Aluminium Phosphide (AlP) Semiconductors

Topics Covered

Chemical Properties
Electrical Properties
Thermal and Mechanical Properties
Safety Information


Aluminium phosphide is an inorganic compound used as a fumigant and wide band gap semiconductor. It is a colorless solid generally sold as a grey-green- yellow powder due to the presence of impurities generated from oxidation and hydrolysis.


Aluminium phosphide finds applications in the following:

  • Semiconductor applications
  • Pesticide.

Chemical Properties

The chemical properties of aluminium phosphide are provided in the table below:

Chemical Properties
Chemical Formula AlP
Molecular Weight 57.95
CAS No. 20859-73-8
Group Aluminium – 13
Phosphorus - 15
Crystal Structure Cubic
Lattice Constant 5.451 Å

Electrical Properties

The electrical properties of aluminium phosphide are provided in the table below:

Electrical Properties
Dielectric Constant 9.8
Band Gap 2.45 eV
Electron Mobility 80 cm2/Vs

Thermal and Mechanical Properties

The thermal and mechanical properties of aluminium phosphide are provided in the tables below:

Thermal Properties
Thermal Conductivity 92 W/mK
Debye Temperature 315°C
Mechanical Properties
Density 2.42 g/cm3
Melting Point 1827°C
Mohs Hardness 5.5

Safety Information

Safety Information
GHS Hazard Statements H315 - Causes skin irritation
H320 - Causes eye irritation
H331- Toxic if inhaled
Safety Precautions P233 - Keep container tightly closed
P260 - Do not breathe dust/fume/gas/mist/vapors/spray
P281- Use personal protective equipment as required
P309+311 - If exposed or you feel unwell: Call a poison center or doctor/physician.



Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    ESPI Metals. (2013, August 20). Aluminium Phosphide (AlP) Semiconductors. AZoM. Retrieved on October 23, 2020 from

  • MLA

    ESPI Metals. "Aluminium Phosphide (AlP) Semiconductors". AZoM. 23 October 2020. <>.

  • Chicago

    ESPI Metals. "Aluminium Phosphide (AlP) Semiconductors". AZoM. (accessed October 23, 2020).

  • Harvard

    ESPI Metals. 2013. Aluminium Phosphide (AlP) Semiconductors. AZoM, viewed 23 October 2020,

Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback