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Product Code M2171F11-1EA
Price $525 ex. VAT

High purity tungsten disulfide monolayer film

For applications in electronic and optoelectronic devices

Technical Data | Applications | MSDS | Literature and Reviews | Related Products | Resources and Support

Tungsten disulfide (WS2, CAS number 12138-09-9) 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. WS2 monolayer thickness has been reported at ~ 0.7 - 1 nm.

High Purity Tungsten Disulfide

High Purity

>99% Tungsten Disulfide Purity

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Low Cost 12138-09-9

Low Cost

Low Cost Tungsten Disulfide

Applications of Tungsten Disulfide


Applications in electronic and optoelectronic devices

Technical Data

CAS Number 12138-09-9
Chemical Formula WS2
Molecular Weight 247.97 g/mol
Bandgap 1.4 - 2.01 eV
Synonyms Tungsten sulphide, Tungsten sulfide, Tungsten(IV) sulfide
Classification / Family Transition metal dichalcogenides (TMDCs), 2D semiconductor materials, Nano-electronics, Nano-photonics, Materials science

Product Details

Substrate Sapphire
Product Code M2171F11
Size 1 cm × 1 cm*
Growth Method CVD synthesis
Appearance Transparent
Purity >99%
Transparency >97%
Coverage >95%
Number of Layers 1
Sheet Resistance N/A
Transfer Method Directly grown
Substrate Thickness 300 µm

*Other sizes available: up to 2 cm × 2 cm or 2 inches in diameter.

High-quality tungsten disulfide (WS2) monolayer films are available on Sapphire as standard. Different substrates of monolayer WSfilms, including SiO2/SiGlass, Silicon and Quartz are also available via custom order. 

Discontinuous isolated triangular crystals (crystal islands) films are also available via custom request. Please contact us for more information regarding custom products.

Pricing Table

Product Code Substrate Size Quantity (EA) Price
M2171F11 Sapphire 1 cm × 1 cm 1 £420


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.


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


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 Document

Tungsten Disulfide Monolayer Film MSDSTungsten disulfide monolayer film

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.

We stock a wide range of 2D materials available to purchase online. Please contact us if you cannot find what you are looking for.

Resources and Support

Viscoelastic Transfer of 2D Material Using PDMS

Viscoelastic transfer using polydimethylsiloxane (PDMS) stamps is one of the methods used for the deterministic placement of 2D materials and the fabrication of van der Waals heterostructures. It relies on the viscoelasticity of PDMS, which behaves as an elastic solid on short time scales, but as a viscous fluid on long time scales.

Learn more...
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