Efficient near‐IR sensitization of nanocrystalline TiO2 films by zinc and aluminum phthalocyanines

Photoelectrochemical characterization of electrodepositedZnOthin films sensitized by octacarboxymetallophthalocyanine derivatives

“…Among the studied MOCPcs the Zn complex showed the highest conversion effi ciency and incident photon-to-current conversion effi ciency when compared to the Si-and Al-containing metallophthalocyanines. Such tendency was also found in earlier sensitization studies comparing Pcs or porphyrins with different central metals [20,27]. In a recent report, a low effi ciency despite suppressed aggregation was also reported for the sensitization of TiO 2 by a sterically hindered unsymmetric Pc [26] and explained by a small driving force for electron injection from the In view of the high APCE observed in our study indicating facile injection of an electron from the excited state of the sensitizer into the conduction band of ZnO and in view of the facile kinetics of sensitizer regeneration, we assign the low values of the conversion effi ciency to the present measurement geometry in a three-electrode cell with a crude non-optimized redox electrolyte chosen for the sake of good comparison of the different electrode materials.…”

IEA Agreement on the production and utilization of hydrogen: 1999 annual report

“…These results on improved light harvesting pigments are in good agreement with investigations conducted at the Swiss Federal Polytechnic School of Lausanne, where phthalocyanine (zinc, aluminum and ruthernium), naphthalocyanines, merocyanines and ruthenium complexes containing novel ligands have been identified as promising near-infrared sensitizers for the tandem dye-cell photosystem [Nazeeruddin et al, 1999]. Figure 3 illustrates a typical rutheniumnaphthalocyanine sample.…”

Near-IR Light-Sensitized Voltaic Conversion System Using Nanocrystalline TiO2 Film by Zn Chlorophyll Derivative Aggregate

“…In a previous report, the emission quenching processes of aluminum phthalocyanine adsorbed on nanocrystalline TiO 2 and Al 2 O 3 films were studied using time-resolved fluorescence spectroscopy . In our work, the quenching of fluorescence of ZnChl-e 6 is found to be due to electron injection from the excited singlet state of ZnChl-e 6 into the conduction band of TiO 2 particles.…”