Electronic structures of the highest occupied molecular orbital bands of a pentacene ultrathin film

We report the energy dispersions of the highest occupied molecular orbitals (HOMO)-derived bands of a pentacene (Pn) thin film, whose in-plane structure resembles closely that of the ab plane of a low-density bulk Pn phase. Our present photoemission result indicates that the overlap of the pi-orbita...

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Bibliographic Details
Published in:Physical review letters 2007-06, Vol.98 (24), p.247601-247601, Article 247601
Main Authors: Kakuta, Haruya, Hirahara, Toru, Matsuda, Iwao, Nagao, Tadaaki, Hasegawa, Shuji, Ueno, Nobuo, Sakamoto, Kazuyuki
Format: Article
Language:English
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Summary:We report the energy dispersions of the highest occupied molecular orbitals (HOMO)-derived bands of a pentacene (Pn) thin film, whose in-plane structure resembles closely that of the ab plane of a low-density bulk Pn phase. Our present photoemission result indicates that the overlap of the pi-orbitals of adjacent Pn molecules is larger than what was expected from theoretical calculations. Further, of the two HOMO-derived bands, the large dispersion width of the band with higher binding energy suggests that this one mainly contributes to the bandlike charge transport in a Pn crystal.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.98.247601