Visible and near-infrared organic photosensitizers comprising isoindigo derivatives as chromophores: synthesis, optoelectronic properties and factors limiting their efficiency in dye solar cells
| Autor: | Emilio Palomares, Cyril Aumaitre, Núria López, Olivier Bardagot, Renaud Demadrille, Florent Caffy, Jesús Jover, Cristina Rodríguez-Seco, Yann Kervella |
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| Přispěvatelé: | Synthèse, Structure et Propriétés de Matériaux Fonctionnels, Laboratoire de Spectrométrie Physique (LSP), Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Institute of Chemical Research of Catalonia (ICIQ), SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé (SYMMES), Institut de Chimie du CNRS (INC)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-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)-Centre National de la Recherche Scientifique (CNRS), Universitat de Barcelona, Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-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) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Solar cells
Materials science Bacteris fotosintetitzadors 02 engineering and technology 010402 general chemistry 01 natural sciences 7. Clean energy law.invention chemistry.chemical_compound [SPI]Engineering Sciences [physics] law Ultrafast laser spectroscopy Solar cell Molecule [CHIM]Chemical Sciences General Materials Science Triiodide Spectroscopy Absorption (electromagnetic radiation) ComputingMilieux_MISCELLANEOUS Renewable Energy Sustainability and the Environment business.industry [CHIM.ORGA]Chemical Sciences/Organic chemistry Energy conversion efficiency [SPI.NRJ]Engineering Sciences [physics]/Electric power General Chemistry [CHIM.MATE]Chemical Sciences/Material chemistry Chromophore 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Photosynthetic bacteria Optoelectronics Cèl·lules solars 0210 nano-technology business |
| Zdroj: | Journal of Materials Chemistry A Journal of Materials Chemistry A, Royal Society of Chemistry, 2018, 6 (21), pp.10074-10084. ⟨10.1039/c8ta01826j⟩ Recercat. Dipósit de la Recerca de Catalunya instname Journal of Materials Chemistry A, 2018, 6 (21), pp.10074-10084. ⟨10.1039/c8ta01826j⟩ Dipòsit Digital de la UB Universidad de Barcelona |
| ISSN: | 2050-7488 |
| DOI: | 10.1039/c8ta01826j⟩ |
| Popis: | The development of ruthenium-free organic photosensitizers showing panchromatic absorption up to the near-infrared (NIR) region for application in dye-sensitized solar cells (DSSCs) is still scarce. Among the sensitizers with absorption beyond 700 nm and developed for DSSCs, only zinc-phthalocyanine and boron-dibenzopyrromethene-based dyes have been able to reach efficiencies as high as 6%. Here we report metal-free organic dyes based on isoindigo, thieno-isoindigo or benzo-thieno-isoindigo chromophores that absorb in the UV-visible and NIR spectral range up to 900 nm. These molecules, that exhibit purple, blue, or green hues, were used to sensitize TiO2 mesoporous electrodes in order to fabricate DSSCs with an iodide/triiodide-based electrolyte. Advanced photophysical characterizations, including charge extraction, transient photovoltage, and laser transient absorption spectroscopy experiments, combined with density functional theory modeling and computational investigations allow us to fully unravel the interfacial processes at the origin of the solar cell performances and to identify the limiting factors. A power conversion efficiency as high as 7% associated with a Jsc close to 19 mA cm−2 was obtained with one of the dyes, which is comparable to those of the best panchromatic organic dyes reported so far. We also demonstrate in this work that the Voc of the solar cells is linearly correlated to the dipolar moments of the oxidized dyes, the molecules possessing larger dipoles leading to the highest Voc values. |
| Databáze: | OpenAIRE |
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