Lattice site location of optical centers in GaN:Eu light emitting diode material grown by organometallic vapor phase epitaxy

K. Lorenz, E. Alves, Iman S. Roqan, K. P. O’Donnell, A. Nishikawa, Y. Fujiwara, M. Boćkowski

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Eu-doped GaN was grown by organometallic vapor phase epitaxy at temperatures from 900 to 1100 °C. Eu incorporation is influenced by temperature with the highest concentration found for growth at 1000 °C. In all samples, Eu is incorporated entirely on substitutional Ga sites with a slight displacement which is highest (∼0.2 Å) in the sample grown at 900 °C and mainly directed along the c-axis. The major optical Eu3+ centers are identical for in situdoped and ion-implanted samples after high temperature and pressure annealing. The dominant Eu3+luminescence lines are attributed to isolated, substitutional Eu.
Original languageEnglish (US)
Pages (from-to)111911
JournalApplied Physics Letters
Issue number11
StatePublished - Sep 16 2010

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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