Search

Your search keyword '"Bold, Sébastian"' showing total 5 results
Start Over Author "Bold, Sébastian"
5 results on '"Bold, Sébastian"'

5. Photocathodes beyond NiO:charge transfer dynamics in a π‑conjugated polymer functionalized with Ruphotosensitizers

Author

Wahyuono, Ruri A., Seidler, Bianca, Bold, Sébastian, Dellith, Andrea, Dellith, Jan, Ahner, Johannes, Wintergerst, Pascal, Lowe, Grace, Hager, Martin D., Wächtler, Maria, Streb, Carsten, Schubert, Ulrich S., Rau, Sven, Dietzek, Benjamin, Leibniz Institute of Photonic Technology Jena, Department Functional Interfaces, Albert-Einstein-Straße 9, 07745 Jena, Germany, Institute of Physical Chemistry, Department of Engineering Physics, Institut Teknologi Sepuluh, Institute of Inorganic Chemistry I., Solar fuels, hydrogen and catalysis (SolHyCat), Laboratoire de Chimie et Biologie des Métaux (LCBM - UMR 5249), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA), Institute of Organic Chemistry and Macromolecular Chemistry [Friedrich Schiller University Jena] (IOMC), Friedrich-Schiller-Universität = Friedrich Schiller University Jena [Jena, Germany], Center for Energy and Environmental Chemistry (CEEC Jena), and Laboratory of Organic and Macromolecular Chemistry (IOMC)

Subjects
[CHIM.POLY]Chemical Sciences/Polymers
Abstract

International audience; A conductive polymer (poly(p-phenylenevinylene), PPV) was covalently modified with Ru-II complexes to develop an all-polymer photocathode as a conceptual alternative to dye-sensitized NiO, which is the current state-of-the-art photocathode in solar fuels research. Photocathodes require efficient light-induced charge-transfer processes and we investigated these processes within our photocathodes using spectroscopic and spectro-electrochemical techniques. Ultrafast hole-injection dynamics in the polymer were investigated by transient absorption spectroscopy and charge transfer at the electrode-electrolyte interface was examined with chopped-light chronoamperometry. Light-induced hole injection from the photosensitizers into the PPV backbone was observed within 10 ps and the resulting charge-separated state (CSS) recombined within similar to 5 ns. This is comparable to CSS lifetimes of conventional NiO-photocathodes. Chopped-light chronoamperometry indicates enhanced charge-transfer at the electrode-electrolyte interface upon sensitization of the PPV with the Ru-II complexes and p-type behavior of the photocathode. The results presented here show that the polymer backbone behaves like classical molecularly sensitized NiO photocathodes and operates as a hole accepting semiconductor. This in turn demonstrates the feasibility of all-polymer photocathodes for application in solar energy conversion.

Published
2021
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results