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Geminate charge recombination in alternating polyfluorene Copolymer/Fullerene blends

De, Swati LU ; Pascher, Torbjörn LU ; Maiti, Manisankar LU ; Jespersen, Kim LU ; Kesti, Tero LU ; Zhang, Fengling ; Inganas, Olle ; Yartsev, Arkady LU and Sundström, Villy LU (2007) In Journal of the American Chemical Society 129(27). p.8466-8472
Abstract
By measuring excited state and charge dynamics in blends of an alternating polyfluorene copolymer and fullerene derivative over nine orders in time and two orders in light intensity, we have monitored the light-induced processes from ultrafast charge photogeneration to much slower decay of charges by recombination. We find that at low light intensities relevant to solar cell operation relatively fast (similar to 30 ns) geminate recombination is the dominating charge decay process, while nongeminate recombination has a negligible contribution. The conclusion of our work is that under solar illumination conditions geminate recombination of charges may be directly competing with efficient charge collection in polymer/fullerene solar cells.
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of the American Chemical Society
volume
129
issue
27
pages
8466 - 8472
publisher
The American Chemical Society (ACS)
external identifiers
  • wos:000247759400024
  • scopus:34447509735
ISSN
1520-5126
DOI
10.1021/ja068909q
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
1d321ae5-8df7-47d9-8812-08396e4b565b (old id 646319)
date added to LUP
2016-04-01 16:46:20
date last changed
2020-12-15 01:39:03
@article{1d321ae5-8df7-47d9-8812-08396e4b565b,
  abstract     = {By measuring excited state and charge dynamics in blends of an alternating polyfluorene copolymer and fullerene derivative over nine orders in time and two orders in light intensity, we have monitored the light-induced processes from ultrafast charge photogeneration to much slower decay of charges by recombination. We find that at low light intensities relevant to solar cell operation relatively fast (similar to 30 ns) geminate recombination is the dominating charge decay process, while nongeminate recombination has a negligible contribution. The conclusion of our work is that under solar illumination conditions geminate recombination of charges may be directly competing with efficient charge collection in polymer/fullerene solar cells.},
  author       = {De, Swati and Pascher, Torbjörn and Maiti, Manisankar and Jespersen, Kim and Kesti, Tero and Zhang, Fengling and Inganas, Olle and Yartsev, Arkady and Sundström, Villy},
  issn         = {1520-5126},
  language     = {eng},
  number       = {27},
  pages        = {8466--8472},
  publisher    = {The American Chemical Society (ACS)},
  series       = {Journal of the American Chemical Society},
  title        = {Geminate charge recombination in alternating polyfluorene Copolymer/Fullerene blends},
  url          = {http://dx.doi.org/10.1021/ja068909q},
  doi          = {10.1021/ja068909q},
  volume       = {129},
  year         = {2007},
}