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Title: Novel bis-C-60 derivative compared to other fullerene bis-adducts in high efficiency polymer photovoltaic cells
Authors: Voroshazi, Eszter ×
Vasseur, Karolien
Aernouts, Tom
Heremans, Paul
Baumann, Andreas
Deibel, Carsten
Xue, Xiang
Herring, Angela J
Athans, Andreas J
Lada, Tom A
Richter, Henning
Rand, Barry P #
Issue Date: 2011
Publisher: Royal Society of Chemistry
Series Title: Journal of Materials Chemistry vol:21 issue:43 pages:17345-17352
Abstract: We report the application of novel mono- and bis-o-quino-dimethane C-60 (oQDMC(60)) adducts in bulk heterojunction photovoltaic devices. When blended with poly(3-hexylthiophene), the fullerene adducts presented here have an enhanced open-circuit voltage of 640 mV and 820 mV, while preserving high short-circuit current and fill factor, resulting in efficiencies of 4.1% and 5.2%, respectively. Detailed assessment of material properties relevant to photovoltaic devices such as energy levels, charge carrier mobility, absorption and solubility further complements the evaluation. Increased fullerene solubility hindering phase segregation in blends with bis-oQDMC(60) has been circumvented by an in-depth morphology optimization assisted by absorption spectroscopy, X-ray reflectivity and atomic force microscopy. This optimized preparation could also serve as a guide for implementation of similar fullerene derivatives. Furthermore, we compare bis-oQDMC(60) to previously reported fullerene bis-adducts to provide insight into this emerging class of materials.
ISSN: 0959-9428
Publication status: published
KU Leuven publication type: IT
Appears in Collections:ESAT - MICAS, Microelectronics and Sensors
Surface and Interface Engineered Materials
× corresponding author
# (joint) last author

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