Research on Chemical and Physical Characterization for Electrical Properties of Nonlinear Optical Thin Films

用X射线衍射法研究了在1t/cm2压力下制备的VOPc薄膜和在Tp：2 0 0ﾟC、TS：2 0 0ﾟC和TE：190min条件下制备的VOPc薄膜的取向。在1t/cm~2的压力下，VOPc板的X射线衍射图显示沿衍射角方向有许多峰。这意味着，在1吨/厘米^2的压力下，VOPc板形成了许多随机取向。在分子束外延法制备的VOPc薄膜中，有两个在白云母底物的X射线衍射谱中没有观察到的峰从这些数据中明显地存在。这意味着VOPc分子之间的距离估计为3A和3.8A。VOPc分子是具有以14A为基线长度的三角形结构的平面分子。这表明VOPc薄膜中的每个分子都是平行于衬底取向的。这些结果支持了用ESCA观察到的VOPc薄膜/白云母界面之间存在强烈的相互作用。对白云母上存在两种平行取向的详细解释正在研究中。

The orientations of the VOPc plate pressed at 1ton/cm^2 and VOPc thin film produced under Tp : 200ﾟC,Ts : 200ﾟC and te : 190 min by MBE method were investigated by X-ray diffraction. The X-ray diffraction pattern of the VOPc plate pressed at 1ton/cm^2 shows a lot of peaks along diffraction angle. This means that the VOPc plate pressed at 1ton/cm^2 is formed with many random orientation. In the VOPc thin film produced by MBE method, two peaks which are not observed in the X-ray diffraction spectrum for the muscovite subsutrate, markedly exist from these data. This means that the distances between VOPc molecules are estimated as 3 A and 3.8 A.The VOPc molecule is a plane molecule having a triangular structure with 14A as a base line length. These indicate that each molecule in the VOPc thin film is oriented in parallel to the substrate. These results support the existence of strong interaction between VOPc thin film/muscovite interface observed by ESCA.Detailed explanation for the existence of two kinds of parallel orientation on the muscovite is under investigation.