WS₂ Crystals

Description

WS₂ Crystals (Tungsten Disulfide)

WS₂ is a layered transition metal dichalcogenide (TMD) with a van der Waals structure, widely known for its outstanding electronic, optical, and catalytic properties. It exhibits a direct bandgap (~2.0 eV) in monolayer form and an indirect bandgap (~1.4 eV) in bulk, making it highly suitable for applications in nanoelectronics, optoelectronics, and energy conversion. Our WS₂ crystals are synthesized using the Chemical Vapor Transport (CVT) method, ensuring high purity, excellent crystallinity, and uniform structural properties.

Sample Size Options:
Crystals larger than 10 mm²
Crystals larger than 25 mm²
Material Properties:
Layered Van der Waals Structure: Enables easy exfoliation into monolayers or few-layer sheets for 2D material studies.
Tunable Bandgap: Direct bandgap (~2.0 eV) in monolayer form and indirect bandgap (~1.4 eV) in bulk, ideal for optoelectronic applications.
High Carrier Mobility: Suitable for field-effect transistors (FETs) and nanoelectronic devices.
Strong Photoluminescence: Monolayer WS₂ exhibits intense photoluminescence, making it ideal for light-emitting applications.
Excellent Catalytic Activity: Effective for hydrogen evolution reactions (HER) due to abundant active edge sites.

Crystal Structure:
Type: Hexagonal (2H phase) layered structure
Features: High crystallinity with uniform, defect-free layers, ideal for thin-film fabrication and nanoscale device applications.

Degree of Exfoliation:
Ease of Use: Easily exfoliated into monolayers or few-layer nanosheets for advanced materials research and device fabrication.

Other Characteristics:
Optical Transparency: High transmittance in the visible range, suitable for transparent electronic devices.
Thermal Stability: Excellent thermal and chemical stability under ambient conditions.
Quantum Confinement Effects: Exhibits unique excitonic effects and strong light-matter interactions in monolayer form.

Applications:
Optoelectronics:
Ideal for photodetectors, light-emitting diodes (LEDs), and solar cells.
Nanoelectronics:
High-performance material for transistors, logic circuits, and flexible electronic devices.
Catalysis:
Excellent electrocatalyst for hydrogen evolution reactions (HER) and energy storage applications.
2D Material Studies:
Perfect for exfoliation into monolayers and integration into van der Waals heterostructures.
Sensors:
High sensitivity for gas detection, chemical sensing, and biosensing applications.

Synthesis Method:
Chemical Vapor Transport (CVT): Ensures high-quality crystals with excellent purity, uniform thickness, and superior structural integrity.