Chin. Phys. Lett.  2013, Vol. 30 Issue (11): 116801    DOI: 10.1088/0256-307X/30/11/116801
CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
Unintentional Doping Mechanisms in GaAs/Si Films Grown by Metalorganic Chemical Vapor Deposition
WANG Jun**, DENG Can, JIA Zhi-Gang, WANG Yi-Fan, WANG Qi, HUANG Yong-Qing, REN Xiao-Min
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876
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WANG Jun, DENG Can, JIA Zhi-Gang et al  2013 Chin. Phys. Lett. 30 116801
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Abstract To explain different doping effects in a buffer layer, thermally annealed interface, and upper epilayers of GaAs/Si films grown by Metalorganic Chemical Vapor Deposition (MOCVD), the behaviors of unintentional doping in GaAs/Si films are investigated in detail. A third doping mechanism of arsine impurity incorporation during the growth process of GaAs/Si films, apart from conventional mechanisms of gas phase reaction and diffusion from the silicon substrate, is proposed. The experimental results reveal that the doping behavior in the buffer layer studied is determined by the three types of doping mechanisms together. However in the thermally annealed interface and upper epilayers, the third doping mechanism is dominant. According to the third mechanism, the background carrier concentration in GaAs/Si films grown by MOCVD could be properly controlled through the arsine flow rate.
Received: 12 August 2013      Published: 30 November 2013
PACS:  68.55.Ln (Defects and impurities: doping, implantation, distribution, concentration, etc.)  
  61.72.-y (Defects and impurities in crystals; microstructure)  
  82.33.Ya (Chemistry of MOCVD and other vapor deposition methods)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/30/11/116801       OR      https://cpl.iphy.ac.cn/Y2013/V30/I11/116801
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WANG Jun
DENG Can
JIA Zhi-Gang
WANG Yi-Fan
WANG Qi
HUANG Yong-Qing
REN Xiao-Min
[1] Won R 2010 Nat. Photon. 4 498
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