Suppression of Thermally Induced Fullerene Aggregation in Polyfullerene-Based Multiacceptor Organic Solar Cells

Journal article
(Original article)


Publication Details

Author(s): Dowland SA, Salvador MF, Perea Ospina JD, Gasparini N, Langner S, Rajoelson S, Ramanitra HH, Lindner B, Osvet A, Brabec C, Hiorns RC, Egelhaaf HJ
Journal: ACS Applied Materials and Interfaces
Publisher: American Chemical Society
Publication year: 2017
Volume: 9
Journal issue: 12
Pages range: 10971-10982
ISSN: 1944-8244
eISSN: 1944-8252
Language: English


Abstract


A novel main-chain polyfullerene, poly[fullerene-alt-2,5-bis(octyloxy)terephthalaldehyde] (PPC4), is investigated for its hypothesized superior morphological stability as an electron-accepting material in organic photovoltaics relative to the widely used fullerene phenyl-C61-butyric acid methyl ester (PCBM). When mixed with poly(3-hexylthiophene-2,5-diyl) (P3HT), PPC4 affords low-charge-generation yields because of poor intermixing within the blend. The adoption of a multiacceptor system, by introducing PCBM into the P3HT:polyfullerene blend, was found to lead to a 3-fold enhancement in charge generation, affording power conversion efficiencies very close to that of the prototypical P3HT:PCBM binary control. Upon thermal stressing and in contrast to the P3HT:PCBM binary, photovoltaic devices based on the multiacceptor system demonstrated significantly improved stability, outperforming the control because of suppression of the PCBM migration and aggregation processes responsible for rapid device failure. We rationalize the influence of the fullerene miscibility and its implications on the device performance in terms of a thermodynamic model based on Flory-Huggins solution theory. Finally, the potential universal applicability of this approach for thermal stabilization of organic solar cells is demonstrated, utilizing an alternative low-band-gap polymer-donor system.



FAU Authors / FAU Editors

Brabec, Christoph Prof. Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Gasparini, Nicola
Institute Materials for Electronics and Energy Technology (i-MEET)
Langner, Stefan
Institute Materials for Electronics and Energy Technology (i-MEET)
Lindner, Benjamin Dr.
Lehrstuhl für Organische Chemie I
Osvet, Andres Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Perea Ospina, Jose Dario
Institute Materials for Electronics and Energy Technology (i-MEET)
Salvador, Michael Filipe Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)


Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials


External institutions with authors

Bayerisches Zentrum für Angewandte Energieforschung e.V. (ZAE Bayern)
University of Pau and Pays de l'Adour / Université de Pau et des Pays de l'Adour (UPPA)


Research Fields

B Nanoelectronic Materials
Exzellenz-Cluster Engineering of Advanced Materials
Neue Materialien und Prozesse
Research focus area of a faculty: Technische Fakultät


How to cite

APA:
Dowland, S.A., Salvador, M.F., Perea Ospina, J.D., Gasparini, N., Langner, S., Rajoelson, S.,... Egelhaaf, H.-J. (2017). Suppression of Thermally Induced Fullerene Aggregation in Polyfullerene-Based Multiacceptor Organic Solar Cells. ACS Applied Materials and Interfaces, 9(12), 10971-10982. https://dx.doi.org/10.1021/acsami.7b00401

MLA:
Dowland, Simon A., et al. "Suppression of Thermally Induced Fullerene Aggregation in Polyfullerene-Based Multiacceptor Organic Solar Cells." ACS Applied Materials and Interfaces 9.12 (2017): 10971-10982.

BibTeX: 

Last updated on 2019-15-05 at 10:33