中国物理B ›› 2013, Vol. 22 ›› Issue (10): 106106-106106.doi: 10.1088/1674-1056/22/10/106106

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

Effect of InxGa1-xN “continuously graded” buffer layer on InGaN epilayer grown by metalorganic chemical vapor deposition

钱卫宁a b, 宿世臣a, 陈弘b, 马紫光b, 朱克宝a, 何苗a, 卢平元a, 王耿a, 卢太平b, 杜春花b, 王巧a, 吴汶波a, 张伟伟a   

  1. a Laboratory of Nanophotonic Functional Materials and Devices, Institute of Opto-electronic Materials & Technology, South China Normal University, Guangzhou 510631, China;
    b Key Laboratory for Renewable Energy, Chinese Academy of Sciences, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condense Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2013-01-04 修回日期:2013-03-20 出版日期:2013-08-30 发布日期:2013-08-30
  • 基金资助:
    Project supported by the National High Technology Research and Development Program of China (Grant Nos. 2011AA03A112, 2011AA03A106, and 2013AA03A101), the National Natural Science Foundation of China (Grant Nos. 11204360, 61210014, and 61078046), the Science & Technology Innovation Program of the Department of Education of Guangdong Province, China (Grant No. 2012CXZD0017), the Industry-Academia-Research Union Special Fund of Guangdong Province, China (Grant No. 2012B091000169), and the Science & Technology Innovation Platform of Industry-Academia-Research Union of Guangdong Province-Ministry Cooperation Special Fund, China (Grant No. 2012B090600038).

Effect of InxGa1-xN “continuously graded” buffer layer on InGaN epilayer grown by metalorganic chemical vapor deposition

Qian Wei-Ning (钱卫宁)a b, Su Shi-Chen (宿世臣)a, Chen Hong (陈弘)b, Ma Zi-Guang (马紫光)b, Zhu Ke-Bao (朱克宝)a, He Miao (何苗)a, Lu Ping-Yuan (卢平元)a, Wang Geng (王耿)a, Lu Tai-Ping (卢太平)b, Du Chun-Hua (杜春花)b, Wang Qiao (王巧)a, Wu Wen-Bo (吴汶波)a, Zhang Wei-Wei (张伟伟)a   

  1. a Laboratory of Nanophotonic Functional Materials and Devices, Institute of Opto-electronic Materials & Technology, South China Normal University, Guangzhou 510631, China;
    b Key Laboratory for Renewable Energy, Chinese Academy of Sciences, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condense Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2013-01-04 Revised:2013-03-20 Online:2013-08-30 Published:2013-08-30
  • Contact: Chen Hong, He Miao E-mail:hchen@aphy.iphy.ac.cn;herofate@126.com
  • Supported by:
    Project supported by the National High Technology Research and Development Program of China (Grant Nos. 2011AA03A112, 2011AA03A106, and 2013AA03A101), the National Natural Science Foundation of China (Grant Nos. 11204360, 61210014, and 61078046), the Science & Technology Innovation Program of the Department of Education of Guangdong Province, China (Grant No. 2012CXZD0017), the Industry-Academia-Research Union Special Fund of Guangdong Province, China (Grant No. 2012B091000169), and the Science & Technology Innovation Platform of Industry-Academia-Research Union of Guangdong Province-Ministry Cooperation Special Fund, China (Grant No. 2012B090600038).

摘要: In this paper we report on the effect of an InxGa1-xN continuously graded buffer layer on an InGaN epilayer grown on a GaN template. In our experiment, three types of buffer layers including constant composition, continuously graded composition, and the combination of constant and continuously graded composition are used. Surface morphologies, crystalline quality, indium incorporations, and relaxation degrees of InGaN epilayers with different buffer layers are investigated. It is found that the InxGa1-xN continuously graded buffer layer is effective to improve the surface morphology, crystalline quality, and the indium incorporation of the InGaN epilayer. These superior characteristics of the continuously graded buffer layer can be attributed to the sufficient strain release and the reduction of dislocations.

关键词: InGaN, reciprocal space map, indium incorporation, surface morphology

Abstract: In this paper we report on the effect of an InxGa1-xN continuously graded buffer layer on an InGaN epilayer grown on a GaN template. In our experiment, three types of buffer layers including constant composition, continuously graded composition, and the combination of constant and continuously graded composition are used. Surface morphologies, crystalline quality, indium incorporations, and relaxation degrees of InGaN epilayers with different buffer layers are investigated. It is found that the InxGa1-xN continuously graded buffer layer is effective to improve the surface morphology, crystalline quality, and the indium incorporation of the InGaN epilayer. These superior characteristics of the continuously graded buffer layer can be attributed to the sufficient strain release and the reduction of dislocations.

Key words: InGaN, reciprocal space map, indium incorporation, surface morphology

中图分类号:  (III-V and II-VI semiconductors)

  • 61.72.uj
68.35.Dv (Composition, segregation; defects and impurities) 68.37.Ps (Atomic force microscopy (AFM)) 78.60.Lc (Optically stimulated luminescence)