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Two-in-one: cathode modification and improved solar cell blend stability through addition of modified fullerenes
Chalmers, Sweden.
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, Faculty of Science & Engineering.
University of S Australia, Australia.
Karlstad University, Sweden.
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2016 (English)In: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 4, no 7, 2663-2669 p.Article in journal (Refereed) PublishedText
Abstract [en]

The synthesis of dual purpose modified fullerenes with pyridine-as well as amine-functional groups is reported. Addition of these fullerenes to a polymer : fullerene bulk-heterojunction blend based on a thiophene-quinoxaline donor polymer is found to modify the active layer/cathode interface of inverted solar cells (glass/ITO/active layer/MoO3/Al). In particular the open-circuit voltage of devices is increased from 0.1 V to about 0.7 V, which results in a drastic rise in photovoltaic performance with a power conversion efficiency of up to 3%. At the same time, presence of the functionalised fullerene additives prevents the detrimental formation of micrometre-sized fullerene crystals upon annealing at 140 degrees C. As a result, the device performance is retained, which promises significantly increased thermal stability of the bulk-heterojunction blend nanostructure.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY , 2016. Vol. 4, no 7, 2663-2669 p.
National Category
Biological Sciences
URN: urn:nbn:se:liu:diva-125692DOI: 10.1039/c5ta06420aISI: 000369665800033OAI: diva2:908198

Funding Agencies|Swedish Energy Agency; Swedish Research Council; Knut and Alice Wallenberg Foundation; Chinese Scholarship Council (CSC); South Australian government

Available from: 2016-03-01 Created: 2016-02-29 Last updated: 2016-03-01

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Xia, YuxinInganäs, Olle
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