TITLE

Modeling the temperature induced degradation kinetics of the short circuit current in organic bulk heterojunction solar cells

AUTHOR(S)
Conings, Bert; Bertho, Sabine; Vandewal, Koen; Senes, Alessia; D’Haen, Jan; Manca, Jean; Janssen, René A. J.
PUB. DATE
April 2010
SOURCE
Applied Physics Letters;4/19/2010, Vol. 96 Issue 16, p163301
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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-(3′,7′-dimethyloctyloxy)-1,4-phenylenevinylene) (MDMO-PPV) as donor and (6,6)-phenyl C61-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.
ACCESSION #
49807530

 

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