Transient Spectroscopy of Frenkel and Charge Transfer Excitons in-Sexithienyl Films
- 20 October 1997
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 79 (16) , 3066-3069
- https://doi.org/10.1103/physrevlett.79.3066
Abstract
Photoexcitations dynamics are investigated in α-sexithienyl nanocrystalline films using transient photomodulation in a spectral range from 0.4 to 2.5 eV and time domain from 200 fs to 50 ms. We identify intrachain and interchain excitations. The former are even parity excitons with ultrafast dynamics, whereas the latter are long-lived charge transfer excitons generated within 300 fs, which separate into uncorrelated polaron pairs in the submicrosecond time domain.Keywords
This publication has 22 references indexed in Scilit:
- The electronic structure of solid α‐sexithiopheneAdvanced Materials, 1996
- Visible and near-infrared ultrafast optical dynamics of hexamethylsexithiophene in solutionPhysical Review B, 1996
- Field‐effect transistor made with a sexithiophene single crystalAdvanced Materials, 1996
- Growth of conjugated oligomer thin films studied by atomic-force microscopyPhysical Review B, 1995
- Exciton Coupling Effects in the Absorption and Photoluminescence of Sexithiophene DerivativesThe Journal of Physical Chemistry, 1995
- Organic Transistors: Two-Dimensional Transport and Improved Electrical CharacteristicsScience, 1995
- Photoinduced charge transfer in poly(p-phenylene vinylene)Physical Review B, 1994
- Organic Molecular Beam Deposition of α-SexithienylJapanese Journal of Applied Physics, 1994
- Marvels of molecular deviceNature, 1993
- Location of the low-energystate in a polythiophene oligomer by two-photon absorption spectroscopy: α-sexithienylPhysical Review Letters, 1992