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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/4154

Title: High resolution electrical characterisation of organic photovoltaic blends
Authors: DOUHERET, Olivier
SWINNEN, Ann
BRESELGE, Martin
VAN SEVEREN, Ineke
LUTSEN, Laurence
VANDERZANDE, Dirk
MANCA, Jean
Issue Date: 2007
Publisher: ELSEVIER SCIENCE BV
Citation: MICROELECTRONIC ENGINEERING, 84(3). p. 431-436
Abstract: In this work, electrostatic force microscopy (EFM) and conductive atomic force microscopy (C-AFM) are applied to perform high-resolution electrical characterisation of organic photovoltaic films. These films are composed of the C-60-derivative PCBM blended with hole conductive conjugated polymers PPV derivatives or P3HT. It is demonstrated that both EFNI and C-AFM are able to electrically evidence phase separation in the blends, suggesting in addition higher density of carriers along interfaces. Correlation between the EFM contrast and the photovoltaic properties of the blends was observed. Local spectroscopy (I- V curves) completes the C-AFM investigations, analysing charge transport mechanisms in the P3HT:PCBM blend. Significant modifications of the local electrical properties of P3HT are shown to occur upon blending. Space charge limited current is evidenced in the blend and a hole mobility of 1.7 x 10(-2) cm(2) V-1 S-1 is determined for P3HT. (c) 2006 Elsevier BN. All rights reserved.
Notes: IMEC, Div IMOMEC, B-3590 Diepenbeek, Belgium. Hasselt Univ, Mat Res Inst, B-3590 Diepenbeek, Belgium.Douheret, O, IMEC, Div IMOMEC, Wetenschapspk 1, B-3590 Diepenbeek, Belgium.douheret@imec.be
URI: http://hdl.handle.net/1942/4154
DOI: 10.1016/j.mee.2006.10.056
ISI #: 000244903100008
ISSN: 0167-9317
Category: A1
Type: Journal Contribution
Validation: ecoom, 2008
Appears in Collections: Research publications

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