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Investigation of MOCVD growth of AlxGa1-xAs/GaAs and AlxGa1-xAs/GaAs/AlxGa1-xAs/G aAs multilayer structures with high Al content

  • Gao Hongkai
  • , Yun Feng
  • , Zhang Jikang
  • , Hou Xun
  • , Gong Ping

Research output: Contribution to journalArticlepeer-review

Abstract

Mirror-like surfaces of AlxGa1-xAs/GaAs and AlxGa1-xAs/GaAs/AlxGa1-x As/GaAs multi-layer structures with high aluminium content (ifx = 0.83) grown on semi-insulating GaAs substrates were obtained in a self-made atmospheric pressure MOCVD system. The thickness of the layers varied from several nm to 10 μm. The aluminium content (x) of the AlxGa1-xAs layers could be controlled from 0 to 0.83. The high quality of the GaAs and AlxGa1-xAs epilayers has been assessed from double crystal X-ray rocking curve measurements. A minority-carrier diffusion length of 4.02 μm for a Zn-doped GaAs epilayer (Na = 2×1019 cm-3) was obtained. High purity GaAs with n300K = 1.7×1015 cm-3, μm300K = 5900 cm2/V·s, n77K = 1.4×1015 cmand μm77K = 55500 cm2/V⋯s has been obtained.

Original languageEnglish
Pages (from-to)428-433
Number of pages6
JournalJournal of Crystal Growth
Volume107
Issue number1-4
DOIs
StatePublished - 1 Jan 1991
Externally publishedYes

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