Triplet-Exciton Generation Mechanism in a New Soluble (Red-Phase) Polydiacetylene
- 11 October 2001
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 87 (18) , 187402
- https://doi.org/10.1103/physrevlett.87.187402
Abstract
The time scale of covalent state relaxation and singlet fission into triplet pairs is determined in a solution of isolated polydiacetylene chains showing a remarkably sharp excitonic transition by applying the transient transmission difference spectroscopy technique with sub-10 fs optical pulses. Photoexcitation into the band of ionic states is followed by a branching within the first 100 fs which populates the band of covalent states. The latter start to dissociate into triplet excitations, completing the process in about 300 fs.Keywords
This publication has 26 references indexed in Scilit:
- Two-Photon Spectroscopy of π-Conjugated Polymers: The Case of Poly[1,6-bis(3,6-dihexadecyl-N-carbazolyl)-2,4-hexadiyne] (PolyDCHD-HS)The Journal of Physical Chemistry A, 2001
- Formation cross-sections of singlet and triplet excitons in π-conjugated polymersNature, 2001
- Solution spectroscopic properties of polyDCHD-HS: a novel highly soluble polydiacetyleneJournal of the Chemical Society, Perkin Transactions 2, 2000
- Singlet and Triplet Exciton Formation Rates in Conjugated Polymer Light-Emitting DiodesPhysical Review Letters, 2000
- Supramolecular organization in the solid state of a novel soluble polydiacetyleneLiquid Crystals, 1999
- Excitation Dynamics in Disubstituted PolyacetylenePhysical Review Letters, 1999
- Direct observation of the intersystem crossing in poly(3-octylthiophene)The Journal of Chemical Physics, 1995
- Solitons in conducting polymersReviews of Modern Physics, 1988
- Correlation effects and excited states in conjugated polymersPhysical Review B, 1986
- Observation of the Triplet Excited State of a Conjugated-Polymer CrystalPhysical Review Letters, 1986