Surface states in molecular chains with strong mixing of Frenkel and charge-transfer excitons

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Contributors

Abstract

We discuss the spectrum of excitons in quasi-one-dimensional crystals with strong orbital overlap between neighboring molecules. In such crystals, the energy difference between the lowest Frenkel exciton and charge-transfer exciton becomes small and their strong mixing determines the nature of the lowest energy states. We demonstrate here that in finite chains, simultaneously with excitonic `bulk' states also `surface' states can appear. The `surface' states are localized at the end of the chain and can be blue- or red-shifted in comparison with the `bulk' states. We discuss the contribution of these states to the absorption and fluorescence spectrum of molecular chains.

Details

Original languageEnglish
Pages (from-to)308-316
Number of pages9
JournalChemical Physics Letters
Volume325
Issue number1-3
Publication statusPublished - 2000
Peer-reviewedYes

External IDs

Scopus 0000664862

Keywords