Charge carrier photogeneration and recombination in ladder-type poly(para-phenylene): Interplay between impurities and external electric field
Gulbinas, V. ; Hertel, D. ; Yartsev, Arkady LU
and Sundström, Villy
LU
(2007)
In Physical Review B (Condensed Matter and Materials Physics)
76(23).
- Abstract
- Charge carrier generation and decay in m-LPPP polymer films were examined by means of femtosecond transient absorption spectroscopy in the time window of 100 fs-15 ns. Two modes of polaron formation with distinct behavior were identified, impurity induced in the absence of an external electric field and electric field induced in pristine film. While field induced charge generation is relatively slow, occurring throughout the excited state lifetime, the rate of impurity induced charge generation is much faster and depends on excitation wavelength; it occurs on the several hundred femtosecond time scale under excitation within the main absorption band, but excitation into the red wing of the absorption band results in charge generation... (More)
- Charge carrier generation and decay in m-LPPP polymer films were examined by means of femtosecond transient absorption spectroscopy in the time window of 100 fs-15 ns. Two modes of polaron formation with distinct behavior were identified, impurity induced in the absence of an external electric field and electric field induced in pristine film. While field induced charge generation is relatively slow, occurring throughout the excited state lifetime, the rate of impurity induced charge generation is much faster and depends on excitation wavelength; it occurs on the several hundred femtosecond time scale under excitation within the main absorption band, but excitation into the red wing of the absorption band results in charge generation within less than 100 fs. Polaron decay through geminate electron-hole recombination occurs with widely distributed lifetimes, from similar to 0.8 ns to microseconds; the polarons characterized by the shortest decay time have a redshifted absorption spectrum (as compared to more long-lived polarons) and are attributed to tightly bound polaron pairs. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1408345
- author
- Gulbinas, V.
; Hertel, D.
; Yartsev, Arkady
LU
and Sundström, Villy
LU
- organization
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B (Condensed Matter and Materials Physics)
- volume
- 76
- issue
- 23
- article number
- 235203
- publisher
- American Physical Society
- external identifiers
-
- wos:000251986500056
- scopus:36848998790
- ISSN
- 1098-0121
- DOI
- 10.1103/PhysRevB.76.235203
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)
- id
- ce9ceb30-cb4f-44ac-91cc-8fbdcd6e38c8 (old id 1408345)
- date added to LUP
- 2016-04-01 16:39:44
- date last changed
- 2022-01-28 21:12:20
@article{ce9ceb30-cb4f-44ac-91cc-8fbdcd6e38c8,
abstract = {{Charge carrier generation and decay in m-LPPP polymer films were examined by means of femtosecond transient absorption spectroscopy in the time window of 100 fs-15 ns. Two modes of polaron formation with distinct behavior were identified, impurity induced in the absence of an external electric field and electric field induced in pristine film. While field induced charge generation is relatively slow, occurring throughout the excited state lifetime, the rate of impurity induced charge generation is much faster and depends on excitation wavelength; it occurs on the several hundred femtosecond time scale under excitation within the main absorption band, but excitation into the red wing of the absorption band results in charge generation within less than 100 fs. Polaron decay through geminate electron-hole recombination occurs with widely distributed lifetimes, from similar to 0.8 ns to microseconds; the polarons characterized by the shortest decay time have a redshifted absorption spectrum (as compared to more long-lived polarons) and are attributed to tightly bound polaron pairs.}},
author = {{Gulbinas, V. and Hertel, D. and Yartsev, Arkady and Sundström, Villy}},
issn = {{1098-0121}},
language = {{eng}},
number = {{23}},
publisher = {{American Physical Society}},
series = {{Physical Review B (Condensed Matter and Materials Physics)}},
title = {{Charge carrier photogeneration and recombination in ladder-type poly(para-phenylene): Interplay between impurities and external electric field}},
url = {{http://dx.doi.org/10.1103/PhysRevB.76.235203}},
doi = {{10.1103/PhysRevB.76.235203}},
volume = {{76}},
year = {{2007}},
}