Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/7844
Title: NMR study of the nanomorphology in thin films of polymer blends used in organic PV devices: MDMO-PPV/PCBM
Authors: MENS, Raoul 
ADRIAENSENS, Peter 
LUTSEN, Laurence 
SWINNEN, Ann 
BERTHO, Sabine 
RUTTENS, Bart 
D'HAEN, Jan 
MANCA, Jean 
CLEIJ, Thomas 
VANDERZANDE, Dirk 
GELAN, Jan 
Issue Date: 2008
Publisher: JOHN WILEY & SONS INC
Source: JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 46(1). p. 138-145
Abstract: The disclosure of the nanomorphology of thin films in organic solar cells, prepared from blends of conjugated polymers and PCBM, is of key importance for a better understanding of the occurring photovoltaic (PV) mechanisms. Hereto solid-state NMR relaxometry has been evaluated as a complementary technique to traditional microscopic techniques like atomic force microscopy and transmission electron microscopy. It is demonstrated that proton wide-line solid-state NMR relaxometry is a useful and innovative tool to study the phase morphology of blends used in semiconducting polymer based PV devices. Attention is focused on the influence of the blend composition and casting conditions on the resulting phase morphology. Two different casting techniques, i.e. spincoating and Doctor Blading, were compared. To demonstrate the applicability of NMR relaxometry in this field, MDMO-PPV/PCBM blends where used, since these are known for their significant phase separation behavior in combination with toluene as solvent. In films prepared from blends in toluene with a PCBM content >= 70 wt %, a fraction of the PCBM is phase separated into crystalline domains, whereas the remaining part remains homogeneously mixed with the MDMO-PPV. (c) 2007 Wiley Periodicals, Inc.
Notes: Hasselt Univ, Mat Res Inst, B-3590 Diepenbeek, Belgium. IMEC VZW, B-3001 Heverlee, Belgium.Adriaensens, P, Hasselt Univ, Mat Res Inst, B-3590 Diepenbeek, Belgium.peter.adriaensens@uhasselt.be jan.gelan@uhasselt.be
Keywords: conducting polymers; conjugated polymer blends; microscopy; organic solar cells; phase morphology; phase separation; solid-state NMR; thin films
Document URI: http://hdl.handle.net/1942/7844
ISSN: 0887-624X
e-ISSN: 1099-0518
DOI: 10.1002/pola.22365
ISI #: 000251980900015
Category: A1
Type: Journal Contribution
Validations: ecoom 2009
Appears in Collections:Research publications

Show full item record

SCOPUSTM   
Citations

47
checked on Sep 3, 2020

WEB OF SCIENCETM
Citations

49
checked on May 21, 2022

Page view(s)

56
checked on May 20, 2022

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.