利用光学显微镜对L-丙氨酸掺杂下ZTS晶体(100)面台阶推移进行了实时观察.测量了不同掺杂浓度、过饱和度及生长温度下的台阶平均推移速度.实验结果表明:随掺杂浓度的增加,台阶平均推移速度先增加后减小,在掺杂浓度为2mol％时,台阶平均推移速度最大；而随过饱和度的增加,台阶平均推移速度线性增加.计算了台阶动力学系数与单台阶的活化能,得到掺杂后,台阶动力学系数增大,单台阶活化能减小.运用台阶动力学系数的定义,计算得到掺杂与未掺杂ZTS晶体台阶活化能的范围.同时用红外光谱实验分析了L-丙氨酸在ZTS晶体生长过程中进入晶格,进而影响台阶推移速度.
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