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.

General Information

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, 2 inches in diameter, 4 inches in diameter or custom-made sizes)
• Silicon (1 cm × 1 cm, 2 cm × 2 cm, 2 inches in diameter, 4 inches in diameter or custom-made sizes)
• Quartz (1 cm × 1 cm, 2 cm × 2 cm, 2 inches in diameter, 4 inches in diameter or custom-made sizes)
• SiO₂ /Si (1 cm × 1 cm, 2 cm × 2 cm, 2 inches in diameter, 4 inches in diameter or custom-made sizes)
• Copper (1 cm × 1 cm, 2 cm × 2 cm, 2 inches in diameter, 4 inches in diameter or custom-made sizes)

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.

MSDS Documentation

Tungsten disulfide monolayer film MSDS sheet

Pricing

Literature and Reviews

1. 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.
2. 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.
3. 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.
4. Extraordinary Room-Temperature Photoluminescence in Triangular WS2 Monolayers, H. Gutiérrez et al., Nano Lett., 13 (8), 3447–3454 (2013); DOI: 10.1021/nl3026357.
5. 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.
6. 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.
7. 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.

To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.