Indium arsenide

Indium arsenide, InAs, or indium monoarsenide, is a semiconductor composed of indium and arsenic. It has the appearance of grey cubic crystals with a melting point of 942 °C.[3]

Indium arsenide[1]
Names
IUPAC name
Indium(III) arsenide
Other names
Indium monoarsenide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.013.742
UNII
Properties
InAs
Molar mass 189.740 g/mol
Density 5.67 g/cm3
Melting point 942 °C (1,728 °F; 1,215 K)
Band gap 0.354 eV (300 K)
Electron mobility 40000 cm2/(V*s)
Thermal conductivity 0.27 W/(cm*K) (300 K)
3.51
Structure
Zinc Blende
a = 6.0583 Å
Thermochemistry
47.8 J·mol−1·K−1
75.7 J·mol−1·K−1
Std enthalpy of
formation (ΔfH⦵298)
 -58.6 kJ·mol−1
Hazards
Safety data sheet External SDS
GHS pictograms [2]
GHS Signal word Danger[2]
GHS hazard statements
 H301, H331[2]
P261, P301+310, P304+340, P311, P405, P501[2]
NFPA 704 (fire diamond)
Flammability code 0: Will not burn. E.g. waterHealth code 4: Very short exposure could cause death or major residual injury. E.g. VX gasReactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
0
4
0
Related compounds
Other anions
 Indium nitride
Indium phosphide
Indium antimonide
Other cations
 Gallium arsenide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is YN ?)
Infobox references

Indium arsenide is used for construction of infrared detectors, for the wavelength range of 1–3.8 µm. The detectors are usually photovoltaic photodiodes. Cryogenically cooled detectors have lower noise, but InAs detectors can be used in higher-power applications at room temperature as well. Indium arsenide is also used for making of diode lasers.

Indium arsenide is similar to gallium arsenide and is a direct bandgap material.

Indium arsenide is sometimes used together with indium phosphide. Alloyed with gallium arsenide it forms indium gallium arsenide - a material with band gap dependent on In/Ga ratio, a method principally similar to alloying indium nitride with gallium nitride to yield indium gallium nitride.

InAs is well known for its high electron mobility and narrow energy bandgap. It is widely used as terahertz radiation source as it is a strong photo-Dember emitter.

Quantum dots can be formed in a monolayer of indium arsenide on indium phosphide or gallium arsenide. The mismatches of lattice constants of the materials create tensions in the surface layer, which in turn leads to formation of the quantum dots.[4] Quantum dots can also be formed in indium gallium arsenide, as indium arsenide dots sitting in the gallium arsenide matrix.

References
  1. Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, FL: CRC Press, pp. 4–61, ISBN 0-8493-0594-2
  2. "Indium Arsenide". American Elements. Retrieved October 12, 2018.
  3. "Thermal properties of Indium Arsenide (InAs)". Retrieved 2011-11-22.
  4. "oe magazine - eye on technology". Archived from the original on 2006-10-18. Retrieved 2011-11-22.
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