Boron phosphide explained
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.[1]
History
Crystals of boron phosphide were synthesized by Henri Moissan as early as 1891.[2]
Appearance
Pure BP is almost transparent, n-type crystals are orange-red whereas p-type ones are dark red.[3]
Chemical properties
BP is not attacked by acids or boiling aqueous alkali water solutions. It is only attacked by molten alkalis.[3]
Physical properties
BP is known to be chemically inert and exhibit very high thermal conductivity.[4] Some properties of BP are listed below:
- lattice constant 0.45383 nm
- coefficient of thermal expansion 3.65 /°C (400 K)
- heat capacity CP ~ 0.8 J/(g·K) (300 K)
- Debye temperature = 985 K
- Bulk modulus 152 GPa
- relatively high microhardness of 32 GPa (100 g load).
- electron and hole mobilities of a few hundred cm2/(V·s) (up to 500 for holes at 300 K)
- high thermal conductivity of ~ 460 W/(m·K) at room temperature[4]
See also
Further reading
- Book: Boron Chemistry at the Millennium . King, R. B. . Elsevier Science & Technology . 1999 . 0-444-72006-5 .
- patent . P-N Junction Type Boron Phosphide-Based Semiconductor Light-Emitting Device and Production Method thereof . US . 6831304 . 2004-12-14 . Showa Denko . Takashi, U. .
- Semiconducting Properties of Cubic Boron Phosphide . Stone, B. . Hill, D. . Physical Review Letters . 1960 . 4 . 6 . 282–284 . 10.1103/PhysRevLett.4.282 . 1960PhRvL...4..282S .
Notes and References
- Popper, P. . Ingles, T. A. . Boron Phosphide, a III–V Compound of Zinc-Blende Structure . Nature . 1957 . 179 . 4569 . 1075 . 10.1038/1791075a0 . 1957Natur.179.1075P . free .
- Moissan, H. . Préparation et Propriétés des Phosphures de Bore . Comptes Rendus . 113 . 1891 . 726–729 .
- Book: Berger, L. I. . Semiconductor Materials . CRC Press . 1996 . 978-0-8493-8912-2 . registration . . . 116 .
- Kang, J. . Wu, H. . Hu, Y.. Thermal Properties and Phonon Spectral Characterization of Synthetic Boron Phosphide for High Thermal Conductivity Applications . Nano Letters. 2017 . 17 . 12 . 7507–7514 . 10.1021/acs.nanolett.7b03437 . 29115845 . 2017NanoL..17.7507K .
