| Title | A Dendritic Oligothiophene Ruthenium Sensitizer for Stable Dye-Sensitized Solar Cells. | | Author(s) | Sauvage F, Fischer MK, Mishra A, Zakeeruddin SM, Nazeeruddin MK, Bäuerle P, Grätzel M | | Institution | Laboratoire de Photonique et Interfaces, Institut des Sciences et Ingénieurie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 6, 1015 Lausanne (Switzerland), Fax: (+41) 21-6934-1111. | | Source | ChemSusChem 2009 Jun 30. | | Abstract | We report a new type of dendritic terthiophene attached to a 2,2'-bipyridine ligand for ruthenium-based dye-sensitized solar cells. As a result of the incorporation of this electron-rich terthiophene donor unit into the heteroleptic ruthenium sensitizer [Ru(dcbpy)(3Tbpy)(NCS)(2)] (3T), the lowest-energy metal-to-ligand charge transfer (MLCT) transition is red-shifted and the molar extinction coefficient is increased compared to the analogous standard Z907Na sensitizer. A preliminary investigation of the 3T dye in combination with an iodine/iodide-based electrolyte shows an interesting photovoltaic performance, with a maximum power conversion efficiency of 7.4 % measured under air mass 1.5 global sunlight irradiation. Accelerated testing of these devices at 60 degrees C under full sunlight soaking shows a remarkable stability over 1000 h. | | Language | ENG | | Pub Type(s) | JOURNAL ARTICLE
| | PubMed ID | 19569164 |
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