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Near-band-edge slow luminescence in nominally undoped bulk ZnO
2005
Journal of Applied Physics
We report the observation of slow emission bands overlapped with the near-band-edge steady-state luminescence of nominally undoped ZnO crystals. At low temperatures the time-resolved spectra are dominated by the emission of several high-energy bound exciton lines and the two-electron satellite spectral region. Furthermore, two donor-acceptor pair transitions at 3.22 and 3.238 eV are clearly identified in temperature-dependent time-resolved spectroscopy. These donor-acceptor pairs involve a
doi:10.1063/1.1946200
fatcat:f3i55uqrtvcazp7nzucbsnuebi