Cadmium Sulfide (CdS) Single Crystal Substrates

Description

Cadmium Sulfide (CdS) single crystal substrates are wide bandgap II-VI semiconductor materials that exhibit excellent optical and electronic properties. CdS substrates are mainly used in optoelectronic devices, laser diodes, photodetectors, photovoltaic cells, and research into heterostructures and thin film epitaxy. With its direct bandgap (~2.42 eV at room temperature), CdS is particularly well-suited for visible light applications and acts as an important template material for the epitaxial growth of various II-VI compounds.

Key Features and Properties:

Wide Direct Bandgap: ~2.42 eV at room temperature, ideal for visible light applications.
High Optical Transparency: Strong transmission from UV to visible spectral range.
Excellent Epitaxial Compatibility: Ideal lattice matching with other II-VI semiconductor materials.
Good Electrical Properties: Suitable for device applications in photodetection and photovoltaic fields.
High Crystallinity: Available with low defect densities and precise orientation control.

Typical Applications:

Substrates for epitaxial growth of ZnCdS, CdTe, and other II-VI semiconductor films
Solar cells and photovoltaic research
Photodetectors and photosensors
Laser diodes
Electro-optical devices
Piezoelectric devices
Research into optoelectronic and photonic materials

Specifications:

Material	Cadmium Sulfide (CdS)
Crystal Structure	Hexagonal (Wurtzite) or Cubic (Zinc Blende)
Chemical Formula	CdS
Lattice Constants	Hex: a = 4.136 Å, c = 6.714 Å; Cubic: a = 5.818 Å
Bandgap Energy	~2.42 eV at 300 K
Transparency Range	0.5 μm – 1.2 μm
Refractive Index	~2.5 at 600 nm
Density	~4.82 g/cm³
Thermal Conductivity	~0.15 W/cm·K
Melting Point	~1750 °C
Typical Wafer Sizes	10 mm, 20 mm, 25.4 mm
Thickness	0.5 mm, 1.0 mm (customizable)
Orientation	(0001), (10-10), (11-20) or (100), (111)
Surface Finish	SSP or DSP
Defect Density	<5×10⁴ cm⁻² (typical)
Surface Roughness (RMS)	<1 nm after polishing (typical)
Growth Method	PVT or Bridgman Method

Material Properties and Crystal Structure:

Chemical Formula: CdS
Crystal Structure: Hexagonal (Wurtzite) or Cubic (Zinc Blende) depending on growth conditions
Growth Method: Physical Vapor Transport (PVT) or Bridgman method
Lattice Constants:
- Hexagonal: a = 4.136 Å, c = 6.714 Å
- Cubic: a = 5.818 Å

Standard Product Sizes and Availability:

Typical wafer diameters: 10 mm, 20 mm, 25.4 mm (1 inch)
Thickness: 0.5 mm, 1.0 mm, or customized
Orientation: (0001), (10-10), (11-20) for hexagonal; (100), (111) for cubic
Surface Finish: Single-side polished (SSP) or double-side polished (DSP)
Custom sizes, thicknesses, and orientations are available upon request

Customization Options:

Custom crystallographic orientations
Special thicknesses and sizes
Surface treatments: chemical mechanical polishing (CMP) for ultra-flatness
Wafer edge rounding or specific edge profiling
Optional AR coatings for UV or visible spectrum

Packaging and Delivery:

Packaged in Class 100 cleanroom environment
Individually vacuum sealed in ESD-safe containers
Protective packaging to prevent mechanical damage

Why Choose Our Cadmium Sulfide (CdS) Single Crystal Substrates?

Strict quality control from crystal growth to final inspection
High-purity materials ensuring excellent optical and electrical performance
Flexible customization to meet your research or production needs
Competitive pricing with fast lead times
Comprehensive technical support from our experienced team

Ordering & Contact Information:

Tinsan Materials offers flexible MOQ (Minimum Order Quantity) and competitive pricing. Our substrates are packaged in Class 100 cleanroom environments and shipped worldwide. For custom orders or technical inquiries, please contact us for a detailed consultation!