Direct Vapor Growth of 2D Vertical Heterostructures with Tunable Band Alignments and Interfacial Charge Transfer Behaviors.

ABSTRACT: 2D vertical van der Waals (vdW) heterostructures with atomically sharp interfaces have attracted tremendous interest in 2D photonic and optoelectronic applications. Band alignment engineering in 2D heterostructures provides a perfect platform for tailoring interfacial charge transfer behaviors, from which desired optical and optoelectronic features can be realized. Here, by developing a two-step chemical vapor deposition strategy, direct vapor growth of monolayer PbI₂ on monolayer transition metal dichalcogenides (TMDCs) (WS₂, WSe₂, or alloying WS_{2(1- x )}Se_{2 x} ), forming bilayer vertical heterostructures, is demonstrated. Based on the calculated electron band structures, the interfacial ba

SUBMITTER: Zheng W 

PROVIDER: S-EPMC6446596 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature