Role of Initial and Final States in Molecular Spectroscopies: Example of Tetraphenyldibenzoperiflanthene (DBP) on Graphite
Role of Initial and Final States in Molecular Spectroscopies: Example of Tetraphenyldibenzoperiflanthene (DBP) on Graphite
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初始态和最终态在分子光谱中的作用：石墨上的四苯基二苯并二萘嵌苯 (DBP) 示例
DOI：
10.1021/acs.jpcc.0c05448
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发表时间：
2020
影响因子：
3.7
通讯作者：
T. Fritz
中科院分区：
文献类型：
--
作者：
T. Kirchhuebel;S. Kera;T. Munakata;N. Ueno;R. Shiraishi;T. Yamaguchi;K. Yonezawa;T. Ueba;F. Bussolotti;J. Yang;T. Yamada;R. Mori;S. Kunieda;T. Huempfner;M. Gruenewald;R. Forker;T. Fritz
基于有机半导体的电子设备是一个快速增长的技术领域。深入了解有机分子薄膜的光学和电学性质以及物理结构之间的相互作用，对优化有机分子薄膜器件具有重要意义。这需要通过不同但互补的光谱技术进行研究，其中不同数据集之间的可比性可能会变得令人困惑。因此，这项工作的核心方面是通过各种实验技术获得的光谱数据在分子状态和能级的互补图像内一致统一。在这里讨论的四苯基二苯并茂菲(DBP)在石墨(0001)表面上的外延膜的例子中，这种混淆是明显的。一个令人费解的问题是，在薄膜生长过程中，传输间隙扩大了约0.6 eV，而光学间隙几乎保持不变。此外，双光子光电子能谱(2PPE)产生了与同一未占据轨道相关的几个特征，将它们与其他光谱的结果进行关联是一项艰巨的任务。当所有的光谱数据在我们最近介绍的理论模型的框架内得到一致的解释时，这些问题就可以得到解决，该模型考虑了潜在探测过程的初始和最终状态。应用该模型，用极化能和电荷能以及进一步的物理效应与DBP薄膜的微观结构相关联地解释了所有的峰位移。
Electronic devices based on organic semiconductors are a fast-growing field of technology. A detailed understanding of the interplay between optical and electronic properties of organic molecular thin films as well as the physical structure is highly beneficial for the optimization of such devices. This requires investigations by means of different yet complementary spectroscopic techniques, where the comparability between the different data sets can become confusing. Consequently, the core aspect of this work is the consistent unification of spectroscopic data obtained by a diversity of experimental techniques within the complementary pictures of molecular states and energy levels. The confusion is obvious in the example of epitaxial films of tetraphenyldibenzoperiflanthene (DBP) on graphite(0001) surfaces being discussed here. One puzzling issue is the widening of the transport gap by around 0.6 eV during film growth, whereas the optical gap remains virtually constant. Furthermore, two-photon photoemission spectroscopy (2PPE) yields several features related to the same unoccupied orbital, and it is a nontrivial task to correlate them with the results of other spectroscopies. These issues can be resolved when all spectroscopic data are consistently interpreted in the framework of a theoretical model which was recently introduced by us, taking the initial and final states of the underlying probe processes into account. Applying that model, all peak shifts are explained here consistently by means of polarization and charging energies and further physical effects in context with the microscopic structure of the DBP thin films.
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影响因子：
3.2
作者：
C. Schuenemann;A. Petrich;R. Schulze;D. Wynands;J. Meiss;M. Hein;J. Jankowski;C. Elschner;Joerg Alex;M. Hummert;K. Eichhorn;K. Leo;M. Riede
通讯作者：
C. Schuenemann;A. Petrich;R. Schulze;D. Wynands;J. Meiss;M. Hein;J. Jankowski;C. Elschner;Joerg Alex;M. Hummert;K. Eichhorn;K. Leo;M. Riede
影响因子：
3.2
作者：
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通讯作者：
Taojun Zhuang;T. Sano;J. Kido
影响因子：
3.2
作者：
Forker, Roman;Golnik, Christian;Fritz, Torsten
通讯作者：
Fritz, Torsten
3,4,9,10-苝-四甲酸二酐、1,4,5,8-萘-四甲酸二酐和1,8-萘-二甲酸酐的气相和本体紫外光电子发射光谱。
DOI：
10.1063/1.3180818
发表时间：
2009
期刊：
The Journal of chemical physics
影响因子：
--
作者：
Jens Sauther;J. Wüsten;S. Lach;C. Ziegler
通讯作者：
C. Ziegler
影响因子：
2.3
作者：
V. Cápek;E. A. Silinsh-
通讯作者：
V. Cápek;E. A. Silinsh-