DOI: 10.1063/1.1415446. Triplet-triplet annihilation in a poly(fluorene)-derivative

Triplet-triplet annihilation in a poly(fluorene)-derivative

10.1063/1.1415446

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

We report on measurements of phosphorescence (Ph) and delayed fluorescence (DF) in poly(2,7-(9,9-bis(2-ethylhexyl)fluorene)) (PF2/6) present as dilute solid solution, as well as in bulk films. From combined experimental investigations of the time and intensity dependence of DF and Ph, as well as the temperature dependence of DF, we are able to show that DF in PF2/6, both in solution and film, is dominated by triplet-triplet annihilation (TTA). As a consequence of the intrachain diffusion and, hence, relaxation of triplets, the kinetics of the bimolecular reaction show a turnover from dispersive to nondispersive regime as borne out by the DF decay. This is in accord with theoretical predictions of TTA in disordered solids. From the transition to equilibrium kinetics, we are able to estimate the width of the density of states of triplets to 40 meV in good agreement with the width of the inhomogeneous broadenend S0←T1 transition of PF2/6.

Bibliography

Hertel, D., BÃ¤ssler, H., Guentner, R., & Scherf, U. (2001). Triplet-triplet annihilation in a poly(fluorene)-derivative. The Journal of Chemical Physics, 115(21), 10007â10013.

Authors 4

Dirk Hertel (first)
Heinz Bässler (additional)
Roland Guentner (additional)
Ullrich Scherf (additional)

References 16 Referenced 123

{'key': '2024021015350252700_r1'}
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{'key': '2024021015350252700_r14', 'first-page': '175', 'volume': '15', 'year': '1993', 'journal-title': 'Phys. Stat. Sol. (B)'} / Phys. Stat. Sol. (B) (1993)
10.1103/PhysRevB.63.094202 / Phys. Rev. B (2001)
{'key': '2024021015350252700_r16'}

Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 8:01 a.m.)
Deposited	1 year, 6 months ago (Feb. 10, 2024, 11:39 a.m.)
Indexed	1 month ago (Aug. 2, 2025, 12:03 a.m.)
Issued	23 years, 9 months ago (Dec. 1, 2001)
Published	23 years, 9 months ago (Dec. 1, 2001)
Published Print	23 years, 9 months ago (Dec. 1, 2001)

Funders 0

None

BibTeX

@article{Hertel_2001, title={Triplet-triplet annihilation in a poly(fluorene)-derivative}, volume={115}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1415446}, DOI={10.1063/1.1415446}, number={21}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Hertel, Dirk and Bässler, Heinz and Guentner, Roland and Scherf, Ullrich}, year={2001}, month=dec, pages={10007–10013} }

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