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Polymer Bulletin

, Volume 76, Issue 12, pp 6429–6436 | Cite as

The contribution of triplet excitons to the total singlet production yield in a sky-blue emitting co-polymer film

  • Murat AydemirEmail author
Original Paper

Abstract

In this work, the complex excited state dynamics of a sky-blue emitting co-polymer {poly-[9,9′-dioctylfluorene-co-bis-N,N′-(4-butylphenyl)-bis-N,N′-phenyl-1,4-phenylenediamine]} is determined, using a time-resolved gated spectroscopy method, which helps to investigate the origin of delayed fluorescence in thin film. It is clearly shown that delayed fluorescence arises from triplet–triplet annihilation mechanism, which opens an indirect pathway to generate singlet excitons. Experimentally, the delayed fluorescence yield varies from 20% at room temperature to 46 ± 2% at 20 K, suggesting that an alternative triplet harvesting mechanism is operative to convert the triplet into emissive singlet states.

Notes

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

289_2019_2729_MOESM1_ESM.docx (32 kb)
Supplementary material 1 (DOCX 32 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Fundamental Sciences, Faculty of ScienceErzurum Technical UniversityErzurumTurkey

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