Premium
Rational Kinetics Control toward Universal Growth of 2D Vertically Stacked Heterostructures
Author(s) -
Li Fang,
Feng Yexin,
Li Ziwei,
Ma Chao,
Qu Junyu,
Wu Xueping,
Li Dong,
Zhang Xuehong,
Yang Tiefeng,
He Yunqiu,
Li Honglai,
Hu Xuelu,
Fan Peng,
Chen Ying,
Zheng Biyuan,
Zhu Xiaoli,
Wang Xiao,
Duan Xiangfeng,
Pan Anlian
Publication year - 2019
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201901351
Subject(s) - heterojunction , nucleation , materials science , chalcogenide , kinetics , nanotechnology , diffusion , semiconductor , transmission electron microscopy , chemical physics , optoelectronics , chemistry , thermodynamics , physics , organic chemistry , quantum mechanics
The rational control of the nucleation and growth kinetics to enable the growth of 2D vertical heterostructure remains a great challenge. Here, an in‐depth study is provided toward understanding the growth mechanism of transition metal dichalcogenides (TMDCs) vertical heterostructures in terms of the nucleation and kinetics, where active clusters with a high diffusion barrier will induce the nucleation on top of the TMDC templates to realize vertical heterostructures. Based on this mechanism, in the experiment, through rational control of the metal/chalcogenide ratio in the vapor precursors, effective manipulation of the diffusion barrier of the active clusters and precise control of the heteroepitaxy direction are realized. In this way, a family of vertical TMDCs heterostructures is successfully designed. Optical studies and scanning transmission electron microscopy investigations exhibit that the resulting heterostructures possess atomic sharp interfaces without apparent alloying and defects. This study provides a deep understanding regarding the growth mechanism in terms of the nucleation and kinetics and the robust growth of 2D vertical heterostructures, defining a versatile material platform for fundamental studies and potential device applications.