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Photoluminescence of Fe-Complexes in GaN

Published online by Cambridge University Press:  10 February 2011

P. Thurian ,
A. Hoffmann ,
L. Eckey ,
P. Maxim ,
R. Heitz ,
I. Broser ,
K. Pressel ,
B-K. Meyer ,
J. Schneider  and
J. Baur
...Show all authors
P. Thurian
Affiliation:
TU-Berlin, Institut für Festkörperphysik, ardenbergstr. 36, 10623 Berlin, Germany
A. Hoffmann
Affiliation:
TU-Berlin, Institut für Festkörperphysik, ardenbergstr. 36, 10623 Berlin, Germany
L. Eckey
Affiliation:
TU-Berlin, Institut für Festkörperphysik, ardenbergstr. 36, 10623 Berlin, Germany
P. Maxim
Affiliation:
TU-Berlin, Institut für Festkörperphysik, ardenbergstr. 36, 10623 Berlin, Germany
R. Heitz
Affiliation:
TU-Berlin, Institut für Festkörperphysik, ardenbergstr. 36, 10623 Berlin, Germany
I. Broser
Affiliation:
TU-Berlin, Institut für Festkörperphysik, ardenbergstr. 36, 10623 Berlin, Germany
K. Pressel
Affiliation:
Institut für Halbleiterphysik, P. 0. Box 409, 15204 Frankfurt (Oder), Germany
B-K. Meyer
Affiliation:
Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 16, D-35392 Giessen Germany
J. Schneider
Affiliation:
Fraunhofer-Institut, Tullastr. 72, D-79108 Freiburg, Germany
J. Baur
Affiliation:
Fraunhofer-Institut, Tullastr. 72, D-79108 Freiburg, Germany
M. Kunzer
Affiliation:
Fraunhofer-Institut, Tullastr. 72, D-79108 Freiburg, Germany
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Abstract

We report a photoluminescence (PL) and photoluminescence excitation (PLE) investigation of the deep iron acceptor in hexagonal GaN. Codoped samples give rise to a new zero-phonon line (ZPL) at 1.268 eV. The spectral shape of its phonon side band is very similar to that of the Fe3+ -spectrum. A lifetime of 2.6 ms was measured for this ZPL which indicates a spinforbidden transition. In contrast to isolated Fe3+, no Zeeman-splitting is observed. PLE spectra of the Fe3+ (4T1-6A1) zero-phonon line at 1.299 eV in semi-insulating GaN samples reveal intracenter excitation processes via excited states of the Fe3+ center. Three excited Fe3+ crystal field states at 1.299 eV (4T1), 2.01 eV (4T2), and 2.731 eV (4E) above the 6A1, ground state were identified. PLE spectroscopy for the 1.268 eV zero-phonon line reveals resonances at 2.3 eV and 2.65 eV. The 1.268 eV ZPL is tentatively attributed to a Fe-complex with a nearby donor.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 449: Symposium N – III-V Nitrides , 1996 , 707
Copyright
Copyright © Materials Research Society 1997

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References

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