Valence-Band Discontinuity at the AIN/Si Interface

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作者
Ishikawa, Hiroyasu [1 ]
Zhang, Baijun [1 ]
Egawa, Takashi [1 ]
Jimbo, Takashi [2 ]
机构
[1] Res. Ctr. for Nano-Device and System, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
[2] Dept. of Environmental Technology, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
关键词
Aluminum nitride - Electric potential - Electric resistance - Gallium nitride - Light emitting diodes - Metallorganic chemical vapor deposition - Ohmic contacts - Silicon - X ray photoelectron spectroscopy;
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摘要
The major problems of GaN-based light-emitting diodes on Si are their high series resistances and high operating voltages due to the large band discontinuity at the AlN/Si interface. We have observed the valence-band discontinuity at the AlN/Si interface using X-ray photoelectron spectroscopy (XPS). The valence- and conduction-band discontinuity values at the AlN/Si interface were found to be 2.8 ± 0.4 eV and 2.3 ± 0.4 eV, respectively.
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页码:6413 / 6414
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