Degenerate layers in epitaxial ZnO films grown on sapphire substrates

H. Tampo, A. Yamada, P. Fons, H. Shibata, K. Matsubara, K. Iwata, S. Niki, K. Nakahara, H. Takasu

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

High-quality ZnO films were grown with a carrier concentration of 7.5×1016 cm-3 and a mobility of 132 cm2/V s at RT using a nitrogen-doped and vacuum-annealed buffer layer. Untreated and vacuum-annealed low-temperature (LT) buffer layers exhibited degenerate behavior which in turn effects the electrical properties of undoped ZnO films. Nitrogen-doped and vacuum-annealed buffer layers displayed little degenerate behavior and were found to enhance the electrical properties of undoped ZnO films grown on them. The dominant residual donor energy of 110 meV was found to be different.

Original languageEnglish
Pages (from-to)4412-4414
Number of pages3
JournalApplied Physics Letters
Volume84
Issue number22
DOIs
Publication statusPublished - 2004 May 31
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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  • Cite this

    Tampo, H., Yamada, A., Fons, P., Shibata, H., Matsubara, K., Iwata, K., Niki, S., Nakahara, K., & Takasu, H. (2004). Degenerate layers in epitaxial ZnO films grown on sapphire substrates. Applied Physics Letters, 84(22), 4412-4414. https://doi.org/10.1063/1.1758295