Electronic states of a single layer of pentacene: Standing-up and flat-lying configurations

被引:35
作者
Betti, Maria Grazia
Kanjilal, Aloke
Mariani, Carlo
机构
[1] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
[2] INFM, CNR, Ctr Nanostruct & Biosyst Surfaces S 3, I-41100 Modena, Italy
关键词
D O I
10.1021/jp074365i
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The electronic properties of a single layer (SL) of pentacene molecules are investigated by high-resolution UV photoemission and near-edge X-ray absorption spectroscopy in different configurations of the SL, either standing up on an aromatic self-assembled monolayer or planar on a bare Cu(001) substrate. The weakly interacting pentacene molecules in the standing-up SL present a semiconducting character, and the empty states distribution reflects that of gas-phase pentacene, while the planar pentacene-Cu system shows a metallic interface with redistribution of the empty molecular states. The highest-occupied molecular orbital lineshape in the weakly interacting SL shows a double structure, attributed to two nonequivalent molecules in the ordered configuration.
引用
收藏
页码:12454 / 12457
页数:4
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