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

页码：3632 / 3635

页数：4

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