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

Zandra George (Institutionen för kemi och kemiteknik, Polymerteknologi) ; Y. X. Xia ; A. Sharma ; C. Lindqvist ; G. Andersson ; O. Inganas ; E. Moons ; Christian Müller (Institutionen för kemi och kemiteknik, Polymerteknologi) ; Mats R. Andersson (Institutionen för kemi och kemiteknik, Polymerteknologi)
Journal of materials chemistry A (2050-7488). Vol. 4 (2016), 7, p. 2663-2669.
[Artikel, refereegranskad vetenskaplig]

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.

Denna post skapades 2016-03-02.
CPL Pubid: 232658


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Institutionen för kemi och kemiteknik, Polymerteknologi



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