Compensation effect of Mg-doped a- and c-plane GaN films grown by metalorganic vapor phase epitaxy

Daisuke Iida, Kenta Tamura, Motoaki Iwaya, Satoshi Kamiyama, Hiroshi Amano, Isamu Akasaki

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

The electrical and optical properties of Mg-doped a- and c-plane GaN films grown by metalorganic vapor phase epitaxy were systematically investigated. The photoluminescence spectra of Mg-doped a- and c-plane GaN films exhibit strong emissions related to deep donors when Mg doping concentrations are above 1×1020 cm-3 and 5×1019 cm -3, respectively. The electrical properties also indicate the existence of compensating donors because the hole concentration decreases at such high Mg doping concentrations. In addition, we estimated the N D/NA compensation ratio of a- and c-plane GaN by variable-temperature Hall effect measurement. The obtained results indicate that the compensation effect of the Mg-doped a-plane GaN films is lower than that of the Mg-doped c-plane GaN films. © 2010 Elsevier B.V. All rights reserved.
Original languageEnglish (US)
Pages (from-to)3131-3135
Number of pages5
JournalJournal of Crystal Growth
Volume312
Issue number21
DOIs
StatePublished - Oct 15 2010
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-09-21

ASJC Scopus subject areas

  • Materials Chemistry
  • Inorganic Chemistry
  • Condensed Matter Physics

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