Heterogeneous Defect Domains in Single-Crystalline Hexagonal WS2.
Single-crystalline monolayer hexagonal WS2is 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.
Center for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS), Suwon, 16419, Republic of Korea.|Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
Hye Yun
HY
Jeong
Center for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS), Suwon, 16419, Republic of Korea.|Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
Youngjo
Y
Jin
Center for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS), Suwon, 16419, Republic of Korea.|Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
Seok Joon
SJ
Yun
Center for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS), Suwon, 16419, Republic of Korea.|Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
Jiong
J
Zhao
Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 790-784, Republic of Korea.
Jaeyoon
J
Baik
Center for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS), Suwon, 16419, Republic of Korea.|Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
Dong Hoon
DH
Keum
Center for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS), Suwon, 16419, Republic of Korea.|Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
Hyun Seok
HS
Lee
Center for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS), Suwon, 16419, Republic of Korea.|Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
Young Hee
YH
Lee
chalcogen vacancies; defect states; defect-induced strain; hexagonal WS2; metal vacancies