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Optical Characterisation of AlGaN Epitaxial Layers and GaN/AlGaN Quantum Wells

  • S. T. Pendlebury
  • , P. Lynam
  • , D. J. Mowbray
  • , P. J. Parbrook
  • , D. A. Wood
  • , M. Lada
  • , J. P. O'Neill
  • , A. G. Cullis
  • , M. S. Skolnick

Research output: Contribution to journalArticlepeer-review

Abstract

We report optical characterisation of AlGaN epitaxial layers and GaN/AlGaN quantum wells, grown by metalorganic vapour phase epitaxy on sapphire substrates. A combination of emission (photoluminescence) and absorption (photoluminescence excitation) spectroscopy provides information on the nature of the electronic states and on built-in electric fields resulting from piezoelectric and spontaneous polarisation effects. These fields are found to be considerably smaller than in previously reported work on similar structures.

Original languageEnglish
Pages (from-to)871-875
Number of pages5
JournalPhysica Status Solidi (A) Applied Research
Volume188
Issue number2
DOIs
Publication statusPublished - Nov 2001
Externally publishedYes

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