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Dynamics of charge pair generation in ladder-type poly(para-phenylene) at different excitation photon energies

Gulbinas, V; Zausjitsyn, Yuri LU ; Bassler, H; Yartsev, Arkady LU and Sundström, Villy LU (2004) In Physical Review B (Condensed Matter and Materials Physics) 70(3). p.1-035215
Abstract
Generation of charge pairs in a ladder-type poly(para-phenylene) was investigated by means of electric field modulated femtosecond pump-probe absorption spectroscopy upon excitation at 3.1 and 4.66 eV. Exciting at 3.1 eV in the optical S-0-->S-1 transition, the number of geminately bound electron-hole pairs rises smoothly within the entire exciton life time. Upon excitation at 4.66 eV an instantaneous generation of geminate pairs superimposed on the more gradual increase is observed. Both processes are field-assisted, albeit differently. The former is attributed to ultrafast dissociation of a hot Franck-Condon state, while the latter is assigned to dissociation of vibrationally relaxed singlet excitons.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B (Condensed Matter and Materials Physics)
volume
70
issue
3
pages
1 - 035215
publisher
American Physical Society
external identifiers
  • wos:000222996700062
  • scopus:42749098182
ISSN
1098-0121
DOI
10.1103/PhysRevB.70.035215
language
English
LU publication?
yes
id
0dcd8417-9805-48d4-b0e8-c6bf1ee8be3b (old id 138975)
date added to LUP
2007-07-03 11:42:39
date last changed
2017-10-08 04:12:58
@article{0dcd8417-9805-48d4-b0e8-c6bf1ee8be3b,
  abstract     = {Generation of charge pairs in a ladder-type poly(para-phenylene) was investigated by means of electric field modulated femtosecond pump-probe absorption spectroscopy upon excitation at 3.1 and 4.66 eV. Exciting at 3.1 eV in the optical S-0-->S-1 transition, the number of geminately bound electron-hole pairs rises smoothly within the entire exciton life time. Upon excitation at 4.66 eV an instantaneous generation of geminate pairs superimposed on the more gradual increase is observed. Both processes are field-assisted, albeit differently. The former is attributed to ultrafast dissociation of a hot Franck-Condon state, while the latter is assigned to dissociation of vibrationally relaxed singlet excitons.},
  author       = {Gulbinas, V and Zausjitsyn, Yuri and Bassler, H and Yartsev, Arkady and Sundström, Villy},
  issn         = {1098-0121},
  language     = {eng},
  number       = {3},
  pages        = {1--035215},
  publisher    = {American Physical Society},
  series       = {Physical Review B (Condensed Matter and Materials Physics)},
  title        = {Dynamics of charge pair generation in ladder-type poly(para-phenylene) at different excitation photon energies},
  url          = {http://dx.doi.org/10.1103/PhysRevB.70.035215},
  volume       = {70},
  year         = {2004},
}