In:
Angewandte Chemie International Edition, Wiley, Vol. 58, No. 17 ( 2019-04-16), p. 5677-5681
Kurzfassung:
A new and highly efficient cathode interlayer material for organic photovoltaics (OPVs) was produced by integrating C 60 fullerene monomers into ionene polymers. The power of these novel “C 60 ‐ionenes” for interface modification enables the use of numerous high work‐function metals (e.g., silver, copper, and gold) as the cathode in efficient OPV devices. C 60 ‐ionene boosted power conversion efficiencies (PCEs) of solar cells, fabricated with silver cathodes, from 2.79 % to 10.51 % for devices with a fullerene acceptor in the active layer, and from 3.89 % to 11.04 % for devices with a non‐fullerene acceptor in the active layer, demonstrating the versatility of this interfacial layer. The introduction of fullerene moieties dramatically improved the conductivity of ionene polymers, affording devices with high efficiency by reducing charge accumulation at the cathode/active layer interface. The power of C 60 ‐ionene to improve electron injection and extraction between metal electrodes and organic semiconductors highlights its promise to overcome energy barriers at the hard‐soft materials interface to the benefit of organic electronics.
Materialart:
Online-Ressource
ISSN:
1433-7851
,
1521-3773
DOI:
10.1002/anie.201901536
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2019
ZDB Id:
2011836-3
ZDB Id:
123227-7
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