Polarized superradiance from delocalized exciton transitions in tetracene single crystals

Abstract

Polarized superradiant emission and exciton delocalization in tetracene single crystals are reported. Polarization-, time-, and temperature-resolved spectroscopy evidence the complete polarization of the zero-phonon line of the intrinsic tetracene emission from both the lower (F state) and the upper (thermally activated) Davydov excitons. The superradiance of the F emission is substantiated by a nearly linear decrease of the radiative lifetime with temperature, being fifteen times shorter at 30 K compared to the isolated molecule, with an exciton delocalization of about 40 molecules.

14 pages, 4 figures

References in corpus (3)

• Morphology Effectively Controls Singlet-Triplet Exciton Relaxation and Charge Transport in Organic Semiconductors
• Phonons and structures of tetracene polymorphs at low temperature and high pressure
• Effect of shallow traps on polaron transport at the surface of organic semiconductors

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