Spectroscopic investigation of the different long-lived photoexcitations in a polythiophene
- 30 May 2002
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 116 (23) , 10503-10507
- https://doi.org/10.1063/1.1478768
Abstract
Using time-resolved photoinduced transient absorption and gated emission techniques long-lived excitations of the solid-state conjugated polymer poly(3-methyl-4-octyl-thiophene) (PMOT) have been detected and analyzed at different temperatures. At 15 K phosphorescence and delayed fluorescence resulting from triplet and geminate pair decay, respectively, are observed. A redshifted emission (with respect to the prompt fluorescence) detected at ambient temperatures is assigned to excimer fluorescence. We also observed excitations with extremely long lifetimes of 300 ms at 289 K that we allocate to triplet excimer formation.Keywords
This publication has 18 references indexed in Scilit:
- Linewidths in energy-resolved two-photon photoemission spectroscopyPhysical Review B, 2002
- Dynamics and trap-depth distribution of triplet excited states in thin films of the light-emitting polymer poly(9,9-di(ethylhexyl)fluorene)Physical Review B, 2002
- S 1 ∼>T 1 intersystem crossing in π-conjugated organic polymersThe Journal of Chemical Physics, 2001
- Triplet Energies of-Conjugated PolymersPhysical Review Letters, 2001
- Phosphorescence of-Conjugated Oligomers and PolymersPhysical Review Letters, 2000
- Electro-optical studies of a soluble conjugated polymer with particularly low intrachain disorderPhysical Review B, 1999
- Photophysics of Substituted PolythiophenesThe Journal of Physical Chemistry B, 1999
- Electroluminescence from Substituted Poly(thiophenes): From Blue to Near-InfraredMacromolecules, 1995
- Excimers and Exciplexes of Conjugated PolymersScience, 1994
- Formation and decay of triplet excimers as revealed by their absorption spectra: Intramolecular excimers of α,α-dinaphthylalkanesChemical Physics Letters, 1978