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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Ali, M. A. |
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Azevedo, Nuno Monteiro |
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Juday, R.
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article
Hydrogen-related, deeply bound excitons in Mg-doped GaN films
Abstract
<jats:p>Luminescence in the near band-edge spectral region of Mg-doped GaN films grown by metalorganic chemical vapor deposition has been studied at liquid-helium temperatures. Radiative transitions at 3.37 and 3.416 eV were observed to evolve in cathodoluminescence spectra during electron-beam irradiation at 5 kV. The intensity of the 3.37 eV peak correlates monotonically with the resistivity of the films. By annealing the films in N2 and N2/H2 atmospheres, the 3.37 and 3.416 eV transitions are shown to be related to hydrogen.</jats:p>