Interface engineering of graphene for universal applications as both anode and cathode in organic photovoltaics.

Abstract:

:The high transparency of graphene, together with its good electrical conductivity and mechanical robustness, enable its use as transparent electrodes in optoelectronic devices such as solar cells. While initial demonstrations of graphene-based organic photovoltaics (OPV) have been promising, realization of scalable technologies remains challenging due to their performance and, critically, poor device reproducibility and yield. In this work, we demonstrate by engineering the interface between graphene and organic layers, device performance and yield become close to devices using indium tin oxide. Our study confirms that the key issue leading to the poor performance or irreproducibility in graphene-based OPV originates from the graphene interface, and can be addressed by a simple interface modification method introduced in this work. We also show similar approach allows graphene to be used as cathode in inverted OPV geometry, thereby demonstrating the universal application of graphene as transparent conductors for both the anode and cathode.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Park H,Chang S,Smith M,Gradečak S,Kong J

doi

10.1038/srep01581

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

1581

issn

2045-2322

pii

srep01581

journal_volume

3

pub_type

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