“…According to our recent experiments and calculation, Zn-Se-I 2 system has the total pressure 4.23 atm and the partial pressure 1.07 atm of rate-limiting species ZnI 2 under the mentioned conditions [24], which indicates that the mass transport of Zn-Se-I 2 system is dominated by diffusion-convection model during the growth of ZnSe crystal, being larger than that of ZnSe-I 2 system [25]. Thus, when the gas atoms are carried progressively to the grown surface under the relative lower pressure, the diffusion distance of the atom on the surface became short.…”