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Codoping of magnesium with oxygen in gallium nitride nanowires

  • zhiguo), zg wang (wang
  • jingbo), (li
  • fei), f gao (gao
  • william j.), wj weber (weber
Publication Date
Jan 01, 2010
Knowledge Repository of SEMI,CAS
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Codoping of p-type GaN nanowires with Mg and oxygen was investigated using first-principles calculations. The Mg becomes a deep acceptor in GaN nanowires with high ionization energy due to the quantum confinement. The ionization energy of Mg doped GaN nanowires containing passivated Mg-O complex decreases with increasing the diameter, and reduces to 300 meV as the diameter of the GaN nanowire is larger than 2.01 nm, which indicates that Mg-O codoping is suitable for achieving p-type GaN nanowires with larger diameters. The codoping method to reduce the ionization energy can be effectively used in other semiconductor nanostructures. (C) 2010 American Institute of Physics.

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