Measurement of semi-polar (11–22) plane AlN/GaN heterojunction band offsets by X-ray photoelectron spectroscopy
2018
The valence band offset (VBO) of the semi-polar (11–22) plane AlN/GaN heterojunction has been directly measured by X-ray photoelectron spectroscopy. The VBO is determined to be 0.7 ± 0.2 eV and the conduction band offset is deduced to be 2.1 ± 0.2 eV. The VBO of semi-polar AlN/GaN heterojunctions is smaller than the C-plane AlN/GaN heterojunctions due to the polarization effects partially eliminated.
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