Studies on single-phase, indium-rich In1-xGaxN epilayers grown by high-pressure CVD

ORAL

Abstract

While significant progress in the growth of high quality group III-nitride epitaxial layers has been made during the last decades, the growth of indium rich InGaN epilayers at processing conditions compatible with wide band gap group III-nitrides is still very challenging, especially under low-pressure MOCVD growth conditions. Utilization of elevated pressures to stabilize the growth surface lead to elevated growth temperatures and opened a window for the growth of single-phase material with indium concentrations well above 30{\%}. We present growth conditions and results on structural quality and optical properties of single-phase indium-rich In$_{1-x}$Ga$_{x}$N epilayers. The layers were studied by X-ray diffraction, Raman spectroscopy, atomic force microscopy, optical absorption and IR reflectance spectroscopy, and photoluminescence spectroscopy.

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Authors

  • Max Buegler

    Dept. of Physics and Astronomy, Georgia State University, Atlanta, GA

  • Mustafa Alevli

    Dept. of Physics and Astronomy, Georgia State University, Atlanta, GA

  • Ramazan Atalay

    Dept. of Physics and Astronomy, Georgia State University, Atlanta, GA

  • Goksel Durkaya

    Dept. of Physics and Astronomy, Georgia State University, Atlanta, GA

  • Jielei Wang

    Dept. of Physics and Astronomy, Georgia State University, Atlanta, GA

  • Indika Senevirathna

    Dept. of Physics and Astronomy, Georgia State University, Atlanta, GA

  • Sampath Gamage

    Dept. of Physics and Astronomy, Georgia State University, Atlanta, GA

  • Nikolaus Dietz

    Dept. of Physics and Astronomy, Georgia State University, Atlanta, GA, Prof. Dr

  • Ronny Kirste

    Institut fuer Festkoerperphysik, Technische Universitaet Berlin, Berlin, Germany

  • Jan-Hindrik Schulze

    Institut fuer Festkoerperphysik, Technische Universitaet Berlin, Berlin, Germany

  • Axel Hoffmann

    Institut fuer Festkoerperphysik, Technische Universitaet Berlin, Berlin, Germany

  • Ramon Collazo

    Department of Materials Science, North Carolina State University, Raleigh, NC

  • Zlatko Sitar

    Department of Materials Science, North Carolina State University, Raleigh, NC

  • Muhammad Jamil

    ECE Department UNC Charlotte, Charlotte, NC

  • Ian Ferguson

    ECE Department UNC Charlotte, Charlotte, NC