Cadmium Telluride

Title: Cadmium Telluride
CAS Registry Number: 1306-25-8
Molecular Formula: CdTe
Molecular Weight: 240.01
Percent Composition: Cd 46.84%, Te 53.16%
Literature References: Prepd by fusion of the elements or by the action of H2Te on CdCl2 solns: Dennis, Anderson, J. Am. Chem. Soc. 36, 887 (1914); Kroger, de Nobel, J. Electron. 1, 190 (1955); Kretschmar, Schilberg, J. Appl. Phys. 28, 865 (1957); from aluminum telluride and a cadmium salt: Nitsche, US 2767049 (1956 to du Pont). Prepn of high purity CdTe: Taylor, Conn, US 3540859 (1970 to Merck & Co.); prepn of single crystals: Kyle, US 3519399 (1970 to Hughes Aircraft).
Properties: Brownish-black, cubic crystals by sublimation in hydrogen. d415 6.2. mp 1041°. Oxidizes upon prolonged exposure to moist air. Practically insol in water and acids, except nitric, in which it is sol with decompn.
Melting point: mp 1041°
Density: d415 6.2
Use: In semiconductor research, in phosphors.
Cadmium Tungstate(VI) Cadusafos Cafaminol Cafestol Caffeic Acid

Cadmium telluride
Cadmium telluride
Identifiers
CAS number 1306-25-8 YesY
PubChem 91501
ChemSpider 82622 YesY
RTECS number EV3330000
Jmol-3D images Image 1
Properties
Molecular formula CdTe
Molar mass 240.01 g mol−1
Density 5.85 g·cm−3[1]
Melting point 1041 °C [2]
Boiling point 1050 °C
Solubility in water insoluble
Solubility in other solvents insoluble
Band gap 1.44 eV (@300 K, direct)
Refractive index (nD) 2.67 (@10 µm)
Structure
Crystal structure zincblende (cubic) (space group F43m
Hazards
EU Index 048-001-00-5
EU classification Harmful (Xn)
Dangerous for the environment (N)
R-phrases R20/21/22, R50/53
S-phrases (S2), S60, S61
Related compounds
Other anions Cadmium oxide
Cadmium sulfide
Cadmium selenide
Other cations Zinc telluride
Mercury telluride
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Cadmium telluride (CdTe) is a stable crystalline compound formed from cadmium and tellurium. It is used as an infrared optical window and a solar cell material. It is usually sandwiched with cadmium sulfide to form a p-n junction photovoltaic solar cell. Typically, CdTe photovoltaic cells use a n-i-p structure.