Spectroscopic Study of Anisotropic Excitons in Single Crystal Hexacene.
نویسندگان
چکیده
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.
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ورودعنوان ژورنال:
- The journal of physical chemistry letters
دوره 5 21 شماره
صفحات -
تاریخ انتشار 2014