Davydov splitting and band structure for triplet excitons in pyrene

S. Arnold, W. B. Whitten, A. C. Damask

Research output: Contribution to journalArticle

Abstract

The first peak (0-0 transition) of the singlet-triplet delayed fluorescence excitation spectrum in pyrene has been investigated in polarized light. The b-polarized transition is found to be at higher energy than the a-polarized transition by a Davydov splitting of 2.4 ± 0.6 cm-1. An expression for the energy bands ε(k→) is derived and related to the Davydov splitting. Transport properties of the triplet excitons have been evaluated and indicate that the diffusion of triplet excitons in pyrene is due more to a hopping process than to coherent band motion.

Original languageEnglish (US)
Pages (from-to)3452-3457
Number of pages6
JournalPhysical Review B
Volume3
Issue number10
DOIs
StatePublished - Jan 1 1971

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ASJC Scopus subject areas

  • Condensed Matter Physics

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