Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 23, Issue 26, Pages 6277-6281Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201701066
Keywords
chirality; enantiopurity; helicene; non-fullerene; organic photovoltaics
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Funding
- Ministere de la Recherche
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Impact of the enantiopurity on organic photovoltaics (OPV) performance was investigated through the synthesis of racemic and enantiomerically pure naphthalimide end-capped helicenes and their application as non-fullerene molecular electron acceptors in OPV devices. A very strong increase of the device performance was observed by simply switching from the racemic to the enantiopure forms of these -helical non-fullerene acceptors with power conversion efficiencies jumping from 0.4 to about 2.0% in air-processed poly(3-hexylthiophene)-based devices, thus highlighting the key role of enantiopurity in the photovoltaic properties.
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