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Molybdenum Tungsten Diselenide (MoWSe2) Powder

CAS Number 126414-37-7

2D Semiconductor Materials, Low Dimensional Materials

Product Code M2142C1-500mg
Price $275 ex. VAT

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MoWSe2 Powder, high quality 2D TMBC alloy

Monolayers exhibit strong photoluminescence emission

Molybdenum tungsten diselenide (MoWSe2) is a 2D TMDC alloy. Alloying 2D TMDCs has proven to be an effective way of modulating the band gap because of the good thermodynamic stability (at room temperature) of the alloys.

High Purity Molybdenum Tungsten Diselenide

High Purity

≥99.995% Molybdenum Tungsten Diselenide

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Low Cost 126414-37-7

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Low Cost Molybdenum Tungsten Diselenide

Molybdenum Tungsten Diselenide (MoWSe2) Powder Applications


applications in photodetectors, FETs, LEDs and photovoltaic devices

MoWSe2 monolayers consist of two Se atomic layers and a sandwiched metal (Mo/W) atom layer. The monolayer of MoWSeshows alternating atomic arrangement of Mo and Se sites in the hexagonal rings, with the Mo atoms partially and randomly substituted by W atoms compared to MoSe2. Like graphite, its interlayers are bound by weak van der Waals.

Structure of Molybdenum Tungsten Diselenide Powder

Molybdenum tungsten diselenide (MoWSe2) structure
Crystal structure of molybdenum tungsten diselenide (MoWSe2)

Applications of Molybdenum Tungsten Diselenide Powder

With a tunable band gap and band edge position, thin-layer nanosheets of molybdenum tungsten diselenide have applications in photodetectors, FETs, LEDs and photovoltaic devices such as being applied in hydrogen evolution reactions (HER).


Molybdenum tungsten diselenide powder is obtained via the CVT method, with purity typically in excess of 99.995%.


Molybdenum tungsten diselenide powder is generally used to prepare MoWSe2 quantum dot solutions and nano-platelets by liquid exfoliation, assisted by sonication. High-purity MoWSe2 powder can also be used in chemical vapour deposition to prepare high-quality mono-layer films.

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MoWSe2 monolayers exhibit strong PL emission, indicating its direct band gap nature, while the bilayers and few-layers are indirect band gap semiconductors. Electrical transport measurement reveals n-type semiconducting transport behaviour with a high on/off ratio (>105) for MoWSe2 monolayers.

Literature and Reviews

  • Two-Dimensional Molybdenum Tungsten Diselenide Alloys: Photoluminescence, Raman Scattering, and Electrical Transport, M. Zhang et al., ACS Nano, 8 (7), 7130–7137 (2014); DOI: 10.1021/nn5020566.
  • Structural Phase Transformation in Strained Monolayer MoWSe2 Alloy, A. Apte et al., ACS Nano, 12 (4), 3468–3476 (2018); DOI: 10.1021/acsnano.8b00248.
  • Exciton valley dynamics in monolayer Mo1-xWxSe2 (x = 0, 0.5, 1), J. Ye et al., Appl. Phys. Lett. 111, 152106 (2017); doi: 10.1063/1.4995517.
  • Persistent photoconductivity in two-dimensional Mo1!xWxSe2–MoSe2 van der Waals heterojunctions, X. Li et al., J. Mater. Res., 31 (7), 923-930 (2016); DOI: 10.1557/jmr.2016.35.
  • Local Conduction in MoxW1–xSe2: The Role of Stacking Faults, Defects, and Alloying, P. Bampoulis et al., ACS Appl. Mater. Interfaces, 10 (15), 13218–13225 (2018); DOI: 10.1021/acsami.8b01506.

Technical Data

CAS Number 126414-37-7
Chemical Formula MoWSe2
Molecular Weight 297.83 g/mol
Bandgap ~1.56 to 1.65 eV [1]
Preparation Synthetic - Chemical Vapour Transport (CVT)
Structure Hexagonal
Electronic Properties 2D Semiconductor
Melting Point N/A
Colour Black
Classification / Family Transition metal dichalcogenides (TMDCs) alloy, 2D semiconductor materials, Nano-electronics, Nano-photonics, Materials science

Product Details

Form Purity
Powder ≥99.995%

MSDS Document

Molybdenum tungsten diselenide MSDS SheetMolybdenum tungsten diselenide

Pricing Table

Product Code Form Quantity Price
M2142C1 Powder 500 mg £220
M2142C1 Powder 1 g £360

To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

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