Field-assisted femtosecond pump probe measurements on conjugated systems

Authors
Zenz, C Graupner, W Cerullo, G Lanzani, G Nisoli, M List, EJW Meghdadi, F Leising, G De Silvestri, S
Citation
C. Zenz et al., Field-assisted femtosecond pump probe measurements on conjugated systems, OPT MATER, 12(2-3), 1999, pp. 273-277
Citations number
17
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
OPTICAL MATERIALS
ISSN journal
09253467 → ACNP
Volume
12
Issue
2-3
Year of publication
1999
Pages
273 - 277
Database
ISI
SICI code
0925-3467(199906)12:2-3<273:FFPPMO>2.0.ZU;2-L
Abstract
The exciton dissociation in presence of an electric field is investigated i n light emitting diodes of ladder-type poly(para-phenylene). The experiment al setup allows us to directly observe the dynamics of the dissociation pro cess with femtosecond-time resolution. Charge carriers are generated by two separate mechanisms. For early times, we observe an intra-chain dissociati on corresponding to breaking during spectral relaxation. For longer times, we observe a time independent dissociation mechanism due to on-chain dissoc iation. (C) 1999 Elsevier Science B.V. All rights reserved.