Evidence for temperature-dependent electron band dispersion in pentacene

被引：179

作者：

Koch, N

Vollmer, A

Salzmann, I

Nickel, B

Weiss, H

Rabe, JP

机构：

[1] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

[2] Berliner Elektronenspeicherring Gesell Synchrotro, D-12489 Berlin, Germany

[3] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

[4] Univ Magdeburg, Inst Chem, D-39106 Magdeburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.96.156803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Evidence for temperature-dependent electron band dispersion in a pentacene thin film polymorph on graphite is provided by angle- and energy-dependent ultraviolet photoelectron spectroscopy. The bands derived from the highest occupied molecular orbital exhibit dispersion of similar to 190 meV at room temperature, and similar to 240 meV at 120 K. Intermolecular electronic coupling in pentacene thin films is thus confirmed to be dependent on temperature and possibly crystal structure, as suggested by additional infrared absorption measurements.

引用

页数：4

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