题目：

Transient Monolayer Structure of Rubrene on Graphite: Impact on Hole-Phonon Coupling

作者：

Yang He,^† Fabio Bussolotti,^‡,& Qian Xin,^§ Jinpeng Yang,^∥Satoshi Kera,*,^‡,⊥ Nobuo Ueno,^⊥and Steffen Duhm^*,†

单位：

^†Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-Based Functional Materials &Devices, Soochow University, Suzhou 215123, People’s Republic of China
^‡Department of Photo-Molecular Science, Institute for Molecular Science, Okazaki 444-8585, Japan
^§School of Physics, Shandong University, Jinan 250100, People’s Republic of China
^∥College of Physical Science and Technology, Yangzhou University, Jiangsu 225009, People’s Republic of China
^⊥Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522, Japan

摘要：

Charge transport in molecular thin films is often dominated by incoherent hopping processes, and charge-carrier phonon coupling plays a major role in defining mobilities. Our high resolution anglersolved ultraviolet photoelectron spectroscopy (ARUPS) study reveals the influence of molecular configuration and packing on the hole-phonon coupling in vacuum-sublimed thin films of rubrene on graphite and allows determining charge reorganization energies. In the contact layer to the substrate rubrene is well-ordered with, for low coverages, the tetracene backbone being almost parallel to the graphite surface forming a loosepacked monolayer. Increasing the coverage leads to an orientation altransition and a more tilted orientation of rubrene in a close-packed monolayer. This transition results in dramatic changes of spectral features in ARUPS including the photoelectron angular distribution of the highest occupied molecular orbital derived intensity. The charge reorganization energy, however, only changes slightly. The transient monolayer structure of rubrene on graphite allows us, thus, to demonstrate that hole-phonon coupling in organic thin films does not depend very critically on the packing structure.

影响因子：

4.536

分区情况：

二区

链接：

http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.6b04848