Energy band bowing parameter in MgZnO alloys

Xu Wang; Katsuhiko Saito; Tooru Tanaka; Mitsuhiro Nishio; Takashi Nagaoka; Makoto Arita; Qixin Guo

doi:10.1063/1.4926980

Energy band bowing parameter in MgZnO alloys

Xu Wang, Katsuhiko Saito, Tooru Tanaka, Mitsuhiro Nishio, Takashi Nagaoka, Makoto Arita, Qixin Guo

Research output: Contribution to journal › Article › peer-review

48 Citations (Scopus)

Abstract

We report on bandgap bowing parameters for wurtzite and cubic MgZnO alloys from a study of high quality and single phase films in all Mg content range. The Mg contents in the MgZnO films were accurately determined using the energy dispersive spectrometer and X-ray photoelectron spectroscopy (XPS). The measurement of bandgap energies by examining the onset of inelastic energy loss in core-level atomic spectra from XPS is proved to be valid for determining the bandgap of MgZnO films. The dependence of the energy bandgap on Mg content is found to deviate downwards from linearity. Fitting of the bandgap data resulted in two bowing parameters of 2.01 ± 0.04 eV and 1.48 ± 0.11 eV corresponding to wurtzite and cubic MgZnO films, respectively.

Original language	English
Article number	022111
Journal	Applied Physics Letters
Volume	107
Issue number	2
DOIs	https://doi.org/10.1063/1.4926980
Publication status	Published - Jul 13 2015

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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abstract = "We report on bandgap bowing parameters for wurtzite and cubic MgZnO alloys from a study of high quality and single phase films in all Mg content range. The Mg contents in the MgZnO films were accurately determined using the energy dispersive spectrometer and X-ray photoelectron spectroscopy (XPS). The measurement of bandgap energies by examining the onset of inelastic energy loss in core-level atomic spectra from XPS is proved to be valid for determining the bandgap of MgZnO films. The dependence of the energy bandgap on Mg content is found to deviate downwards from linearity. Fitting of the bandgap data resulted in two bowing parameters of 2.01 ± 0.04 eV and 1.48 ± 0.11 eV corresponding to wurtzite and cubic MgZnO films, respectively.",

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AU - Wang, Xu

AU - Saito, Katsuhiko

AU - Tanaka, Tooru

AU - Nishio, Mitsuhiro

AU - Nagaoka, Takashi

AU - Arita, Makoto

AU - Guo, Qixin

PY - 2015/7/13

Y1 - 2015/7/13

N2 - We report on bandgap bowing parameters for wurtzite and cubic MgZnO alloys from a study of high quality and single phase films in all Mg content range. The Mg contents in the MgZnO films were accurately determined using the energy dispersive spectrometer and X-ray photoelectron spectroscopy (XPS). The measurement of bandgap energies by examining the onset of inelastic energy loss in core-level atomic spectra from XPS is proved to be valid for determining the bandgap of MgZnO films. The dependence of the energy bandgap on Mg content is found to deviate downwards from linearity. Fitting of the bandgap data resulted in two bowing parameters of 2.01 ± 0.04 eV and 1.48 ± 0.11 eV corresponding to wurtzite and cubic MgZnO films, respectively.

AB - We report on bandgap bowing parameters for wurtzite and cubic MgZnO alloys from a study of high quality and single phase films in all Mg content range. The Mg contents in the MgZnO films were accurately determined using the energy dispersive spectrometer and X-ray photoelectron spectroscopy (XPS). The measurement of bandgap energies by examining the onset of inelastic energy loss in core-level atomic spectra from XPS is proved to be valid for determining the bandgap of MgZnO films. The dependence of the energy bandgap on Mg content is found to deviate downwards from linearity. Fitting of the bandgap data resulted in two bowing parameters of 2.01 ± 0.04 eV and 1.48 ± 0.11 eV corresponding to wurtzite and cubic MgZnO films, respectively.

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Energy band bowing parameter in MgZnO alloys

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