中国物理B ›› 2014, Vol. 23 ›› Issue (11): 116102-116102.doi: 10.1088/1674-1056/23/11/116102

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Localized deep levels in AlxGa1-xN epitaxial films with various Al compositions

时俪洋a, 沈波a, 闫建昌b, 王军喜b, 王平a   

  1. a State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China;
    b R&D Center for Semiconductor Lighting, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  • 收稿日期:2014-04-11 修回日期:2014-05-27 出版日期:2014-11-15 发布日期:2014-11-15
  • 基金资助:

    Project supported by the National Basic Research Program of China (Grant No. 2012CB619300) and the National Natural Science Foundation of China (Grant Nos. 11174008 and 61361166007).

Localized deep levels in AlxGa1-xN epitaxial films with various Al compositions

Shi Li-Yang (时俪洋)a, Shen Bo (沈波)a, Yan Jian-Chang (闫建昌)b, Wang Jun-Xi (王军喜)b, Wang Ping (王平)a   

  1. a State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China;
    b R&D Center for Semiconductor Lighting, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  • Received:2014-04-11 Revised:2014-05-27 Online:2014-11-15 Published:2014-11-15
  • Contact: Shen Bo E-mail:bshen@pku.edu.cn
  • Supported by:

    Project supported by the National Basic Research Program of China (Grant No. 2012CB619300) and the National Natural Science Foundation of China (Grant Nos. 11174008 and 61361166007).

摘要:

By using high-temperature deep-level transient spectroscopy (HT-DLTS) and other electrical measurement techniques, localized deep levels in n-type AlxGa1-xN epitaxial films with various Al compositions (x= 0, 0.14, 0.24, 0.33, and 0.43) have been investigated. It is found that there are three distinct deep levels in AlxGa1-xN films, whose level position with respect to the conduction band increases as Al composition increases. The dominant defect level with the activation energy deeper than 1.0 eV below the conduction band closely follows the Fermi level stabilization energy, indicating that its origin may be related to the defect complex, including the anti-site defects and divacancies in AlxGa1-xN films.

关键词: localized deep levels, current-voltage, capacitance-voltage, high-temperature deep-level transient spectroscopy techniques

Abstract:

By using high-temperature deep-level transient spectroscopy (HT-DLTS) and other electrical measurement techniques, localized deep levels in n-type AlxGa1-xN epitaxial films with various Al compositions (x= 0, 0.14, 0.24, 0.33, and 0.43) have been investigated. It is found that there are three distinct deep levels in AlxGa1-xN films, whose level position with respect to the conduction band increases as Al composition increases. The dominant defect level with the activation energy deeper than 1.0 eV below the conduction band closely follows the Fermi level stabilization energy, indicating that its origin may be related to the defect complex, including the anti-site defects and divacancies in AlxGa1-xN films.

Key words: localized deep levels, current-voltage, capacitance-voltage, high-temperature deep-level transient spectroscopy techniques

中图分类号:  (Alloys )

  • 61.66.Dk
61.72.-y (Defects and impurities in crystals; microstructure) 61.72.J- (Point defects and defect clusters) 61.72.jd (Vacancies)