Heterogeneous Defect Domains in Single‐Crystalline Hexagonal WS2

Single‐crystalline monolayer hexagonal WS2 is segmented into alternating triangular domains: sulfur‐vacancy (SV)‐rich and tungsten‐vacancy (WV)‐rich domains. The WV‐rich domain with deep‐trap states reveals an electron‐dedoping effect, and the electron mobility and photoluminescence are lower than t...

Full description

Saved in:
Bibliographic Details
Published in:Advanced materials (Weinheim) 2017-04, Vol.29 (15), p.n/a
Main Authors: Jeong, Hye Yun, Jin, Youngjo, Yun, Seok Joon, Zhao, Jiong, Baik, Jaeyoon, Keum, Dong Hoon, Lee, Hyun Seok, Lee, Young Hee
Format: Article
Language:English
Subjects:
chalcogen vacancies
Crystal structure
defect states
defect‐induced strain
Doping
Electron mobility
hexagonal WS2
Lattice vacancies
Materials science
metal vacancies
Photoluminescence
Single crystals
Sulfur
Tungsten disulfide
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Single‐crystalline monolayer hexagonal WS2 is segmented into alternating triangular domains: sulfur‐vacancy (SV)‐rich and tungsten‐vacancy (WV)‐rich domains. The WV‐rich domain with deep‐trap states reveals an electron‐dedoping effect, and the electron mobility and photoluminescence are lower than those of the SV‐rich domain with shallow‐donor states by one order of magnitude. The vacancy‐induced strain and doping effects are investigated via Raman and scanning photoelectron microscopy.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201605043