Ultrafast photoexcitation dynamics in a ladder-type oligophenyl

C. Gadermaier; G. Cerullo; M. Zavelani-Rossi; G. Sansone; G. Lanzani; E. Zojer; A. Pogantsch; D. Beljonne; Z. Shuai; J. L. Brédas; U. Scherf; G. Leising

doi:10.1103/PhysRevB.66.125203

Ultrafast photoexcitation dynamics in a ladder-type oligophenyl

C. Gadermaier, G. Cerullo, M. Zavelani-Rossi, G. Sansone, G. Lanzani, E. Zojer, A. Pogantsch, D. Beljonne, Z. Shuai, J. L. Brédas, U. Scherf, and G. Leising

Phys. Rev. B 66, 125203 – Published 11 September 2002

Abstract

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.

Received 4 February 2002

DOI:https://doi.org/10.1103/PhysRevB.66.125203

Authors & Affiliations

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