[en] Two donor–acceptor type fluoro-isoindigo based small molecule semiconductors are syn- thesized and their optical, electrochemical, thermal, and charge transport properties are investigated. The two molecular chromophores differ by their architecture, linear (M1) vs propeller-like (M2). Both molecules present a broad absorption in the visible range and a low optical HOMO–LUMO gap (?1.6 eV). AFM images of solution-processed thin films show that the trigonal molecule M2 forms highly oriented fibrils after a few seconds of solvent vapor annealing. The materials are evaluated as electron donor components in bulk heterojunction organic solar cells using PC61BM as the electron acceptor. The devices based on the propeller-like molecule M2 exhibit a high open-circuit voltage (around 1.0 V) and a power conversion efficiency of 2.23%.
Research center :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Materials science & engineering Chemistry
Author, co-author :
Ouhib, Farid ; University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Tomassetti, Mirco ; University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Dierckx, Wauter; Hasselt University, Organic and Nanostructured Electronics & Energy Conversion (ONE2), Institute for Materials Research (IMO-IMOMEC) > IMOMEC Division, IMEC, Wetenschapspark Diepenbeek, Belgium
Verstappen, Pieter; Hasselt University, Design & Synthesis of Organic Semiconductors (DSOS), Institute for Materials Research (IMO-IMOMEC) > IMOMEC Division, IMEC, Wetenschapspark Diepenbeek, Belgium
Wislez, Arnaud ; Université de Liège - ULiège, Department of Chemistry, Nanochemistry and Molecular Systems (NANOCHEM)
Duwez, Anne-Sophie ; Université de Liège - ULiège, Department of Chemistry, Nanochemistry and Molecular Systems (NANOCHEM)
Lemaur, Vincent; University of Mons (UMons), Laboratory for Chemistry of Novel Materials
Lazzaroni, Roberto; University of Mons (UMons), Laboratory for Chemistry of Novel Materials
Manca, Jean; Hasselt University, Organic and Nanostructured Electronics & Energy Conversion (ONE2), Institute for Materials Research (IMO-IMOMEC) > IMOMEC Division, IMEC, Wetenschapspark Diepenbeek, Belgium
Maes, Wouter; Hasselt University, Design & Synthesis of Organic Semiconductors (DSOS), Institute for Materials Research (IMO-IMOMEC) > IMOMEC Division, IMEC, Wetenschapspark Diepenbeek, Belgium
Jérôme, Christine ; University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Detrembleur, Christophe ; University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Language :
English
Title :
Linear and propeller-like fluoro-isoindigo based donor–acceptor small molecules for organic solar cells
Publication date :
May 2015
Journal title :
Organic Electronics
ISSN :
1566-1199
Publisher :
Elsevier Science
Volume :
20
Pages :
76-88
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
FEDER Smartfilm RF project INTERREG program ORGANEXT
Funders :
EC - European Commission [BE] BELSPO - Politique scientifique fédérale [BE] Walloon region [BE] F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE] IWT - Agency for Innovation by Science and Technology [BE]
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