Time-Resolved Electroluminescence of AlGaN-Based Light-Emitting Diodes with Emission at 285 nm

  • Shatalov, M.
  • Chitnis, A.
  • Mandavilli, V.
  • Pachipulusu, R.
  • Zhang, J. P.
  • Adivarahan, V.
  • Wu, S.
  • Simin, Grigory
  • Khan, M. Asif
  • Tamulaitis, G.
  • Sereika, A.
  • Yilmaz, I.
  • Shur, M. S.
  • Gaska, R.
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Publication date
January 2003
Publisher
Scholar Commons

Abstract

We present a study on the time evolution of the electroluminescence(EL)spectra of AlGaN-based deep ultraviolet light-emitting diodes(LEDs) under pulsed current pumping. The ELspectra peaks at 285 nm and 330 nm are found to result from recombination involving band-to-band and free carriers to deep acceptor level transitions. The 330 nm long-wavelength transitions to deep acceptor levels in the p-AlGaN layer as well as the nonradiative processes significantly influence the LED internal quantum efficiency

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