Two-in-one: cathode modification and improved solar cell blend stability through addition of modified fullerenes
Date
2016
Authors
George, Z.
Xia, Y.
Sharma, A.
Lindqvist, C.
Andersson, G.G.
Inganäs, O.
Moons, E.
Muller, C.
Andersson, M.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Journal of Materials Chemistry A, 2016; 4(7):2663-2669
Statement of Responsibility
Conference Name
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.
School/Discipline
Dissertation Note
Provenance
Description
Access Status
Rights
Copyright 2016 The Royal Society of Chemistry. This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes. (https://creativecommons.org/licenses/by-nc/3.0/)