Tungsten Disulfide (WS2) Monolayer Film

Tungsten disulfide (WS₂) monolayer films supersede MoS₂ with their superior optical properties, as measured by photoluminescent quantum yield (PLQY) and line-widths. With even larger spin-orbit coupling and nearly three times larger valence band splitting, WS₂ monolayer films may exhibit larger band edge spin splittings, stronger valley-Hall effect, and magnetic field effects for optoelectronic and spintronic functionalities.

Applications

Tungsten disulfide monolayer films show a much higher photoluminescence efficiency and narrower emission line-width than MoS₂. Monolayer WS₂ films have been widely used in electronic and optoelectronic devices, such as in photovoltaic, FETs, photodetectors, and valleytronic applications.

Synthesis

High-quality tungsten disulfide monolayer films are grown directly on the substrates (sapphire) by the chemical vapour deposition (CVD) method.

Usage

WS₂ monolayer films can be used in research purposes such as microscopic analysis, photoluminescence, and Raman spectroscopy studies. Monolayer WS₂ films can also be transferred to other substrates.

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Technical Data

Product Details

* Other sizes available: 2 cm × 2 cm, or 2 inches in diameter, 4 inches in diameter custom-made sizes. Please contact us for more details.

High-quality tungsten disulfide monolayer film is available as a directly-grown film on sapphire. Different sizes and substrates of monolayer WS₂ films are also available via custom order. Discontinuous isolated triangular crystals (crystal islands) films are also available on request,  please contact us for more details.

• Glass (1 cm × 1 cm, 2 cm × 2 cm or custom-made sizes)
• Silicon (1 cm × 1 cm, 2 cm × 2 cm or custom-made sizes)
• Quartz (1 cm × 1 cm, 2 cm × 2 cm or custom-made sizes)
• SiO₂ /Si (1 cm × 1 cm, 2 cm × 2 cm or custom-made sizes)
• Copper (1 cm × 1 cm, 2 cm × 2 cm or custom-made sizes)

MSDS Document

Tungsten disulfide monolayer film

Pricing Table

Literature and Reviews

• Synthesis and Optical Properties of Large-Area Single-Crystalline 2D Semiconductor WS 2 Monolayer from Chemical Vapor Deposition, C. Cong et al., Adv. Optical Mater., 2, 131–136 (2014); DOI: 10.1002/adom.201300428.
• Large-area synthesis of monolayer WS2 and its ambient-sensitive photo-detecting performance, C. Lan et al, Nanoscale, 7, 5974 (2015); DOI: 10.1039/c5nr01205h.
• Electronic properties of WS, monolayer films, A. Klein et al., Thin Solid Films, 380, 221-223 (2000); DIO: 10.1016/S0040-6090(00)01510-8.
• Extraordinary Room-Temperature Photoluminescence in Triangular WS2 Monolayers, H. Gutiérrez et al., Nano Lett., 13 (8), 3447–3454 (2013); DOI: 10.1021/nl3026357.
• Enhanced Photoluminescence of Monolayer WS2 on Ag Films and Nanowire–WS2–Film Composites, F. Cheng et al., ACS Photonics, 4 (6), 1421–1430 (2017); DOI: 10.1021/acsphotonics.7b00152.
• Controlled Growth of High-Quality Monolayer WS2 Layers on Sapphire and Imaging Its Grain Boundary, Y. Zhang et al., ACS Nano, 7 (10), 8963–8971 (2013); DOI: 10.1021/nn403454e.
• Synthesis and Transfer of Large-Area Monolayer WS2 Crystals: Moving Toward the Recyclable Use of Sapphire Substrates, Z. Xu et al., ACS Nano, 9 (6), 6178–6187 (2015); DOI: 10.1021/acsnano.5b01480.