Spectroscopic Study of Anisotropic Excitons in Single Crystal Hexacene

被引：10
作者：
Chernikov, Alexey [1 ,2 ]
Yaffe, Omer [1 ,2 ]
Kumar, Bharat [3 ]
Zhong, Yu [3 ]
Nuckolls, Colin [3 ]
Heinz, Tony F. [1 ,2 ]
机构：
[1] Columbia Univ, Dept Phys, New York, NY 10027 USA
[2] Columbia Univ, Dept Elect Engn, New York, NY 10027 USA
[3] Columbia Univ, Dept Chem, New York, NY 10027 USA
来源：
JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2014年 / 5卷 / 21期
关键词：
ORGANIC SEMICONDUCTORS; CHARGE-TRANSPORT; FISSION; PENTACENE; TRANSITIONS; ELECTRONICS; ANTHRACENE; SPECTRA;
D O I：
10.1021/jz501693g
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 linear optical response of hexacene single crystals over a spectral range of 1.3-1.9 eV was studied using polarization-resolved reflectance spectroscopy at cryogenic temperatures. We observe strong polarization anisotropy for all optical transitions. Pronounced deviations from the single-molecule, solution-phase spectra are present, with a measured Davydov splitting of 180 meV, indicating strong intermolecular coupling. The energies and oscillator strengths of the relevant optical transitions and polarization-dependent absorption coefficients are extracted from quantitative analysis of the data. [GRAPHICS]
引用
收藏
页码：3632 / 3635
页数：4
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