Cadmium Sulfide (CdS) Powder / CdS Powder (Super Grade, 3 µm, 99.99%)

Description

Cadmium Sulfide (CdS) Powder / CdS Powder (Super Grade, 3 µm, 99.99%)

Cadmium Sulfide (CdS) Powder is a high-purity semiconductor material with super grade quality (99.99%) and a fine particle size of 3 µm. Appearing as a yellow–orange powder, CdS crystallizes in both hexagonal (wurtzite) and cubic (zinc blende) structures. It is a direct band gap semiconductor with a band gap ranging from 2.42–2.57 eV, making it ideal for optoelectronic and photovoltaic applications.

CdS occurs naturally as the rare minerals greenockite and hawleyite, but commercial CdS powders are highly purified for electronic and industrial use. Its excellent optical absorption, stability, and ability to form thin films make it one of the most widely used II–VI compound semiconductors.

Technical Properties

• Purity: 99.99% (Super Grade, metal basis)

• Average Particle Size (APS): 3 µm

• Appearance: Yellow–orange powder

• Density: 4.826 g/cm³

• Melting Point: 1,750 °C (at 10 MPa)

• Boiling Point: 980 °C

• Crystal Structures: Hexagonal (Wurtzite) / Cubic (Zinc blende)

• Solubility: Insoluble in water; soluble in acids; slightly soluble in ammonium hydroxide

Certificate of Analysis (ppm, max):

• Fe: <500

• Si: <100

• K: <100

• Na: <100

• Ca: <100

Key Features

• High purity (99.99%) for advanced optical and electronic applications

• Stable semiconductor with direct band gap suitable for visible light applications

• Excellent optical absorption and photoconductivity

• Dual crystal structures allow flexibility in thin-film processing

• Consistent super grade quality with controlled impurity levels

Applications

Optoelectronics & Photonics

• Used in photoresistors (LDRs), photodiodes, and thin-film solar cells

• Key material for phosphors, LEDs, and semiconductor lasers

Pigments & Industrial Use

• Cadmium yellow pigment in specialty paints and ceramics (controlled environments)

• Applied in chemical industry as a stable yellow–orange colorant

Semiconductor Devices

• Thin-film coatings for optical detectors and sensors

• Infrared optical devices and filters

Research & Development

• Studied for quantum dot synthesis (CdS QDs) for biomedical imaging, sensors, and advanced photonics

• Applied in nanocomposites for enhanced photocatalytic and electronic properties