Rational design of a neutral pH functional and stable organic photocathode

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.

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.

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.

Royal Society of Chemistry (RSC)

Chemical Communications


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