Molecular Orientation Dependence of the Ionization Energy of Pentacene in Thin Films

被引:4
|
作者
Heimel, Georg [1 ]
Koch, Norbert [1 ]
机构
[1] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany
来源
关键词
AUGMENTED-WAVE METHOD; WORK FUNCTION; METALS;
D O I
10.1007/978-3-540-95930-4_23
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
An isolated individual molecule clearly has only one ionization energy. For ordered molecular assemblies, however, multiple values have been found depending on the orientation of the molecules relative to a supporting substrate. This intriguing observation is rationalized here for the prototypical molecule pentacene, in terms of intrinsic "surface dipoles" built into the molecules, which collectively give rise to the orientation dependence of the molecular ionization energy.
引用
收藏
页码:141 / 145
页数:5
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