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Phys. Rev. B 66, 125203 (2002) [7 pages]

Ultrafast photoexcitation dynamics in a ladder-type oligophenyl

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C. Gadermaier*, G. Cerullo, M. Zavelani-Rossi, G. Sansone, and G. Lanzani
Dipartimento di Fisica, Politecnico di Milano, P.zza Leonardo da Vinci 32, 20133 Milano, Italy

E. Zojer and A. Pogantsch
Inst. f. Festkörperphysik, Technische Universität Graz, Petersgasse 16, 8010 Graz, Austria

D. Beljonne
Service de Chimie des Matériaux Nouveaux, Centre de Recherche en Electronique et Photonique Moléculaires, Université de Mons-Hainaut, Place du Parc 20, B 7000 Mons, Belgium

Z. Shuai
Center for Molecular Science, Institute of Chemistry, The Chinese Academy of Science, Beijing 100080, People’s Republic of China

J. L. Brédas
Department of Chemistry, The University of Arizona, Tucson, Arizona 85721-0041

U. Scherf
Institut f. Physikalische Chemie u. Theoretische Chemie, Universität Potsdam, Kârl-Liebknecht-Str. 24-25, D-14476 Golm, Germany

G. Leising
Science & Technology, AT&S AG, Fabriksgasse 13, 8700 Leoben, Austria

Received 4 February 2002; published 11 September 2002

Sub-ps transient differential transmission spectroscopy is used to study the photoexcitation dynamics of a blue emitting ladder-type oligophenyl in bulk film. The observed spectral features are ascribed to singlet excited states and polarons. The time traces of these features reveal the dynamics of charge-carrier generation from singlets via a migration-assisted dissociation mechanism.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.66.125203
DOI:
10.1103/PhysRevB.66.125203
PACS:
78.47.+p, 42.65.Re, 36.20.Kd, 31.25.Qm

*Corresponding author. Fax: +39-02-2399-6126; email address: gadermai@fubphpc.tu-graz.ac.at

 
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