Functionalization of a Ruthenium–Diacetylide Organometallic Complex as a Next‐Generation Push–Pull Chromophore |
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Authors: | Samuel De Sousa Dr. Laurent Ducasse Dr. Brice Kauffmann Prof. Thierry Toupance Dr. Céline Olivier |
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Affiliation: | 1. Université de Bordeaux, UMR‐CNRS 5255 Institut des Sciences Moléculaires, 351 cours de la Libération, 33405 Talence (France);2. Institut Européen de Chimie et Biologie, Université de Bordeaux, UMS‐3033 CNRS‐INSERM, 2 rue Robert Escarpit, 33600 Pessac (France) |
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Abstract: | The design and preparation of an asymmetric ruthenium–diacetylide organometallic complex was successfully achieved to provide an original donor–π–[M]–π–acceptor architecture, in which [M] corresponds to the [Ru(dppe)2] (dppe: bisdiphenylphosphinoethane) metal fragment. The charge‐transfer processes occurring upon photoexcitation of the push–pull metal–dialkynyl σ complex were investigated by combining experimental and theoretical data. The novel push–pull complex, appropriately end capped with an anchoring carboxylic acid function, was further adsorbed onto a semiconducting metal oxide porous thin film to serve as a photosensitizer in hybrid solar cells. The resulting photoactive material, when embedded in dye‐sensitized solar cell devices, showed a good spectral response with a broad incident photon‐to‐current conversion efficiency profile and a power conversion efficiency that reached 7.3 %. Thus, this material paves the way to a new generation of organometallic chromophores for photovoltaic applications. |
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Keywords: | electron transfer organometallic compounds ruthenium sensitizers solar cells |
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