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Your current location :Home > Cadmium selenide - CdSe

Cadmium Selenide (CdSe)

CdSe granule, cadmium selenideCadmium selenide (CdSe) is a solid, Greenish-brown or dark red solid powder, binary compound of cadmium and selenium. Cadmium selenide in its wurtzite (hexagonal) crystal structure is an important II-VI semiconductor. Common names for this compound are cadmium (II) selenide, cadmium selenide, and cadmoselite. Cadmium is a toxic heavy metal and appropriate precautions should be taken when handling it and its compounds. Selenides are toxic in large amounts. It can be used as powder, crystal chunks, single- and polycrystals, optic elements and other details manufactured from the crystals. Cadmium selenide is a semiconducting material, but has yet to find many applications in manufacturing. This material is transparent to infra-red (IR) light, and has seen limited use in windows for instruments utilizing IR light. Much current research on cadmium selenide has focused on nanoparticles. Researchers are concentrating on developing controlled syntheses of CdSe nanoparticles. In addition to synthesis, scientists are working to understand the properties of cadmium selenide, as well as apply these materials in useful ways. (BR)As a semiconductor CdSe has a band gap of 1.74 eV at 300 K. It is an n-type semiconductor, which is difficult to dope p-type, however p-type doping has been achieved using nitrogen. CdSe is also being developed for use in opto-electronic devices, laser diodes, nanosensing, and biomedical imaging. They are also used being tested for use in high-efficiency solar cells.
Most of the usefulness of CdSe stems from nanoparticles. Nanoparticles are just what the name implies, particles of CdSe that are 1–100 nm (1 nm = 10?9 m) in size. CdSe particles of this size exhibit a property known as quantum confinement. Quantum confinement results when the electrons in a material are confined to a very small volume. Quantum confinement is size dependent, meaning the properties of CdSe nanoparticles are tunable based on their size.
Since CdSe nanoparticles have a size dependent fluorescence spectrum, they are finding applications in optical devices such as laser diodes. Using these particles, engineers are able to manufacture laser diodes that cover a large part of the electromagnetic spectrum.
Along similar lines, doctors are developing these materials for use in biomedical imaging applications. Human tissue is permeable to far infra-red light. By injecting appropriately prepared CdSe nanoparticles into injured tissue, it may be possible to image the tissue in those injured areas.
Basic Information
  • Color: Black
  • Odor: Odorless
  • Melting point/Melting range:1240 °C
  • Boiling point/Boiling range:Not determined
  • Sublimation temperature / start:approx. 1150 °C
  • Flash point:Not applicable
  • Ignition temperature:Not applicable
  • Decomposition temperature: Not determined
  • Danger of explosion: Product does not present an explosion hazard.
  • Explosion limits: Not applicable
  • Vapor pressure: negligible (at 20 °C)
  • Density:5.816 g/cm3 (crystal at 20 °C)
  • Solubility in / Miscibility with Water: Insoluble
  • CAS NUMBER: [1306-24-7]

Cadmium Selenium Sputtering Target (CdSe target)
Purity--99.999% Density---5.81 g/cm3
Size --- Discs: Dia(≤360mm),Thickness(≥0.5mm)
              Rectangle: Length(≤250mm),Width(≤250mm),Thickness(≥1mm)
              Rods: Dia(≤250mm),Length(≤250mm)
              Pellets: Dia(≤250mm),Thickness(≥1mm)
Application --- IR optics, polarizers, beamsplitters, l/4 and l/2 waveplates; substrates; sources for vacuum deposition.

Cadmium Selenium Granule (CdSe granule, evaporation material)

Color---Yellow Purity--- 99.999%

Shape--- Granule

Application---IR optics, polarizers, beamsplitters, l/4 and l/2 waveplates; substrates; sources for vacuum deposition

Cadmium Selenium (CdSe) Powders

Color---Yellow Powders Purity--- 99.999%

Shape--- Powder

Application---IR optics, polarizers, beamsplitters, l/4 and l/2 waveplates; substrates; sources for vacuum deposition, optoelectronics, luminescent materials, lasing materials and biomedical imaging. It is perhaps best known as the basis for quantum dots that have applications in biomedical imaging.

As one of coating material of solar cell, other coating material of solar cell show as below:
Amorphous-Si (a-Si) & Multi-junction
Cadmium Telluride (CdTe)
Copper Indium Gallium DiSelenide (CIGS)
TCO - Cd2SnO4, SnO2/Sb2O3, ZnO/Al2O3, ZnO/Al, ZnO/Ga2O3, Zn/MgO
CdTe - CdTe, CdS, Cd2SnO4, Zn2SnO4
Contact Materials - Ag, Ag alloys, Al, Ni/V, Ni, Ti, Cu

 

 

 

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