Comparative analysis of characteristics of Si, Mg, and undoped GaN

K. S. Kim, C. S. Oh, W. H. Lee, K. J. Lee, G. M. Yang, C. H. Hong, E. K. Suh, K. Y. Lim, H. J. Lee, D. J. Byun

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We have grown undoped, Si- and Mg-doped GaN epilayers using metalorganic chemical vapor deposition. The grown samples have electron Hall mobilities (carrier concentrations) of 798 cm2/V s (7 × 1016 cm-3) for undoped GaN and 287 cm2/V s (2.2 × 1018 cm-3) for Si-doped GaN. Mg-doped GaN shows a high hole concentration of 8 × 1017 cm-3 and a low resistivity of 0.8 Ω cm. When compared with undoped GaN, Si and Mg dopings increase the threading dislocation density in GaN films by one order and two orders, respectively. Besides, it was observed that the Mg doping causes an additional biaxial compressive stress of 0.095 GPa compared with both undoped and Si-doped GaN layer, which is due to the incorporation of large amount of Mg atoms (4-5 × 1019 cm-3).

Original languageEnglish
Pages (from-to)505-510
Number of pages6
JournalJournal of Crystal Growth
Volume210
Issue number4
DOIs
Publication statusPublished - 2000 Mar

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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