Charge-Transfer Excitons in Strongly Coupled Organic Semiconductors

[en] Time-resolved and temperature-dependent photoluminescence measurements on one-dimensional sexithiophene lattices reveal intrinsic branching of photoexcitations to two distinct species: self-trapped excitons and dark charge-transfer excitons (CTXs; ?5% yield), with radii spanning 2-3 sites. The significant charge-transfer exciton (CTX) yield results from the strong charge-transfer character of the Frenkel exciton band due to the large free-exciton bandwidth (˜400meV) in these supramolecular nanostructures.

Disciplines :

Physics

Author, co-author :

Glowe, J.F.

Perrin, M.

Beljonne, David ; Université de Mons > Faculté des Sciences > Service de Chimie des matériaux nouveaux

Hayes, S.C.

Gardebien, F.

Silva, C.

Language :

English

Title :

Charge-Transfer Excitons in Strongly Coupled Organic Semiconductors

Publication date :

05 January 2010

Journal title :

Physical Review. B, Condensed Matter

ISSN :

0163-1829

Publisher :

American Physical Society, Moldova

Volume :

Issue :

Pages :

041201

Peer reviewed :

Peer Reviewed verified by ORBi

Research unit :

S817 - Chimie des matériaux nouveaux

Research institute :

R400 - Institut de Recherche en Science et Ingénierie des Matériaux

Available on ORBi UMONS :

since 10 June 2010

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