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Issue 7, 2016
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Two-in-one: cathode modification and improved solar cell blend stability through addition of modified fullerenes

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Abstract

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 °C. As a result, the device performance is retained, which promises significantly increased thermal stability of the bulk-heterojunction blend nanostructure.

Graphical abstract: Two-in-one: cathode modification and improved solar cell blend stability through addition of modified fullerenes

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Publication details

The article was received on 15 Aug 2015, accepted on 19 Jan 2016 and first published on 21 Jan 2016


Article type: Paper
DOI: 10.1039/C5TA06420A
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Citation: J. Mater. Chem. A, 2016,4, 2663-2669
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    Two-in-one: cathode modification and improved solar cell blend stability through addition of modified fullerenes

    Z. George, Y. Xia, A. Sharma, C. Lindqvist, G. Andersson, O. Inganäs, E. Moons, C. Müller and M. R. Andersson, J. Mater. Chem. A, 2016, 4, 2663
    DOI: 10.1039/C5TA06420A

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