In:
Nature Communications, Springer Science and Business Media LLC, Vol. 13, No. 1 ( 2022-02-23)
Abstract:
The precise precursor supply is a precondition for controllable growth of two-dimensional (2D) transition metal dichalcogenides (TMDs). Although great efforts have been devoted to modulating the transition metal supply, few effective methods of chalcogen feeding control were developed. Here we report a strategy of using active chalcogen monomer supply to grow high-quality TMDs in a robust and controllable manner, e.g., MoS 2 monolayers perform representative photoluminescent circular helicity of ~92% and electronic mobility of ~42 cm 2 V −1 s −1 . Meanwhile, a uniform quaternary TMD alloy with three different anions, i.e., MoS 2(1- x - y ) Se 2 x Te 2 y , was accomplished. Our mechanism study revealed that the active chalcogen monomers can bind and diffuse freely on a TMD surface, which enables the effective nucleation, reaction, vacancy healing and alloy formation during the growth. Our work offers a degree of freedom for the controllable synthesis of 2D compounds and their alloys, benefiting the development of high-end devices with desired 2D materials.
Type of Medium:
Online Resource
ISSN:
2041-1723
DOI:
10.1038/s41467-022-28628-7
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2022
detail.hit.zdb_id:
2553671-0
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