Singlet-triplet splitting of geminate electron-hole pairs in conjugated polymers

A. Kadashchuk*, A. Vakhnin, I. Blonski, D. Beljonne, Z. Shuai, Jean-Luc Bredas, V. I. Arkhipov, P. Heremans, E. V. Emelianova, H. Bässler

*Corresponding author for this work

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Abstract

The thermally stimulated luminescence technique was used for investigating the singlet-triplet splitting of geminate polaron pairs in a ladder-type conjugated polymer. The energy gap that separated the single and triplet states of geminate pairs depended on the polymer morphology and was measured to be in the range of 3-6 meV. THe singlet-triplet branching was strongly impacted by the sample morphology. The low splitting values obtained from quantum-chemical calculations were found to be important for the spin-dependent exciton formation in conjugated polymers.

Original languageEnglish (US)
Article number066803
JournalPhysical Review Letters
Volume93
Issue number6
DOIs
StatePublished - Aug 6 2004

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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