Exciton dynamics in alternating polyfluorene/fullerene blends
De, Swati LU ; Kesti, Tero LU ; Maiti, Manisankar LU ; Zhang, Fengling ; Inganas, Olle ; Yartsev, Arkady LU
; Pascher, Torbjörn
LU
and Sundström, Villy
LU
(2008)
In Chemical Physics
350(1-3).
p.14-22
- Abstract
- Exciton dynamics in alternating copolymer/fullerene solar cell blends have been investigated using femtosecond transient absorption spectroscopy. The acceptor concentrations have been varied over a wide range. Experimental data, kinetic modeling and simulations, all indicate that the efficiency of exciton conversion to charges is 100% even at acceptor concentrations as low as 20 wt%. The reported dependence of solar cell efficiency on fullerene concentration may thus arise from other factors. However, there exists an acceptor concentration threshold (5 wt%) below which a substantial fraction of the excitations remain unquenched. The results, we believe are very relevant to optimization of performance efficiency by clever manipulation of... (More)
- Exciton dynamics in alternating copolymer/fullerene solar cell blends have been investigated using femtosecond transient absorption spectroscopy. The acceptor concentrations have been varied over a wide range. Experimental data, kinetic modeling and simulations, all indicate that the efficiency of exciton conversion to charges is 100% even at acceptor concentrations as low as 20 wt%. The reported dependence of solar cell efficiency on fullerene concentration may thus arise from other factors. However, there exists an acceptor concentration threshold (5 wt%) below which a substantial fraction of the excitations remain unquenched. The results, we believe are very relevant to optimization of performance efficiency by clever manipulation of morphology. We have also observed exciton-exciton energy transfer in these blends at low acceptor concentrations. (C) 2007 Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1255123
- author
- De, Swati
LU
; Kesti, Tero
LU
; Maiti, Manisankar
LU
; Zhang, Fengling
; Inganas, Olle
; Yartsev, Arkady
LU
; Pascher, Torbjörn
LU
and Sundström, Villy
LU
- organization
- publishing date
- 2008
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- exciton dynamics, polyfluorene/fullerene blends
- in
- Chemical Physics
- volume
- 350
- issue
- 1-3
- pages
- 14 - 22
- publisher
- Elsevier
- external identifiers
-
- wos:000257539500004
- scopus:76249105699
- ISSN
- 0301-0104
- DOI
- 10.1016/j.chemphys.2007.11.018
- 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
- b0ce312a-cc7f-4ef1-90ff-e5e75e8f1ebf (old id 1255123)
- date added to LUP
- 2016-04-01 14:30:49
- date last changed
- 2022-01-28 00:57:32
@article{b0ce312a-cc7f-4ef1-90ff-e5e75e8f1ebf,
abstract = {{Exciton dynamics in alternating copolymer/fullerene solar cell blends have been investigated using femtosecond transient absorption spectroscopy. The acceptor concentrations have been varied over a wide range. Experimental data, kinetic modeling and simulations, all indicate that the efficiency of exciton conversion to charges is 100% even at acceptor concentrations as low as 20 wt%. The reported dependence of solar cell efficiency on fullerene concentration may thus arise from other factors. However, there exists an acceptor concentration threshold (5 wt%) below which a substantial fraction of the excitations remain unquenched. The results, we believe are very relevant to optimization of performance efficiency by clever manipulation of morphology. We have also observed exciton-exciton energy transfer in these blends at low acceptor concentrations. (C) 2007 Elsevier B.V. All rights reserved.}},
author = {{De, Swati and Kesti, Tero and Maiti, Manisankar and Zhang, Fengling and Inganas, Olle and Yartsev, Arkady and Pascher, Torbjörn and Sundström, Villy}},
issn = {{0301-0104}},
keywords = {{exciton dynamics; polyfluorene/fullerene blends}},
language = {{eng}},
number = {{1-3}},
pages = {{14--22}},
publisher = {{Elsevier}},
series = {{Chemical Physics}},
title = {{Exciton dynamics in alternating polyfluorene/fullerene blends}},
url = {{http://dx.doi.org/10.1016/j.chemphys.2007.11.018}},
doi = {{10.1016/j.chemphys.2007.11.018}},
volume = {{350}},
year = {{2008}},
}