WS₂ Crystals

WS₂ Crystals

WS₂ is a layered transition metal dichalcogenide (TMD) with a van der Waals structure and 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, supporting applications in nanoelectronics, optoelectronics, and energy conversion. WS₂ crystals are synthesized using the Chemical Vapor Transport (CVT) method.

Sample Size Options:
Crystals larger than 10 mm²
Crystals larger than 25 mm²

Material Properties:
Layered van der Waals Structure: Permits exfoliation into monolayers or few-layer sheets for 2D material studies.
Variable Bandgap: Direct bandgap (~2.0 eV) in monolayer form and indirect bandgap (~1.4 eV) in bulk, applicable for optoelectronic applications.
Carrier Mobility: Applicable to field-effect transistors (FETs) and nanoelectronic devices.
Photoluminescence: Monolayer WS₂ exhibits intense photoluminescence, supporting light-emitting applications.
Catalytic Activity: Used in hydrogen evolution reactions (HER) involving active edge sites.

Crystal Structure:
Type: Hexagonal (2H phase) layered structure
Features: Layers applicable for thin-film fabrication and nanoscale device applications.

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

Other Characteristics:
Optical Transparency: Transmittance in the visible range, applicable to transparent electronic devices.
Thermal behavior: Thermal and chemical behavior under ambient conditions.
Quantum Confinement Effects: Exhibits excitonic effects and light-matter interactions in monolayer form.

Applications:
Optoelectronics:
Applicable for photodetectors, light-emitting diodes (LEDs), and solar cells. Nanoelectronics:
Used for transistors, logic circuits, and flexible electronic devices. Catalysis:
Electrocatalyst for hydrogen evolution reactions (HER) and energy storage applications.
2D Material Studies:
Applicable for exfoliation into monolayers and assembly into van der Waals heterostructures. Sensors:
Used for gas detection, chemical sensing, and biosensing applications. Synthesis Method:
Chemical Vapor Transport (CVT).