GaN films and GaN/AlGaN quantum wells grown by plasma assisted molecular beam epitaxy using a high density radical source

Research output: Contribution to journalArticleScientificpeer-review

Researchers

  • Yvon Cordier
  • Benjamin Damilano
  • Phannara Aing
  • Catherine Chaix
  • Florence Linez
  • Filip Tuomisto

  • Philippe Vennegues
  • Eric Frayssinet
  • Denis Lefebvre
  • Marc Portail
  • Maud Nemoz

Research units

  • CNRS, Centre National de la Recherche Scientifique, Inst Astrophys Paris
  • RIBER SA

Abstract

The behavior of a high density radical source for the plasma assisted molecular beam epitaxy of GaN and AlGaN compounds is studied and compared with the one of a conventional plasma source. Plasma light emission correlates with the GaN growth rate. Both attest to the better efficiency of the new source for producing active nitrogen species with resulting growth rates well beyond 1 mu m/h. The present study shows that GaN films with equivalent structural and optical quality can be grown even with a growth rate enhancement by a factor of 5. The purity of the grown films is investigated as well as point defects. Positron annihilation shows that plasma conditions can be tuned in order to limit the increase of the gallium-vacancy related complexes density by about 2x10(16) cm(-3) while reaching growth rates as high as 2.1 mu m/h. (C) 2015 Elsevier B.V. All rights reserved.

Details

Original languageEnglish
Pages (from-to)165-171
Number of pages7
JournalJournal of Crystal Growth
Volume433
Publication statusPublished - 1 Jan 2016
MoE publication typeA1 Journal article-refereed

    Research areas

  • Crystal morphology, Impurities, Point defects, Molecular beam epitaxy, Quantum wells, Nitrides, OPTICAL-PROPERTIES, QUALITY, HETEROSTRUCTURES

ID: 1499862