Details

Autor(en) / Beteiligte

• Zhang, Zhepeng
• Gong, Yue
• Zou, Xiaolong
• Liu, Porun
• Yang, Pengfei
• Shi, Jianping
• Zhao, Liyun
• Zhang, Qing
• Gu, Lin
• Zhang, Yanfeng

Titel

Epitaxial Growth of Two-Dimensional Metal–Semiconductor Transition-Metal Dichalcogenide Vertical Stacks (VSe2/MX2) and Their Band Alignments

Ist Teil von

• ACS nano, 2019-01, Vol.13 (1), p.885-893

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2019

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Two-dimensional (2D) metal–semiconductor transition-metal dichalcogenide (TMDC) vertical heterostructures play a crucial role in device engineering and contact tuning fields, while their direct integration still challenging. Herein, a robust epitaxial growth method is designed to construct multiple lattice-matched 2D metal–semiconductor TMDC vertical stacks (VSe2/MX2, M: Mo, W; X: S, Se) by a two-step chemical vapor deposition method. Intriguingly, the metallic VSe2 preferred to nucleate and extend from the energy-favorable edge site of the semiconducting MX2 underlayer to form VSe2/MX2 vertical heterostructures. This growth behavior was also confirmed by density functional theory calculations of the initial adsorption of VSe2 adatoms. In particular, the formation of Schottky-diode or Ohmic contact-type band alignments was detected for the stacks between VSe2 and p-type WSe2 or n-type MoSe2, respectively. This work hereby provides insights into the direct integration, band-alignment engineering, and potential applications of such 2D metal–semiconductor stacks in next-generation electronics, optoelectronic devices, and energy-related fields.