrence Berkeley National Laboratory, China) has developed a strategy to substantially inhibit in-plane ion diffusion in two-dimensional halide perovskites by incorporating rigid Ï€-conjugated organic ligands. They have demonstrated highly stable and tunable lateral epitaxial heterostructures, multiheterostructures and superlattices with atomically sharp interfaces. These findings demonstrate a materials platform for complex and molecularly thin superlattices, devices and integrated circuits…read more. TECHNICAL ARTICLE