Molybdenum Tungsten Diselenide (MoWSe2) Powder
CAS Number 126414-37-7
2D Materials, Low Dimensional Materials, Transition Metal Chalcogenides (TMCs), Transition Metal Dichalcogenides (TMDs)
MoWSe2 Powder, high quality 2D TMDC alloy
Monolayers exhibit strong photoluminescence emission
Technical Data | MSDS | Literature and Reviews | Related Products
Molybdenum tungsten diselenide (MoWSe2), CAS number 126414-37-7, 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
≥99.995% Molybdenum Tungsten Diselenide
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Low Cost
Low Cost Molybdenum Tungsten Diselenide
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 MoWSe2 shows 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.
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% |
Pricing Table
Product Code | Form | Quantity | Price |
M2142C1 | Powder | 500 mg | £220 |
M2142C1 | Powder | 1 g | £360 |
MSDS Document
Molybdenum tungsten diselenide
Structure of Molybdenum Tungsten Diselenide Powder
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).
Synthesis
Molybdenum tungsten diselenide powder is obtained via the CVT method, with purity typically in excess of 99.995%.
Usage
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.
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.
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