Rational design of a neutral pH functional and stable organic photocathode

Abstract
In this work we lay out design guidelines for catalytically more efficient organic photocathodes achieving stable hydrogen production in neutral pH. We propose an organic photocathode architecture employing a NiO hole selective layer, a PCDTBT:PCBM bulk heterojunction, a compact TiO2 electron selective contact and a RuO2 nanoparticle catalyst. The role of each layer is discussed in terms of durability and function. With this strategically designed organic photocathode we obtain stable photocurrent densities for over 5 h and discuss routes for further performance improvement.

Citation
Francàs L, Burns E, Steier L, Cha H, Solà-Hernández L, et al. (2018) Rational design of a neutral pH functional and stable organic photocathode. Chemical Communications 54: 5732–5735. Available: http://dx.doi.org/10.1039/c8cc01736k.

Acknowledgements
We kindly thank the laboratory of photonics and interfaces (EPFL, Switzerland) for the permission to use their ALD setup. We acknowledge financial support from the European Research Council (project Intersolar 291482), K.A.U.S.T. (Project OSR2015-CRG4-2572), and MINECO/FEDER (CTQ2015-64261-R). L. F. thanks the EU for a Marie Curie fellowship (658270). J. G.-A. acknowledges the Serra Hunter Program.

Publisher
Royal Society of Chemistry (RSC)

Journal
Chemical Communications

DOI
10.1039/c8cc01736k

Additional Links
http://pubs.rsc.org/en/Content/ArticleLanding/2018/CC/C8CC01736K

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