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Transition Metal Luminescence in AlN Crystals

Published online by Cambridge University Press:  21 February 2011

K. Pressel
Affiliation:
Institut für Halbleiterphysik, P.O.Box 409, 15204 Frankfurt (Oder), Germany
R. Heitz
Affiliation:
Institut für Festkörperphysik, TU-Berlin, 10623 Berlin, Germany
S. Nilsson
Affiliation:
Institut für Halbleiterphysik, P.O.Box 409, 15204 Frankfurt (Oder), Germany
P. Thurian
Affiliation:
Institut für Festkörperphysik, TU-Berlin, 10623 Berlin, Germany
A. Hoffmann
Affiliation:
Institut für Festkörperphysik, TU-Berlin, 10623 Berlin, Germany
B.K. Meyer
Affiliation:
Physik-Department E16, TU-München, 85748 Garching, Germany
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Abstract

We study deep defects in AIN crystals in the near infrared by photoluminescence and compare the observed emissions with those in GaN. By below bandgap excitation with an Ar ion laser three no-phonon lines at 1.043 eV, 0.943 eV, and 0.797 eV were detected, which are caused by different residual transition metal contaminants. The weak emission at 1.043 eV and the intensive emission at 0.797 eV show A1N related phonon sidebands, whereas the emission at 0.943 eV has practically no phonon sideband. No hot lines could be detected for the emissions at 0.943 and 0.797 eV in temperature dependent measurements. We discuss possible identifications of the luminescence centers and the similarity between GaN and AIN in view of transition metals.

Type
Research Article
Copyright
Copyright © Materials Research Society 1996

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References

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