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Title: | Designing Small Molecule Organic Solar Cells with High Open-Circuit Voltage | Authors: | KUDRJASOVA, Julija VAN LANDEGHEM, Melissa VANGERVEN, Tim KESTERS, Jurgen HEINTGES, Gael CARDINALETTI, Ilaria LENAERTS, Ruben PENXTEN, Huguette ADRIAENSENS, Peter LUTSEN, Laurence VANDERZANDE, Dirk MANCA, Jean Goovaerts, Etienne MAES, Wouter |
Issue Date: | 2017 | Publisher: | WILEY-V C H VERLAG GMBH | Source: | CHEMISTRYSELECT, 2(3), p. 1253-1261 | Abstract: | Three extended 2,5-dithienylthiazolo[5,4-d] thiazole-based small molecule chromophores are prepared via a sustainable direct arylation approach and their physicochemical and opto-electrical material characteristics are analyzed toward integration in solution-processed bulk heterojunction organic photo-voltaics. Efficient charge separation and high values of the charge transfer state energy are derived from sensitive ground and excited state absorption and photoluminescence measurements on blends of the thiazolo[5,4-d] thiazole-based electron donor components with the PC71BM fullerene acceptor. Upon implementation in organic solar cells, a maximum power conversion efficiency of 2.7% and particularly high open-circuit voltages (0.93 - 0.98 V) are observed, which are correlated to the charge transfer state energies as derived from photoluminescence, Fourier transform photocurrent spectroscopy and combined electrochemical and photophysical data. Furthermore, several loss processes at the origin of the modest short-circuit current densities and fill factors are elucidated. | Notes: | [Kudrjasova, Julija; Vangerven, Tim; Kesters, Jurgen; Heintges, Gael H. L.; Cardinaletti, Ilaria; Lenaerts, Ruben; Penxten, Huguette; Adriaensens, Peter; Vanderzande, Dirk; Maes, Wouter] UHasselt Hasselt Univ, Inst Mat Res IMO IMOMEC, Design & Synth Organ Semicond DSOS Mat Phys NMR, Agoralaan, B-3590 Diepenbeek, Belgium. [Kudrjasova, Julija; Vangerven, Tim; Kesters, Jurgen; Cardinaletti, Ilaria; Lenaerts, Ruben; Adriaensens, Peter; Lutsen, Laurence; Vanderzande, Dirk; Maes, Wouter] IMEC VZW, Associated Lab IMOMEC, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. [Van Landeghem, Melissa; Goovaerts, Etienne] Univ Antwerp, Dept Phys, Univ Pl 1, B-2610 Antwerp, Belgium. [Heintges, Gael H. L.] Eindhoven Univ Technol, Inst Complex Mol Syst Mol Mat & Nanosyst, POB 513, NL-5600 MB Eindhoven, Netherlands. [Manca, Jean] UHasselt Hasselt Univ, Agoralaan, B-3590 Diepenbeek, Belgium. | Keywords: | charge transfer; direct arylation; donor-acceptor systems; organic photovoltaics; organic semiconductors;charge transfer; direct arylation; donor-acceptor systems; organic photovoltaics; organic semiconductors | Document URI: | http://hdl.handle.net/1942/24020 | ISSN: | 2365-6549 | e-ISSN: | 2365-6549 | DOI: | 10.1002/slct.201601915 | ISI #: | 000395533100065 | Rights: | (c) 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2018 |
Appears in Collections: | Research publications |
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