Publication date: 15th December 2014
Efficient solar-to-fuel conversion can be a cost-effective way to power the planet with sunlight. Despite organic photovoltaic materials have experienced extraordinary development; their application for solar fuel production has been very little explored. To date, there exists a gap between the theoretically achievable photocurrent and practical results obtained with Organic Photoelectrochemical Cells (OPEC) [1, 2], and a detailed understanding of the interface processes is needed. Herein, we achieve OPEC with the extraction of unprecedented photocurrent in the scale of mA·cm-2, that is comparable to a solid-state device with similar optical properties [3]. We demonstrate that OPEC constitutes a versatile platform for the efficient production of solar fuels that provide either oxidative or reductive chemistry by a careful choice of the selective contact and the redox couple in the liquid medium. The comprehensive study of the energetic aspects of the OPEC configuration provides the design rules to drive the desired electrochemical reaction, as for example the production of H2 by means of cobaloxime homogeneous catalyst.
References:
[1] E. Lanzarini, M. R. Antognazza, M. Biso, A. Ansaldo, L. Laudato, P. Bruno, P. Metrangolo, G. Resnati, D. Ricci, G. Lanzani J. Phys. Chem. C 116, 10944 (2012)
[2] T. Bourgeteau, D. Tondelier, B. Geffroy, R. Brisse, C. Laberty-Robert, S. Campidelli, R, de Bettignies, V. Artero, S. Palacin, B. Joudusselme Energ. Environ. Sci. 6, 2706 (2013)
[3] A. Guerrero, M. Haro, S. Bellani, M. R. Antognazza, L. Meda, S. Gimenez, J. Bisquert Energ. Environ. Sci. 7, 3666 (2014)
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