ORCID Profile
0000-0001-8994-0936
Current Organisations
VTT Technical Research Centre of Finland
,
VTT
,
Universidad de La laguna
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Publisher: American Astronomical Society
Date: 22-08-2017
Publisher: Oxford University Press (OUP)
Date: 10-11-2016
Publisher: American Astronomical Society
Date: 29-06-2017
Publisher: EDP Sciences
Date: 08-2023
Publisher: Wiley
Date: 22-06-2022
Abstract: The design and synthesis of three star‐shaped nonfullerene (NFA) acceptors, TPA‐2T‐INCN, TPA‐2T‐BAB, and TPA‐T‐INCN, based on a triphenylamine (TPA) core and linked through π ‐conjugated thiophene (T) spacers to different terminal units (3‐oxo‐2,3‐dihydro‐1H‐inden‐1‐ylidene) malononitrile, INCN, and 1,3‐dimethylbarbituric acid, BAB), are reported. These materials are blended with the widely used poly(3‐hexylthiophene‐2,5‐diyl) (P3HT) donor polymer and tested in flexible organic photovoltaics (OPVs). The NFAs capped with the strong electron‐withdrawing INCN unit perform best in OPVs. Both P3HT:TPA‐T‐INCN and P3HT:TPA‐2T‐INCN blends also show the highest photoluminescence quenching efficiency (95.8% and 92.6%, respectively). Surprisingly, when reducing the number of T spacers from 2 to 1, the solubility of the NFAs in o ‐dichlorobenzene increases, leading to easier processing during the OPV fabrication and better surface morphology. This explains the best performance of TPA‐T‐INCN‐based blends in OPVs, with a ch ion power conversion efficiency of 1.13%.
Location: France
No related grants have been discovered for Emma Fernández-Alvar.