Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/8330
Title: Effect of temperature on the morphological and photovoltaic stability of bulk heterojunction polymer: fullerene solar cells
Authors: BERTHO, Sabine 
Janssen, Griet
CLEIJ, Thomas 
CONINGS, Bert 
MOONS, Wouter 
GADISA DINKU, Abay
D'HAEN, Jan 
Goovaerts, E.
LUTSEN, Laurence 
MANCA, Jean 
VANDERZANDE, Dirk 
Issue Date: 2008
Publisher: ELSEVIER SCIENCE BV
Source: SOLAR ENERGY MATERIALS AND SOLAR CELLS, 92(7). p. 753-760
Abstract: In high performance polymer: fullerene bulk heterojunction solar cells the nanoscale morphology of interpenetrating acceptor:donor materials is optimized through appropriate preparation conditions such as annealing and choice of solvent, but this initial state-of-the-art morphology will not remain stable during long-term operation. We report the effects of prolonged storage at elevated temperatures on both the morphology and the photovoltaic performance for the model systems MDMO-PPV:PCBM and P3HT:PCBM as compared to 'High T-g PPV':PCBM based solar cells, where the 'High Tg PPV' is characterized by its high glass transition temperature (138 degrees Q. In situ monitoring of the photocurrent-voltage characteristics at elevated temperatures, in combination with a systematic transmission electron microscopy (TEM) study and complementary optical spectroscopy, reveals distinct degradation kinetics and morphological changes that indicate the occurrence of different underlying physico-chemical mechanisms. (c) 2008 Elsevier B.V. All rights reserved.
Notes: Hasselt Univ, Inst Mat Res, B-3590 Diepenbeek, Belgium. Univ Antwerp, Dept Phys, B-2610 Antwerp, Belgium. IMOMEC, IMEC VZW, B-3590 Diepenbeek, Belgium.
Keywords: organic photovoltaics; thermal stability; glass transition temperature; morphology
Document URI: http://hdl.handle.net/1942/8330
ISSN: 0927-0248
e-ISSN: 1879-3398
DOI: 10.1016/j.solmat.2008.01.006
ISI #: 000256121300008
Category: A1
Type: Journal Contribution
Validations: ecoom 2009
Appears in Collections:Research publications

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