Defects in electron and neutron irradiated n-GaN: Disordered regions versus point defects

Alexander Y. Polyakov; Nikolai B. Smirnov; Anatoliy V. Govorkov; Alexander V. Markov; Cheul Ro Lee; In Hwan Lee; Nikolai G. Kolin; Denis I. Merkurisov; Vladimir M. Boiko; James S. Wright; Stephen J. Pearton

doi:10.1557/proc-0955-i07-46

Defects in electron and neutron irradiated n-GaN: Disordered regions versus point defects

Alexander Y. Polyakov, Nikolai B. Smirnov, Anatoliy V. Govorkov, Alexander V. Markov, Cheul Ro Lee, In Hwan Lee, Nikolai G. Kolin, Denis I. Merkurisov, Vladimir M. Boiko, James S. Wright, Stephen J. Pearton

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Citations (Scopus)

Abstract

Effects of 10 MeV electron and fast reactor neutron irradiations on carrier removal rate and deep traps spectra were compared for undoped n-GaN samples. It is shown that for electron irradiation the carrier removal rate is well accounted for by the difference in introduction rates of nitrogen-vacancy- related donors with activation energy 0.2 eV and of nitrogen-interstitial- related acceptors at E_c-1.2 eV. In the case of neutron irradiation the introduction rate of all deep traps was much lower than the carrier removal rate indicating that the main contribution to electron removal was due to disordered regions. These regions give rise to a marked persistent photocapacitance signal and a hole-trap-like feature in deep traps spectra. The Fermi level position in the core of disordered regions is located near E _c-(0.85-1) eV.

Original language	English
Title of host publication	Advances in III-V Nitride Semiconductor Materials and Devices
Publisher	Materials Research Society
Pages	245-247
Number of pages	3
ISBN (Print)	9781604234114
DOIs	https://doi.org/10.1557/proc-0955-i07-46
Publication status	Published - 2006
Externally published	Yes
Event	2006 MRS Fall Meeting - Boston, MA, United States Duration: 2006 Nov 27 → 2006 Dec 1

Publication series

Name	Materials Research Society Symposium Proceedings
Volume	955
ISSN (Print)	0272-9172

Other

Other	2006 MRS Fall Meeting
Country/Territory	United States
City	Boston, MA
Period	06/11/27 → 06/12/1

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1557/proc-0955-i07-46

Cite this

Polyakov, A. Y., Smirnov, N. B., Govorkov, A. V., Markov, A. V., Lee, C. R., Lee, I. H., Kolin, N. G., Merkurisov, D. I., Boiko, V. M., Wright, J. S., & Pearton, S. J. (2006). Defects in electron and neutron irradiated n-GaN: Disordered regions versus point defects. In Advances in III-V Nitride Semiconductor Materials and Devices (pp. 245-247). (Materials Research Society Symposium Proceedings; Vol. 955). Materials Research Society. https://doi.org/10.1557/proc-0955-i07-46

Defects in electron and neutron irradiated n-GaN: Disordered regions versus point defects. / Polyakov, Alexander Y.; Smirnov, Nikolai B.; Govorkov, Anatoliy V. et al.
Advances in III-V Nitride Semiconductor Materials and Devices. Materials Research Society, 2006. p. 245-247 (Materials Research Society Symposium Proceedings; Vol. 955).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Polyakov, AY, Smirnov, NB, Govorkov, AV, Markov, AV, Lee, CR, Lee, IH, Kolin, NG, Merkurisov, DI, Boiko, VM, Wright, JS & Pearton, SJ 2006, Defects in electron and neutron irradiated n-GaN: Disordered regions versus point defects. in Advances in III-V Nitride Semiconductor Materials and Devices. Materials Research Society Symposium Proceedings, vol. 955, Materials Research Society, pp. 245-247, 2006 MRS Fall Meeting, Boston, MA, United States, 06/11/27. https://doi.org/10.1557/proc-0955-i07-46

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abstract = "Effects of 10 MeV electron and fast reactor neutron irradiations on carrier removal rate and deep traps spectra were compared for undoped n-GaN samples. It is shown that for electron irradiation the carrier removal rate is well accounted for by the difference in introduction rates of nitrogen-vacancy- related donors with activation energy 0.2 eV and of nitrogen-interstitial- related acceptors at Ec-1.2 eV. In the case of neutron irradiation the introduction rate of all deep traps was much lower than the carrier removal rate indicating that the main contribution to electron removal was due to disordered regions. These regions give rise to a marked persistent photocapacitance signal and a hole-trap-like feature in deep traps spectra. The Fermi level position in the core of disordered regions is located near E c-(0.85-1) eV.",

author = "Polyakov, {Alexander Y.} and Smirnov, {Nikolai B.} and Govorkov, {Anatoliy V.} and Markov, {Alexander V.} and Lee, {Cheul Ro} and Lee, {In Hwan} and Kolin, {Nikolai G.} and Merkurisov, {Denis I.} and Boiko, {Vladimir M.} and Wright, {James S.} and Pearton, {Stephen J.}",

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doi = "10.1557/proc-0955-i07-46",

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AU - Polyakov, Alexander Y.

AU - Smirnov, Nikolai B.

AU - Govorkov, Anatoliy V.

AU - Markov, Alexander V.

AU - Lee, Cheul Ro

AU - Lee, In Hwan

AU - Kolin, Nikolai G.

AU - Merkurisov, Denis I.

AU - Boiko, Vladimir M.

AU - Wright, James S.

AU - Pearton, Stephen J.

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N2 - Effects of 10 MeV electron and fast reactor neutron irradiations on carrier removal rate and deep traps spectra were compared for undoped n-GaN samples. It is shown that for electron irradiation the carrier removal rate is well accounted for by the difference in introduction rates of nitrogen-vacancy- related donors with activation energy 0.2 eV and of nitrogen-interstitial- related acceptors at Ec-1.2 eV. In the case of neutron irradiation the introduction rate of all deep traps was much lower than the carrier removal rate indicating that the main contribution to electron removal was due to disordered regions. These regions give rise to a marked persistent photocapacitance signal and a hole-trap-like feature in deep traps spectra. The Fermi level position in the core of disordered regions is located near E c-(0.85-1) eV.

AB - Effects of 10 MeV electron and fast reactor neutron irradiations on carrier removal rate and deep traps spectra were compared for undoped n-GaN samples. It is shown that for electron irradiation the carrier removal rate is well accounted for by the difference in introduction rates of nitrogen-vacancy- related donors with activation energy 0.2 eV and of nitrogen-interstitial- related acceptors at Ec-1.2 eV. In the case of neutron irradiation the introduction rate of all deep traps was much lower than the carrier removal rate indicating that the main contribution to electron removal was due to disordered regions. These regions give rise to a marked persistent photocapacitance signal and a hole-trap-like feature in deep traps spectra. The Fermi level position in the core of disordered regions is located near E c-(0.85-1) eV.

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ER -

Defects in electron and neutron irradiated n-GaN: Disordered regions versus point defects

Abstract

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