Photoemission and STM Study of the Morphology and Barrier Heights at the Interface between Perylene and Noble Metal (111) Surfaces
Photoemission and STM Study of the Morphology and Barrier Heights at the Interface between Perylene and Noble Metal (111) Surfaces
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苝和贵金属 (111) 表面界面形貌和势垒高度的光电发射和 STM 研究
DOI：
10.1021/jp1008626
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
B. Parkinson
中科院分区：
文献类型：
--
作者：
K. Manandhar;B. Parkinson
利用紫外光电子能谱（UPS）和X射线光电子能谱（XPS）以及扫描隧道显微镜（STM）研究了在Ag（111）和Cu（111）衬底上不同覆盖率的苝薄膜和近单层膜。在Perylene/Ag（111）和Perylene/Cu（111）之间形成肖特基结，其空穴势垒高度分别为1.30和1.10 eV。当与二萘嵌苯/Au（111）界面的先前测量相结合时，在作为功函数的函数的空穴势垒高度的曲线图中，斜率S被计算为0.53，其高于不含杂原子的其它平面聚芳族烃的S值，表明斜率是材料特异性的。在沉积过程中，最初形成约4埃厚的润湿层，然后形成岛，与Stranski−Krastanov（SK）生长一致。室温STM研究标称1 ML的苝薄膜显示符合-II和双行阵列结构与相称的晶格在Ag（111）…
Various coverages of perylene thin films on Ag(111) and Cu(111) were investigated using ultraviolet and X-ray photoelectron spectroscopy (UPS and XPS) and near monolayer (ML) films by scanning tunneling microscopy (STM). A Schottky junction is formed between perylene/Ag(111) and perylene/Cu(111) with hole barrier heights of 1.30 and 1.10 eV, respectively. When combined with previous measurements of the perylene/Au(111) interface, the slope S, in the plot of the hole barrier height as a function of work function, was calculated to be 0.53, which is higher than the S value for the other planar polyaromatic hydrocarbons without heteroatoms, revealing that the slope is material specific. During deposition a wetting layer of approximately 4 A thickness was initially formed followed by island formation, consistent with Stranski−Krastanov (SK) growth. Room temperature STM investigations of nominal one ML perylene films revealed coincidence-II and double row array structures with commensurate lattices on Ag(111) ...