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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/1590

Title: Tuning the dimensions of C-60-based needlelike crystals in blended thin films
Authors: SWINNEN, Ann
HAELDERMANS, Ilse
VAN DE VEN, Martin
D'HAEN, Jan
VANHOYLAND, Geert
ARESU, Stefano
D'OLIESLAEGER, Marc
MANCA, Jean
Issue Date: 2006
Publisher: Wiley
Citation: ADVANCED FUNCTIONAL MATERIALS, 16(6). p. 760-765
Abstract: A new ordered structure of the C60 derivative PCBM ([6-6]-phenyl C61-butyric acid methyl ester) is obtained in thin films based on the blend PCBM:regioregular P3HT (poly(3-hexylthiophene)). Rapid formation of needlelike crystalline PCBM structures of a few micrometers up to 100 m in size is demonstrated by submitting the blended thin films to an appropriate thermal treatment. These structures can grow out to a 2D network of PCBM needles and, in specific cases, to spectacular PCBM fans. Key parameters to tune the dimensions and spatial distribution of the PCBM needles are blend ratio and annealing conditions. The as-obtained blended films and crystals are probed using atomic force microscopy, transmission electron microscopy, selected area electron diffraction, optical microscopy, and confocal fluorescence microscopy. Based on the analytical results, the growth mechanism of the PCBM structures within the film is described in terms of diffusion of PCBM towards the PCBM crystals, leaving highly crystalline P3HT behind in the surrounding matrix.
URI: http://hdl.handle.net/1942/1590
DOI: 10.1002/adfm.200500812
ISI #: 000236812400004
ISSN: 1616-301X
Category: A1
Type: Journal Contribution
Validation: ecoom, 2007
Appears in Collections: Institute for Materials Research
Institute for Materials Research in MicroElectronics - Archive
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