Highest-Occupied-Molecular-Orbital Band Dispersion of Rubrene Single Crystals as Observed by Angle-Resolved Ultraviolet Photoelectron Spectroscopy

被引:167
作者
Machida, Shin-ichi [1 ]
Nakayama, Yasuo [2 ]
Duhm, Steffen [1 ]
Xin, Qian [1 ]
Funakoshi, Akihiro [1 ]
Ogawa, Naoki [1 ]
Kera, Satoshi [1 ]
Ueno, Nobuo [1 ]
Ishii, Hisao [1 ,2 ]
机构
[1] Chiba Univ, Grad Sch Adv Integrat Sci, Chiba 2638522, Japan
[2] Chiba Univ, Ctr Frontier Sci, Chiba 2638522, Japan
关键词
CHARGE-TRANSPORT; ORGANIC SEMICONDUCTOR; ELECTRONIC-STRUCTURE; THIN-FILMS; TRANSISTORS; PENTACENE; PHOTOEMISSION; MOBILITY; SPECTRA; ENERGY;
D O I
10.1103/PhysRevLett.104.156401
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The electronic structure of rubrene single crystals was studied by angle-resolved ultraviolet photoelectron spectroscopy. A clear energy dispersion of the highest occupied molecular orbital-derived band was observed, and the dispersion width was found to be 0.4 eV along the well-stacked direction. The effective mass of the holes was estimated to be 0.65(+/- 0.1)m(0). The present results suggest that the carrier conduction mechanism in rubrene single crystals can be described within the framework of band transport.
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页数:4
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