Temperature-Dependence of Exciton Radiative Recombination in (Al,Ga)N/GaN Quantum Wells Grown on a-Plane GaN Substrates

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概要

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• This article presents the dynamics of excitons in a-plane (Al,Ga)N/GaN single quantum wells of various thicknesses grown on bulk GaN substrates. For all quantum well samples, recombination is observed to be predominantly radiative in the low-temperature range. At higher temperatures, the escape of charge carriers from the quantum well to the (Al,Ga)N barriers is accompanied by a reduction in internal quantum efficiency. Based on the temperature-dependence of time-resolved photoluminescence experiments, we also show how the local disorder affects the exciton radiative lifetime at low temperature and the exciton non-radiative lifetime at high temperature.

• 2013-08-25

著者

• Deveaud Benoit

  Institute Of Quantum Electronics And Photonics Swiss Federal Institute Of Technology-lausanne

• SUSKI Tadeusz

  Institute of High Pressure Physics PAS

• TEISSEYRE Henryk

  Institute of Physics PAS

• GRZEGORY Izabella

  Institute of High Pressure PAS

• Grandjean Nicolas

  Institute of Condensed Matter Physics, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland

• Giraud Etienne

  Institute of Condensed Matter Physics, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland

• Lefebvre Pierre

  CNRS, Laboratoire Charles Coulomb, UMR5221, 34095 Montpellier, France

• Ganiere Jean-Daniel

  Institute of Condensed Matter Physics, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland

• Corfdir Pierre

  Institute of Condensed Matter Physics, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland

• Dussaigne Amélie

  Institute of Condensed Matter Physics, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland

• Shahmohammadi Mehran

  Institute of Condensed Matter Physics, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland

• Phillips Richard

  Cavendish Laboratory, University of Cambridge, CB3 0HE Cambridge, United Kingdom

• Corfdir Pierre

  Institute of Condensed Matter Physics, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland

• Shahmohammadi Mehran

  Institute of Condensed Matter Physics, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland

• Grzegory Izabella

  Institute of High Pressure Physics, Polish Academy of Sciences, 01-142 Warsaw, Poland

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