An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
New organic dyes that contain variable lengths of conjugation, featuring oligothiophene and aryla... more New organic dyes that contain variable lengths of conjugation, featuring oligothiophene and arylamines at the 2-and 3-position, have been synthesized. These compounds are characterized by photophysical, electrochemical, and theoretical computational methods. Nanocrystalline TiO 2-based dye-sensitized solar cells were fabricated using these molecules as light-harvesting sensitizers. The overall efficiencies of the sensitized cells range from 4.11 to 6.15%, compared to a cis-di(thiocyanato)-bis(2,2′-bipyridyl)-4,4′-dicarboxylate ruthenium(II)-sensitized device (7.86%) fabricated and measured under similar conditions. The devices made from these compounds have higher open-circuit voltage (V OC) compared to oligothiophene congeners with arylamines at the 2-position only. The hydrophobic segment at the 3-position appears to help retarding the charge transfer from the conduction band of TiO 2 to the electrolyte, I 3-. Supplementary studies of the transient photovoltage and electrochemical impedance are in support of retarded charge transfer of TiO 2 (e-) with both oxidized sensitizer and I 3-. Computation on a pair of compounds with and without arylamines at 3-position indicates that the former has larger charge transfer efficiency at the electronically excited state.
An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
New organic dyes that contain variable lengths of conjugation, featuring oligothiophene and aryla... more New organic dyes that contain variable lengths of conjugation, featuring oligothiophene and arylamines at the 2-and 3-position, have been synthesized. These compounds are characterized by photophysical, electrochemical, and theoretical computational methods. Nanocrystalline TiO 2-based dye-sensitized solar cells were fabricated using these molecules as light-harvesting sensitizers. The overall efficiencies of the sensitized cells range from 4.11 to 6.15%, compared to a cis-di(thiocyanato)-bis(2,2′-bipyridyl)-4,4′-dicarboxylate ruthenium(II)-sensitized device (7.86%) fabricated and measured under similar conditions. The devices made from these compounds have higher open-circuit voltage (V OC) compared to oligothiophene congeners with arylamines at the 2-position only. The hydrophobic segment at the 3-position appears to help retarding the charge transfer from the conduction band of TiO 2 to the electrolyte, I 3-. Supplementary studies of the transient photovoltage and electrochemical impedance are in support of retarded charge transfer of TiO 2 (e-) with both oxidized sensitizer and I 3-. Computation on a pair of compounds with and without arylamines at 3-position indicates that the former has larger charge transfer efficiency at the electronically excited state.
Uploads
Papers by Imen Talbi