期刊
ENERGY & ENVIRONMENTAL SCIENCE
卷 6, 期 6, 页码 1796-1801出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ee24512h
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资金
- Cluster of Excellence Engineering of Advanced Materials at the University of Erlangen-Nuremberg
- German Research Foundation (DFG) within the framework of its Excellence Initiative
- DFG [BR 4031/2-1]
- Solar Technologies go Hybrid (SolTech) projects
This article presents a smart strategy to successfully tackle two main limitations of organic solar cells (OSCs) in one step: the narrow absorption window of polymers as well as the V-oc limitation related to the mono-PCBM. We demonstrate the high OSC performance of >5% in the combination of a fullerene multiadduct, i.e. indene-C60 bisadduct (ICBA) with a low bandgap polymer employing the concept of ternary OSCs. Solar cells achieving a fill factor (FF) of >60% along with high quantum efficiency in the near IR region are demonstrated for ternary composites consisting of P3HT, the fullerene-bisindene adduct of ICBA and a low bandgap copolymer sensitizer. Using P3HT as an efficient transport matrix with non-Langevin recombination dynamics allowed us to limit and overcome the otherwise dominant recombination losses of the indene-C60 bisadduct - low bandgap copolymer blends. The success of this strategy resulted in a relative efficiency improvement of over 25%.
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