Highest-Occupied-Molecular-Orbital Band Dispersion of Rubrene Single Crystals as Observed by Angle-Resolved Ultraviolet Photoelectron Spectroscopy
Highest-Occupied-Molecular-Orbital Band Dispersion of Rubrene Single Crystals as Observed by Angle-Resolved Ultraviolet Photoelectron Spectroscopy
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DOI：
10.1103/physrevlett.104.156401
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发表时间：
2010-04-16
影响因子：
8.6
通讯作者：
Ishii, Hisao
中科院分区：
文献类型：
--
作者：
Machida, Shin-ichi;Nakayama, Yasuo;Ishii, Hisao
用角分辨紫外光电子能谱研究了红荧烯单晶的电子结构。观察到最高占据分子轨道衍生带的清晰能量色散，并且发现沿良好堆叠方向的色散宽度为沿着0.4 eV。孔的有效质量估计为0.65（+/- 0.1）m（0）。结果表明，红荧烯单晶中的载流子传导机制可以用能带输运理论来描述。
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.