期刊
APPLIED PHYSICS LETTERS
卷 96, 期 16, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3404182
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资金
- Laboratory Directed Research and Development program at Sandia National Laboratories
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering
Deep level defects in n-type GaN nanowires (NWs) with and without an epitaxially-grown AlGaN shell were compared using photoconductivity-mode deep level optical spectroscopy. Hole photoemission from a defect state located approximately 2.6 eV above the valence band was observed for GaN NWs but was not observed for AlGaN/GaN core-shell NWs, indicating that this deep level is associated with a GaN surface state. Identifying GaN NW surface states and developing an effective passivation mechanism is expected to aid in the understanding and improvement of GaN NW-based sensors and optoelectronics. (C) 2010 American Institute of Physics. [doi:10.1063/1.3404182]
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