Long-Range Excitons in Optical Absorption Spectra of Electroluminescent Polymer Poly(para-phenylenevinylene)

Abstract

The component of photoexcited states with large spatial extent is investigated for poly(para-phenylenevinylene) using the intermediate exciton theory. We find a peak due to long-range excitons at the higher-energy side of the lowest main feature of optical spectra. The fact that the onset of long-range excitons is located near the energy gap is related to the mechanisms of large photocurrents measured in such energy regions. We show that a large value of the hopping integral is realistic for characterizing optical excitations.

To be published in J. Phys. Soc. Jpn. (Letters)

References in corpus (2)

• Optical absorption spectra in fullerenes C60 and C70: Effects of Coulomb interactions, lattice fluctuations, and anisotropy
• Charge transfer excitons in optical absorption spectra of C60-dimers and polymers

Cited by in corpus (4)

• Long-range excitons in conjugated polymers with ring torsions
• Long-range excitons in conjugated polymers with ring torsions: poly(para-phenylene) and polyaniline
• Optical excitations in electroluminescent polymers: poly(para-phenylenevinylene) family
• Electronic Properties of Topological Materials: Optical Excitations in Moebius Conjugated Polymers