Strain and photoluminescence characterization of cubic (In,Ga) N films grown on GaAs(001) substrates

X. L. Sun, Y. T. Wang, Hui Yang, L. X. Zheng, D. P. Xu, J. B. Li, Z. G. Wang

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10 Scopus citations

Abstract

Cubic InxGa1-xN films were successfully grown on GaAs(001) substrates by metalorganic chemical-vapor deposition. The values of A: content ranging from 0.10 to 0.24 obtained at different growth conditions were measured by double-crystal x-ray diffraction (XRD). The perpendicular and parallel elastic strain of the In0.2Ga0.8N layer, ε = 0.4% and εy=-0.4% for GaN and ε = 0.37% and ε =-0.37% for InGaN, respectively, were derived using the XRD measurements. The inhomogeneous strain and the average grain size of the In0.2Ga0.8N/GaN films were also studied by XRD. Photoluminescence spectra were used to measure the optical characterization of the InxGa1-xN thin films with different In composition, and the near-band-edge emission dependence of cubic InxGa1-xN on the x value is nearly linear with In content x≤0.24.

Original languageBritish English
Pages (from-to)3711-3714
Number of pages4
JournalJournal of Applied Physics
Volume87
Issue number8
DOIs
StatePublished - 15 Apr 2000

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