A general two-step chemical vapor deposition procedure to synthesize highly crystalline transition metal dichalcogenides: A case study of MoS2

Abstract

A green and simple synthesis method based on a two-step chemical vapour deposition approach has been developed to synthesis transition metal dichalcogenides flakes. With non-toxic precursor such as transition metal oxides and elemental sulphur, large-area, strong photoluminescent, and uniform MoS 2 nanoflakes was produced at a relatively low growth temperature (650 °C). Controlling layer number and morphology was achieved only by precursor concentration without any oxide impurity revealed by SEM, PL and Raman spectroscopy. This method can be used to make wide range of metal chalcogenides such as ZnS, SnS 2 , PtS 2 and PdS 2 .

Controllable p-type doping of 2D MoS2via Sodium intercalation for optoelectronics

“…The full width at half maximum (FWHM) of the E 1 2g peak of synthesized ML MoS 2 is B3.3 cm À1 , thus indicating that the MoS 2 film has good crystalline quality. [22][23][24] To identify the composition of NaOH-doped MoS 2 flakes and to further understand the role of NaOH, we performed XPS characterization. Fig.…”

“…The full width at half maximum (FWHM) of the E 1 2g peak of synthesized ML MoS 2 is ∼3.3 cm −1 , thus indicating that the MoS 2 film has good crystalline quality. 22–24…”

Identification of defective two dimensional semiconductors by multifractal analysis: The single-layer MoS2 case study

“…Firstly, these films were grown on a SiO 2 substrate using a CVD method. Then the samples were initially characterized in air using Raman and PL spectroscopy at room temperature [49]. Experiments were performed on films of single layer MoS 2 .…”

Graphene/transition metal dichalcogenides hybrid supercapacitor electrode: status, challenges, and perspectives

“…A critical innovation is highly important for engineering the nanostructure of MoS 2 ; such innovation differs from dimensional morphologies and the corresponding fabrication methods, such as mechanical exfoliation [159], chemical exfoliation [160], hydrothermal synthesis [161], and CVD [162]. The preparation of single-layer nanosheets using the scotch tape technique was the first to apply a micromechanical exfoliation method.…”