Ultralow contact resistance between semimetal and monolayer semiconductors

Nature · 2021 · 1319 citations

• Materials science
• Optoelectronics
• Nanotechnology

Two-dimensional halide perovskite lateral epitaxial heterostructures

Nature · 2020 · 458 citations

• Materials science
• Optoelectronics
• Nanotechnology

. Here we report an effective strategy to substantially inhibit in-plane ion diffusion in two-dimensional halide perovskites by incorporating rigid π-conjugated organic ligands. We demonstrate highly stable and tunable lateral epitaxial heterostructures, multiheterostructures and superlattices. Near-atomically sharp interfaces and epitaxial growth are revealed by low-dose aberration-corrected high-resolution transmission electron microscopy. Molecular dynamics simulations confirm the reduced heterostructure disorder and larger vacancy formation energies of the two-dimensional perovskites in the presence of conjugated ligands. 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.

Atomically precise single-crystal structures of electrically conducting 2D metal–organic frameworks

Nature Materials · 2020 · 446 citations

• Materials science
• Chemical physics
• Crystallography

Enhancement of van der Waals Interlayer Coupling through Polar Janus MoSSe

Journal of the American Chemical Society · 2020 · 162 citations

• Chemistry
• Condensed matter physics
• Chemical physics

counterparts. Our noncontact ultralow-frequency Raman probe, linear chain model, and density functional theory calculations confirm the enhancement and reveal the origins as charge redistribution in Janus MoSSe and reduced interlayer distance. Our results uncover the potential of tuning interlayer coupling strength through Janus heterostacking.