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Ultrafast Transient Optical Studies of Charge Pair Generation and Recombination in Poly-3-Hexylthiophene(P3ht):[6,6]Phenyl C61 Butyric Methyl Acid Ester (PCBM) Blend Films

Kirkpatrick, James; Keivanidis, Panagiotis E.; Bruno, Annalisa; Ma, Fei LU ; Haque, Saif A.; Yarstev, Arkady; Sundström, Villy LU and Nelson, Jenny (2011) In The Journal of Physical Chemistry Part B 115(51). p.15174-15180
Abstract
Charge generation and recombination are studied in blend films of poly-3-hexylthiophene (P3HT) and [6,6']phenyl C61 butyric acid methyl ester (PCBM) using ultrafast transient absorption spectroscopy. We find that the charge generation yield depends upon both blend film composition and thermal annealing. The data suggest that recombination occurs over a wide range of time scales and that, in the least favorable cases, the fastest charge recombination occurs on a time scale similar to exciton diffusion. The results are explained using a simple model that incorporates the effect of P3HT domain size on exciton diffusion and uses empirical models of recombination kinetics. We propose our method as a route to interpretation of spectroscopic data... (More)
Charge generation and recombination are studied in blend films of poly-3-hexylthiophene (P3HT) and [6,6']phenyl C61 butyric acid methyl ester (PCBM) using ultrafast transient absorption spectroscopy. We find that the charge generation yield depends upon both blend film composition and thermal annealing. The data suggest that recombination occurs over a wide range of time scales and that, in the least favorable cases, the fastest charge recombination occurs on a time scale similar to exciton diffusion. The results are explained using a simple model that incorporates the effect of P3HT domain size on exciton diffusion and uses empirical models of recombination kinetics. We propose our method as a route to interpretation of spectroscopic data where different processes occur on similar time scales. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
The Journal of Physical Chemistry Part B
volume
115
issue
51
pages
15174 - 15180
publisher
The American Chemical Society
external identifiers
  • wos:000298214700004
  • scopus:84255204942
ISSN
1520-5207
DOI
10.1021/jp205731f
language
English
LU publication?
yes
id
e17f58d0-f590-4638-a8bd-11dd1ca10b64 (old id 2316180)
date added to LUP
2012-02-07 09:52:59
date last changed
2017-08-27 04:43:25
@article{e17f58d0-f590-4638-a8bd-11dd1ca10b64,
  abstract     = {Charge generation and recombination are studied in blend films of poly-3-hexylthiophene (P3HT) and [6,6']phenyl C61 butyric acid methyl ester (PCBM) using ultrafast transient absorption spectroscopy. We find that the charge generation yield depends upon both blend film composition and thermal annealing. The data suggest that recombination occurs over a wide range of time scales and that, in the least favorable cases, the fastest charge recombination occurs on a time scale similar to exciton diffusion. The results are explained using a simple model that incorporates the effect of P3HT domain size on exciton diffusion and uses empirical models of recombination kinetics. We propose our method as a route to interpretation of spectroscopic data where different processes occur on similar time scales.},
  author       = {Kirkpatrick, James and Keivanidis, Panagiotis E. and Bruno, Annalisa and Ma, Fei and Haque, Saif A. and Yarstev, Arkady and Sundström, Villy and Nelson, Jenny},
  issn         = {1520-5207},
  language     = {eng},
  number       = {51},
  pages        = {15174--15180},
  publisher    = {The American Chemical Society},
  series       = {The Journal of Physical Chemistry Part B},
  title        = {Ultrafast Transient Optical Studies of Charge Pair Generation and Recombination in Poly-3-Hexylthiophene(P3ht):[6,6]Phenyl C61 Butyric Methyl Acid Ester (PCBM) Blend Films},
  url          = {http://dx.doi.org/10.1021/jp205731f},
  volume       = {115},
  year         = {2011},
}