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MOVPE growth of GaN on Si(1 1 1) substrates

  • Armin Dadgar
  • , M. Poschenrieder
  • , J. Bläsing
  • , O. Contreras
  • , F. Bertram
  • , T. Riemann
  • , A. Reiher
  • , M. Kunze
  • , I. Daumiller
  • , A. Krtschil
  • , A. Diez
  • , A. Kaluza
  • , A. Modlich
  • , M. Kamp
  • , J. Christen
  • , Fernando Ponce
  • , E. Kohn
  • , A. Krost

Research output: Contribution to journalConference articlepeer-review

Abstract

Metalorganic chemical vapor phase deposition of thick, crack-free GaN on Si can be performed either by patterning of the substrate and selective growth or by low-temperature (LT) AlN interlayers enabling very thick GaN layers. A reduction in dislocation density from 1010 to 109 cm-2 is observed for LT-AlN interlayers which can be further improved using monolayer thick SixNy in situ masking and subsequent lateral overgrowth. Crack-free AlGaN/GaN transistor structures show high room temperature mobilities of 1590 cm2/Vs at 6.7 × 1012cm-2 sheet carrier concentration. Thick crack-free light emitters have a maximum output power of 0.42 mW at 498 nm and 20 mA.

Original languageEnglish (US)
Pages (from-to)556-562
Number of pages7
JournalJournal of Crystal Growth
Volume248
Issue numberSUPPL.
DOIs
StatePublished - Feb 2003
EventProceedings of the eleventh international conference on MOVPE XI - Berlin, Germany
Duration: Jun 3 2002Jun 7 2002

Keywords

  • A1. Si(1 1 1) substrates
  • A3. Metalorganic vapor phase epitaxy
  • B1. GaN

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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