Boron phosphide
3D model (JSmol)
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  • [B+3].[P-3]
  • B#P
Molar mass 41.7855 g/mol
Appearance maroon powder
Density 2.90 g/cm3
Melting point 1,100 °C (2,010 °F; 1,370 K) (decomposes)
Band gap 2.1 eV (indirect, 300 K)[1]
Thermal conductivity 4.6 W/(cm·K) (300 K)[2]
3.0 (0.63 µm)[1]
Zinc blende
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Boron phosphide (BP) (also referred to as boron monophosphide, to distinguish it from boron subphosphide, B12P2) is a chemical compound of boron and phosphorus. It is a semiconductor.[3]


Crystals of boron phosphide were synthesized by Henri Moissan as early as 1891.[4]


Pure BP is almost transparent, n-type crystals are orange-red whereas p-type ones are dark red.[5]

Chemical properties

BP is not attacked by acids or boiling aqueous alkali water solutions. It is only attacked by molten alkalis.[5]

Physical properties

BP is known to be chemically inert and exhibit very high thermal conductivity.[2] Some properties of BP are listed below:

See also


  1. ^ a b Madelung, O. (2004). Semiconductors: Data Handbook. Birkhäuser. pp. 84–86. ISBN 978-3-540-40488-0.
  2. ^ a b c Kang, J.; Wu, H.; Hu, Y. (2017). "Thermal Properties and Phonon Spectral Characterization of Synthetic Boron Phosphide for High Thermal Conductivity Applications". Nano Letters. 17 (12): 7507–7514. Bibcode:2017NanoL..17.7507K. doi:10.1021/acs.nanolett.7b03437. PMID 29115845.
  3. ^ Popper, P.; Ingles, T. A. (1957). "Boron Phosphide, a III–V Compound of Zinc-Blende Structure". Nature. 179 (4569): 1075. Bibcode:1957Natur.179.1075P. doi:10.1038/1791075a0.
  4. ^ Moissan, H. (1891). "Préparation et Propriétés des Phosphures de Bore". Comptes Rendus. 113: 726–729.
  5. ^ a b Berger, L. I. (1996). Semiconductor Materials. CRC Press. p. 116. ISBN 978-0-8493-8912-2. .

Further reading