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Time-resolved Spectroscopy of the violet luminescence of undoped AlN

  • R. Freitag (a1) (a2), K. Thonke (a1) (a2), R. Sauer (a1) (a2), D. G. Ebling (a1) (a2) and L. Steinke (a1) (a2)...

Abstract

We report on the time-resolved luminescence of the defect-related violet band from undoped AlN epitaxial layers grown on sapphire and SiC. For both measurements in photoluminescence and in cathodoluminescence a decay of algebraic nature at long times is observed. This is typical for donor-acceptor pair transitions. We compare the behavior of this band to that of the generically yellow luminescence of GaN.

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