Radiation effects in GaN materials and devices

Alexander Y. Polyakov, S. J. Pearton, Patrick Frenzer, Fan Ren, Lu Liu, Ji Hyun Kim

Research output: Contribution to journalArticle

98 Citations (Scopus)

Abstract

This article reviews the effects of radiation damage on GaN materials and devices such as light-emitting diodes and high electron mobility transistors. Protons, electrons and gamma rays typically produce point defects in GaN, in contrast to neutron damage which is dominated by more extended disordered regions. Regardless of the type of radiation, the electrical conductivity of the GaN is reduced through the introduction of trap states with thermal ionization energies deep in the forbidden bandgap. An important practical parameter is the carrier removal rate for each type of radiation since this determines the dose at which device degradation will occur. Many studies have shown that GaN is several orders of magnitude more resistant to radiation damage than GaAs, i.e. it can withstand radiation doses of at least two orders of magnitude higher than those degrading GaAs with a similar doping level. Many issues still have to be addressed. Among them are the strong asymmetry in carrier removal rates in n- and p-type GaN and interaction of radiation defects with Mg acceptors and the poor understanding of interaction of radiation defects in doped nitrides with the dislocations always present. This journal is

Original languageEnglish
Pages (from-to)877-887
Number of pages11
JournalJournal of Materials Chemistry C
Volume1
Issue number5
DOIs
Publication statusPublished - 2013 Feb 7

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Radiation effects
Radiation
Radiation damage
Dosimetry
Defects
Ionization potential
High electron mobility transistors
Point defects
Nitrides
Gamma rays
Light emitting diodes
Protons
Neutrons
Energy gap
Doping (additives)
Degradation
Electrons
gallium arsenide

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

Cite this

Polyakov, A. Y., Pearton, S. J., Frenzer, P., Ren, F., Liu, L., & Kim, J. H. (2013). Radiation effects in GaN materials and devices. Journal of Materials Chemistry C, 1(5), 877-887. https://doi.org/10.1039/c2tc00039c

Radiation effects in GaN materials and devices. / Polyakov, Alexander Y.; Pearton, S. J.; Frenzer, Patrick; Ren, Fan; Liu, Lu; Kim, Ji Hyun.

In: Journal of Materials Chemistry C, Vol. 1, No. 5, 07.02.2013, p. 877-887.

Research output: Contribution to journalArticle

Polyakov, AY, Pearton, SJ, Frenzer, P, Ren, F, Liu, L & Kim, JH 2013, 'Radiation effects in GaN materials and devices', Journal of Materials Chemistry C, vol. 1, no. 5, pp. 877-887. https://doi.org/10.1039/c2tc00039c
Polyakov, Alexander Y. ; Pearton, S. J. ; Frenzer, Patrick ; Ren, Fan ; Liu, Lu ; Kim, Ji Hyun. / Radiation effects in GaN materials and devices. In: Journal of Materials Chemistry C. 2013 ; Vol. 1, No. 5. pp. 877-887.
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