为确定HgI2晶体的最佳生长温度,根据邻位面生长的台阶动力学,推导出HgI2分子在(001)面扩散激活能ES D约为0.33 eV,进而采用物理气相沉积法的基本理论推算了不同升华温度T1下HgI2晶体生长的最低温度Tmin。结果表明,计算结果与实际晶体生长温度基本一致。该结果为HgI2单晶体、多晶薄膜、单晶薄膜沉积工艺的优化提供了依据。
The activation energy of HgI2 molecule diffusion on(001) was investigated to be 0.33 eV according to step-flow growth kinetics of vicinal surface in vapour.The lowest growth temperature,Tmin,for the optimization of crystal growth was then deduced under different sublimation temperature.The results show that the value calculated is in good accordance with that of the actual HgI2 crystal growth by physical vapour deposition,which is beneficial to craft adjust to HgI2 single-crystal,poly-crystalline thin film and single-crystal film.