Cadmium Sulfide (CdS) for Research & Development
Cadmium Sulfide (Cds) Substrate Dimensions in Stock
The following specs are available for immediate delivery.
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 CdS (0001) 10mm x 10mm x 0.5 mm, SSP R:10^3-10^5 ohm.cm |
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CdS (0001), 10mm x 10mm x 1.0mm <1 ohm-cm DSP (60/40) |
CdS (0001) N type 10mm x 10mm x 1.0mm >1E6 ohm-cm DSP |
 CdS (0001) N type 25.4 mm x 1.0 mm >1E6ohm-cm DSP (60/40) |
CdS (0001) N type, 38.1mm x 1.0mm R>10^6 ohm-cm DSP (60/40) |
CdS (0001) N type 38.1mm x 1.0mm <1 ohm-cm DSP (60/40) |
Get Your CdS Quote FAST!
What is The Electron Density of Cadmium Sulfide (CdS) Wafer
A researcher recently requested the following CdS Wafer spec.
I want buy CdS (0001), 10x10x1.0 mm, resistivities: <1 ohm-cm, DSP (60/40) CdS (0001), N type, 10x10x1.0 mm, Resistivity: >1E6 ohm-cm, DSP could you tell me ,what is it means DSP(60/40) and provide the doping material, the doping density?
UniversityWafer, Inc. Quoted:
We can supply the following:
Material: CdS - High resistivity >1E6 ohm-cm
Size : 10 x 10 x 1 mm
Surface: two sides polished 60/40 (Scr/Dig)
Surface roughness : <= 10 A
Orientation : <0001>+/-0.5 degree
Material: CdS - Low resistivity <1 ohm-cm
Size : 10 x 10 x 1 mm
Surface : two sides polished 60/40 (Scr/Dig)
Surface roughness : <= 10 A
Orientation : <0001>+/-0.5 degree
Research replies:
Can you provide the electron density of CdS wafer , the name of the doped material and the concentration of doping?Answer
High-resistivity CdS is undoped. It has high (over 10^10 Ohm*cm) specific resistivity, hence the exact measurement of electron density is difficult. It was estimated as (approximately) 10^16 cm^-3.Low-resistivity CdS is nominally undoped. The cause of low resistivity is a deviation of stoichiometry towards an excess of Cd. The electron density is about 1*10^17 - 2*10^17 cm^-3.
What is Cadmium Sulfide (CdS)?
Cadmium sulfide is a yellow-coloured element used in electronics. The material is a semiconductor, meaning that it has the ability to transfer electricity. As a semiconductor, cadmium sulfide is a bandgap material, meaning that electrons are distributed in bands of energy, which must be crossed in order to pass through a material. This is what gives the compound its yellow colour.
Greenockite
Greenockite is a rare form of cadmium sulfide. It is a sulfur and cadmium compound, and it forms hexagonal and cubic crystals. Its physical properties are similar to those of sphalerite.
Greenockite was once used as a yellow pigment, before cadmium was discovered to be toxic. Today, extracted cadmium is used in a variety of industrial applications, including nickel-cadmium rechargeable batteries and high-temp alloys. It is also used in the control rods of some nuclear reactors.
Cadmium sulfide is a yellowish solid, and it is soluble in acid. It is easily isolated and is used in a wide range of products. It is also an important component in some types of solar cells. While the compound is highly reactive, it is flammable and toxic.
Chemical compound
Cadmium sulfide is a chemical compound with many uses. It is often used in paint and in batteries. Its bright yellow color is a popular pigment for many artworks. It also has many uses in the manufacturing of batteries. The chemical compound is available in various concentrations. When you are buying cadmium sulfide, you should ensure that you are getting it packaged safely. You should also check the safety data sheet for more information on the chemical's use.
Cadmium sulfide is a yellowish metal that can be used to produce a wide range of different colours. Several artists have incorporated it into their painting palettes since it was discovered in the late 1800s. Impressionist artists, particularly Vincent van Gogh, used it in experimenting with new paint colours. Other artists who used it included Monet and Matisse.
Common impurity in zinc ores
Cadmium is a rare element and occurs only in trace amounts in zinc ores. It has been linked with the development of cancer. Despite this, cadmium is used in many products, including batteries and paint. While it is rare, cadmium is often used in industrial processes. When zinc ores are mined, the primary zinc impurity is zinc oxide, which contains 0.1 to 0.3 percent of cadmium. The ore is then processed by electrolysis in sulfuric acid, where the cadmium sulfate precipitates.
The geology of zinc deposits is highly complex. Water-saturated ores containing zinc can contain sulfides of lead and cadmium. These minerals are present in trace amounts in zinc ores, which is why beneficiation is essential to obtain a suitable concentrate for processing. Flotation separation is a process that separates the sulfide mineral from its impure constituents (the gangue). During this process, the zinc-containing mineral must be crushed to less than 1.9 centimetres in size. The flotation process requires the use of flotation cells, chemical reagents that suspend air bubbles in the solution, and beaters that stir the slurry.
Hazardous air pollutant
Cadmium sulfide is a metal found in the earth's crust and can cause severe health problems if inhaled. It is classified as a hazardous air pollutant and is subject to reporting requirements under the SARA Title III and 40 CFR Part 373. However, it is not listed as a Class 1 Ozone depletor or as a priority pollutant under the CWA or the Clean Water Act.
Cadmium is a male reproductive and developmental toxicant. The California Air Pollution Control Officers Association has established a reference exposure level (REL) for cadmium. This level is based on toxicological endpoints relating to the kidney and respiratory system. However, the U.S. EPA has not yet established a Reference Concentration or Reference Dose for cadmium in the air. However, the EPA has determined that Cadmium Sulfide is present in drinking water and food for people exposed to it.
Use as pigment
Cadmium sulfide is a chemical compound that occurs naturally in the minerals greenockite and hawleyite. It is a toxic substance that is dangerous if inhaled or ingested. It is soluble in concentrated mineral acids, and its evolution produces H2S. This compound has extremely high refractive index, which makes it suitable for use as a pigment.
The process for producing this pigment includes end-treating a slurry of cadmium sulfide. The resulting pigment is superior to those produced using other methods.