Tungsten Disulfide (WS2) Crystal

CAS Number 12138-09-9

2D Materials, Low Dimensional Materials, Materials, Transition Metal Chalcogenides (TMCs), Transition Metal Dichalcogenides (TMDs), Tungsten Disulfide (WS₂)

MSDS

Tungsten Disulfide (WS2) Crystal CAS 12138-09-9

Tungsten Disulfide Crystal, high purity 2D semiconducting TMDCs material

For applications in light-emitting devices, solar cells, and photodetectors

Like other TMDC family members, tungsten disulfide (WS₂, CAS number 12138-09-9) has a two-dimensional structure. It consists of a layer of hexagonally-arranged tungsten atoms positioned between two layers of hexagonally-arranged sulphur atoms.

Individual layers are held together by Van der Waals forces. This makes it possible for single to few-layer ultra-thin films to be prepared from bulk crystals using mechanical exfoliation techniques. The primitive unit cell of WS₂ consists of one tungsten atom and two sulphur atoms, arranged in a trigonal prismatic configuration.

High Purity

≥99.999% Crystal Purity

2D Semiconductor

2D semiconducting TMDCs material

Low Cost

Low Cost Tungsten Disulfide

Applications

Used to prepare monolayer and few-layer

With a photoluminescence (PL) quantum yield that is almost two orders of magnitude higher at room temperature than MoS₂, WS₂is one of the most popular 2D semiconducting TMDCs materials, and is widely explored for applications in light-emitting devices, solar cells, and photodetectors.

Technical Data

CAS Number	12138-09-9
Chemical Formula	WS₂
Molecular Weight	247.97 g/mol
Bandgap	1.4 - 2.01 eV [1]
Preparation	Synthetic - Chemical Vapour Transport (CVT)
Structure	Hexagonal
Electronic Properties	2D semiconductor
Melting point	1250 °C (lit.)
Colour	Black
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

Form	Purity
Crystal	≥99.999%

Pricing Table

Product Code	Form	Size*	Quantity (EA)	Price
M2110A10	Crystal	Small (≥10 mm²)	1	£520
M2110A25	Crystal	Medium (≥25 mm²)	1	£850
M2110A00	Crystal	Large** (≥100 mm²)	1	£1750

*Typical representative size, areas/dimensions may vary

**Item with a lead time of 2 - 3 weeks, please contact for more information

MSDS Document

Tungsten disulfide crystal

Structure of Tungsten Disulfide Crystal

Applications of Tungsten Disulfide Crystal

In the form of single or few-layer thin films, exfoliated WS₂ nanosheets find applications ranging from light emitters, field effect transistors (FETs) and photovoltaics. Like many other TMDCs, they are actively used in condensed matter physics and photonics research.

Synthesis

Tungsten disulfide WS₂ is manufactured using chemical vapour transport (CVT) crystallisation, with crystals having a purity in excess of 99.999%.

Usage

Tungsten disulfide WS₂ can be used to prepare monolayer and few-layer WS₂ by mechanical or liquid exfoliation.

Literature and Reviews

Controlled Synthesis and Transfer of Large-Area WS2 Sheets: From Single Layer to Few Layers, A. Elı´as et al., ACS Nano, 7 (6), 5235–5242 (2013); DOI: 10.1021/nn400971k.
Extraordinary Room-Temperature Photoluminescence in Triangular WS2 Monolayers, H. R. Gutiérrez et al., Nano Lett., 13 (8), 3447–3454 (2013); DOI: 10.1021/nl3026357.
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.

Photosensor Device Based on Few-Layered WS2 Films, N. Perea-López et al., Adv. Funct. Mater., 23, 5511–5517 (2013); DOI: 10.1002/adfm.201300760.
Direct Chemical Vapor Deposition Growth of WS2 Atomic Layers on Hexagonal Boron Nitride, M. Okada et al., ACS Nano, 8 (8), 8273–8277 (2014); DOI: 10.1021/nn503093k.

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