In organic bulk heterojunction solar cells, the nanoscale morphology of interpenetrating donor-acceptor materials and the resulting photovoltaic parameters alter as a consequence of prolonged operation at temperatures above the glass transition temperature. Thermal annealing induces clustering of the acceptor material and a corresponding decrease in the short circuit current. A model based on the kinetics of Ostwald ripening is proposed to describe the thermally accelerated degradation of the short circuit current of solar cells with poly(2-methoxy-5-(,-dimethyloctyloxy)-1,4-phenylenevinylene) (MDMO-PPV) as donor and (6,6)-phenyl -butyric acid methyl ester (PCBM) as acceptor. The activation energy for the degradation is determined by an Arrhenius model, allowing to perform shelf life prediction.
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19 April 2010
Research Article|
April 20 2010
Modeling the temperature induced degradation kinetics of the short circuit current in organic bulk heterojunction solar cells
Bert Conings;
Bert Conings
a)
1IMEC-IMOMEC, vzw, Institute for Materials Research,
Hasselt University
, 3590 Diepenbeek, Belgium
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Sabine Bertho;
Sabine Bertho
1IMEC-IMOMEC, vzw, Institute for Materials Research,
Hasselt University
, 3590 Diepenbeek, Belgium
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Koen Vandewal;
Koen Vandewal
1IMEC-IMOMEC, vzw, Institute for Materials Research,
Hasselt University
, 3590 Diepenbeek, Belgium
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Alessia Senes;
Alessia Senes
2
Konarka Austria GmbH
, 4040 Linz, Austria
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Jan D’Haen;
Jan D’Haen
1IMEC-IMOMEC, vzw, Institute for Materials Research,
Hasselt University
, 3590 Diepenbeek, Belgium
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Jean Manca;
Jean Manca
1IMEC-IMOMEC, vzw, Institute for Materials Research,
Hasselt University
, 3590 Diepenbeek, Belgium
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René A. J. Janssen
René A. J. Janssen
3Molecular Materials and Nanosystems,
Eindhoven University of Technology
, 5600 MB Eindhoven, The Netherlands
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a)
Electronic mail: [email protected].
Appl. Phys. Lett. 96, 163301 (2010)
Article history
Received:
February 10 2010
Accepted:
March 24 2010
Citation
Bert Conings, Sabine Bertho, Koen Vandewal, Alessia Senes, Jan D’Haen, Jean Manca, René A. J. Janssen; Modeling the temperature induced degradation kinetics of the short circuit current in organic bulk heterojunction solar cells. Appl. Phys. Lett. 19 April 2010; 96 (16): 163301. https://doi.org/10.1063/1.3391669
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