Journal of Xidian University ›› 2016, Vol. 43 ›› Issue (3): 167-171.doi: 10.3969/j.issn.1001-2400.2016.03.029

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Kinetic Monte Carlo simulation of GaN epitaxy

FENG Lansheng1;GUO Runqiu1;ZHANG Jincheng2   

  1. (1. School of Mechano-electronic Engineering, Xidian Univ., Xi'an  710071, China;
    2. School of Microelectronics, Xidian Univ., Xi'an  710071, China)
  • Received:2015-11-11 Online:2016-06-20 Published:2016-07-16
  • Contact: FENG Lansheng E-mail:fenglansheng001@163.com

Abstract:

A chemical reaction mode about GaN epitaxy in MOCVD is presented. We simulate the growth process of GaN in the vertical-spray MOCVD system on this mode using the KMC mothod. The result shows that adductive reaction mostly occurs at a lower temperature and pyrolytic reaction mostly occurs at a high temperature. And the growth rate increases with increasing temperature. This feature determines the surface morphology of the material. We also include the diffusion and desorption process of the reaction particle by the KMC method. These processes depend mostly on temperature and ultimately affect the surface morphology of the GaN material.

Key words: GaN, kinetic Monte Carlo(KMC), reaction model, reaction kinetics


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