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Charge formation and transport in bulk-heterojunction solar cells based on alternating polyfluorene copolymers blended with fullerenes

Jespersen, Kim LU ; Zhang, FL ; Gadisa, A ; Sundström, Villy LU ; Yartsev, Arkady LU orcid and Inganas, O (2006) In Organic Electronics 7(4). p.235-242
Abstract
We investigate charge formation in bulk-heterojunction solar cells based on conjugated polymers in the form of alternating polyfluorene copolymers and the methanofullerene PCBM. Using transient absorption spectroscopy we show that optimal charge formation is obtained with 20-50 wt% PCBM. This is in contrast to the maximum short circuit current density obtained at similar to 80 wt% PCBM as determined by steady state current density-voltage characterization. Hence, we show explicitly that the solar cell performance of these interpenetrating polymer networks containing PCBM is limited by charge transport rather than by formation of charges. (c) 2006 Elsevier B.V. All rights reserved.
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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
bulk-heterojunction solar cells, transient absorption spectroscopy, charge transport
in
Organic Electronics
volume
7
issue
4
pages
235 - 242
publisher
Elsevier
external identifiers
  • wos:000238295300008
  • scopus:33646679641
ISSN
1566-1199
DOI
10.1016/j.orgel.2006.03.001
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
1712752d-373e-4205-bb93-c2a209bb5d27 (old id 405882)
date added to LUP
2016-04-01 12:29:31
date last changed
2021-07-06 04:06:56
@article{1712752d-373e-4205-bb93-c2a209bb5d27,
  abstract     = {We investigate charge formation in bulk-heterojunction solar cells based on conjugated polymers in the form of alternating polyfluorene copolymers and the methanofullerene PCBM. Using transient absorption spectroscopy we show that optimal charge formation is obtained with 20-50 wt% PCBM. This is in contrast to the maximum short circuit current density obtained at similar to 80 wt% PCBM as determined by steady state current density-voltage characterization. Hence, we show explicitly that the solar cell performance of these interpenetrating polymer networks containing PCBM is limited by charge transport rather than by formation of charges. (c) 2006 Elsevier B.V. All rights reserved.},
  author       = {Jespersen, Kim and Zhang, FL and Gadisa, A and Sundström, Villy and Yartsev, Arkady and Inganas, O},
  issn         = {1566-1199},
  language     = {eng},
  number       = {4},
  pages        = {235--242},
  publisher    = {Elsevier},
  series       = {Organic Electronics},
  title        = {Charge formation and transport in bulk-heterojunction solar cells based on alternating polyfluorene copolymers blended with fullerenes},
  url          = {http://dx.doi.org/10.1016/j.orgel.2006.03.001},
  doi          = {10.1016/j.orgel.2006.03.001},
  volume       = {7},
  year         = {2006},
}