Dispersion of electron-hole excitations in pentacene along (100)

被引：18
|
作者：
Knupfer, M.
Berger, H.
机构：
[1] Leibniz Inst Festkorper & Werkstoffforsch Dresden, D-01069 Dresden, Germany
[2] Ecole Polytech Fed Lausanne, Inst Phys Complex Matter, CH-1015 Lausanne, Switzerland
来源：
CHEMICAL PHYSICS | 2006年 / 325卷 / 01期
关键词：
organic semiconductors; EELS; pentacene; excitons;
D O I：
10.1016/j.chemphys.2005.06.044
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 dispersion of the lowest lying singlet electron-hole excitation of pentacene along the reciprocal lattice vector (10 0) has been studied using electron energy-loss spectroscopy. This exciton shows a clear dispersion along the direction with a band width of about 100 meV. Moreover, the translational symmetry indicated by the exciton band structure does not agree with that reported from diffraction studies. This might be related to the interaction responsible for the dispersion which is of next nearest neighbor type only. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：92 / 98
页数：7
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