中文摘要：

利用X射线光电子能谱（XPS）,同步辐射紫外光电子能谱（SRUPS）,近边X射线吸收精细结构（NEXAFS）以及原子力显微镜（AFM）等技术研究了苝四甲酸二酐（PTCDA）与Au（111）的界面电子结构、PTCDA分子取向及有机薄膜的表面形貌.SRUPS价带谱显示,伴随PTCDA分子的微量沉积（0·5ML）,位于费米能级附近Au的表面电子态迅速消失,但却观察不到明显的界面杂化态,这说明PTCDA分子和Au（111）界面间存在弱电子传输过程,但并没有发生明显的化学反应.角分辨NEXAFS以及SRUPS结果证明PTCDA分子是平铺在衬底表面.根据Au4f7/2和C1s峰积分强度随薄膜厚度的变化以及AFM图像可知,PTCDA分子在Au（111）表面是一种典型的Stranski-Krastanov生长模式,即先层状生长,再岛状生长,并且在层状生长到岛状生长的转变过程中,存在有机分子的去润湿过程.

英文摘要：

The interface electronic structure, molecular orientation and surface morphology of the organic semiconductor 3,4,9,10-perylene tetracarboxylic dianhydride （PTCDA） grown on Au （111） surface have been studied by means of X-ray photoelectron spectroscopy （XPS）, synchrotron radiation ultraviolet photoelectron spectroscopy （SRUPS）, near edge X-ray absorption fine structure spectroscopy （NEXAFS） and atomic force microscopy （AFM）. It can be seen from the SRUPS results that the Shockley-type Au （111） surface state near the Fermi level extinguishes immedia tely after sub-monolayer of PTCDA is deposited onto the Au surface without the emergence of interface hybrid state. This indicates that a charge transfer process takes place at the interface between PTCDA molecule and Au（111）, but does not lead to strong chemical reaction. Angle dependent NEXAFS and SRUPS show that the PTCDA overlayers are ordered and the molecules lie flatly on the Au（111） surface. According to the AFM images and the evolution of Au 4f_7/2 and C 1s integral intensities with increasing film thickness, the typical Stranski-Krastanov growth mode is proposed for PTCDA deposition on Au（111） surface, that is, layer by layer growth followed by island growth mode. The Dewetting transition occurs between the 2D and 3D growth modes.