Single-step chemical vapour deposition of anti-pyramid MoS2/WS2vertical heterostructures

Xueyin Bai*, Shisheng Li, Susobhan Das, Luojun Du, Yunyun Dai, Lide Yao, Ramesh Raju, Mingde Du, Harri Lipsanen, Zhipei Sun

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Van der Waals heterostructures are the fundamental building blocks of electronic and optoelectronic devices. Here we report that, through a single-step chemical vapour deposition (CVD) process, high-quality vertical bilayer MoS2/WS2 heterostructures with a grain size up to ∼60 μm can be synthesized from molten salt precursors, Na2MoO4 and Na2WO4. Instead of normal pyramid vertical heterostructures grown by CVD, this method synthesizes an anti-pyramid MoS2/WS2 structure, which is characterized by Raman, photoluminescence and second harmonic generation microscopy. Our facile CVD strategy for synthesizing anti-pyramid structures unveils a new synthesis route for the products of two-dimensional heterostructures and their devices for application.

Original languageEnglish
Pages (from-to)4537-4542
Number of pages6
JournalNanoscale
Volume13
Issue number8
DOIs
Publication statusPublished - 28 Feb 2021
MoE publication typeA1 Journal article-refereed

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