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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/18769

Title: Linear and propeller-like fluoro-isoindigo based donor-acceptor small molecules for organic solar cells
Authors: Ouhib, Farid
Wislez, Arnaud
Duwez, Anne-Sophie
Lemaur, Vincent
Lazzaroni, Roberto
MAES, Wouter
Jerome, Christine
Detrembleur, Christophe
Issue Date: 2015
Citation: ORGANIC ELECTRONICS, 20, p. 76-88
Abstract: Two donor-acceptor type fluoro-isoindigo based small molecule semiconductors are synthesized 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 (similar to 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%. (C) 2015 Elsevier B.V. All rights reserved.
Notes: Corresponding authors at: Design & Synthesis of Organic Semiconductors (DSOS), Institute for Materials Research (IMO-IMOMEC), Hasselt University, Agoralaan 1 - Building D, 3590 Diepenbeek, Belgium (W. Maes), Center for Education and Research on Macromolecules (CERM), University of Liège (Ulg), Chemistry Department, Sart-Tilman B6a, 4000 Liège, Belgium (C. Detrembleur). E-mail addresses: wouter.maes@uhasselt.be (W. Maes), christophe. detrembleur@ulg.ac.be (C. Detrembleur).
URI: http://hdl.handle.net/1942/18769
DOI: 10.1016/j.orgel.2015.01.033
ISI #: 000351638600012
ISSN: 1566-1199
Category: A1
Type: Journal Contribution
Validation: ecoom, 2016
Appears in Collections: Research publications

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