Phase separation in Zn-doped InGaN grown by metalorganic chemical vapor deposition

Z. C. Feng, T. R. Yang, R. Liu, T. S.A. Wee

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Zn-doped InGaN thin films were deposited on GaN/sapphire by metalorganic chemical vapor deposition, and studied by a combination of high-resolution X-ray diffraction (HR-XRD), micro-photoluminescence (PL) and secondary ion mass spectrometry (SIMS). Indium phase separation is studied comparatively. HR-XRD exhibits a GaN band and a single band from InGaN for samples without phase separation, but two InGaN bands corresponding to different x(In) for samples with phase separation. PL excitation power dependence measurements reveal 2 sets of InGaN PL emissions for samples with phase separation, but only 1 set for samples without phase separation. SIMS data showed that phase separated InGaN:Zn films possess a high Zn concentration near the InGaN-GaN interface and non-uniform distributions of In and Zn contents, which are in contrast with data from InGaN:Zn films with no In-phase separation.

Original languageEnglish
Pages (from-to)39-43
Number of pages5
JournalMaterials Science in Semiconductor Processing
Volume5
Issue number1
DOIs
Publication statusPublished - 2002 Feb 1

Keywords

  • InGaN
  • MOCVD
  • Phase separation

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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