An Effective Route for the Growth of Multilayer MoS2 by Combining Chemical Vapor Deposition and Wet Chemistry

Author:

Almohaimeed Ziyad M.1ORCID,Karamat Shumaila2ORCID,Akram Rizwan1ORCID,Sarwar Saira2ORCID,Javaid Asad2ORCID,Oral Ahmet3ORCID

Affiliation:

1. Department of Electrical Engineering, College of Engineering, Qassim University, P. O. Box 6677, Buraydah 51452, Saudi Arabia

2. Laser Spectroscopy and Materials Synthesis Laboratory, Department of Physics, COMSATS University, Islamabad 54000, Pakistan

3. Department of Physics, Middle East Technical University, Ankara 06800, Turkey

Abstract

Molybdenum disulfide (MoS2) is an actively pursuing material of the 2D family due to its semiconducting characteristics, making it a potential candidate for nano and optoelectronics application. MoS2 growth from molybdenum and sulphur precursors by chemical vapor depositions (CVD) is used widely, but molybdates’ conversion into MoS2 via CVD is overlooked previously. Direct growth of MoS2 on the desired pattern not only reduces the interfacial defects but also reduces the complexities in device fabrication. In this work, we combine the wet synthesis and chemical vapor deposition method where sodium molybdate and L-cysteine are used to make a solution. With the dip coating, the mixture is coated on the substrates, and then, chemical vapor deposition is used to convert the chemicals into MoS2. Raman spectroscopy revealed the presence of oxysulphides (peaks number value) other than A 1 g and E 2 g 1 , where heat treatment was performed in the presence of Ar gas flow only. On the other hand, the films reducing in the presence of sulphur and argon gas promote only A 1 g and E 2 g 1 peaks of MoS2, which confirms complete transformation. XRD diffraction showed a very small change in the diffraction peaks and value of strain, whereas SEM imaging showed the flakes formation for MoS2 samples which were heated in the presence of sulphur. X-ray photoelectron spectroscopy is also performed for the chemical composition and to understand the valence state of Mo, S, and O and other species.

Funder

Qassim University

Publisher

Hindawi Limited

Subject

Condensed Matter Physics

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