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Two-in-one: Cathode modification and improved solar cell blend stability through addition of modified fullerenes
Chalmers, Dept Chem & Chem Engn, SE-41296 Gothenburg, Sweden..
Linkoping Univ, IFM, Biomol & Organ Elect, SE-58183 Linkoping, Sweden.;Linkoping Univ, Ctr Organ Elect, SE-58183 Linkoping, Sweden..
Univ S Australia, Future Ind Inst, Mawson Lakes, SA 5095292, Australia..
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Physics.
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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) Published
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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
2016. Vol. 4, no 7, 2663-2669 p.
National Category
Chemical Engineering
Research subject
Chemical Engineering
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URN: urn:nbn:se:kau:diva-41125DOI: 10.1039/c5ta06420aISI: 000369665800033OAI: oai:DiVA.org:kau-41125DiVA: diva2:914174
Available from: 2016-03-23 Created: 2016-03-23 Last updated: 2016-03-23Bibliographically approved

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