Two novel self-assemblies of supramolecular solar cells using N-heterocyclic-anchoring porphyrins

摘要

AbstractTwo novel N-substituted anchoring porphyrins (ZnPAtz and ZnPAim) have been devised and synthesized. Moreover, these two anchoring porphyrins were linked to the TiO2semiconductor through carboxyl groups and then a zinc porphyrin ZnP was bound to the anchoring porphyrin using a zinc-to-ligand axial coordination approach. The different performances of these assemblies were compared with single anchoring porphyrin devices ZnPAtz and ZnPAim. The photoelectric conversion efficiency of the new supramolecular solar cells sensitized by ZnP-ZnPAx (x=tz, im) has been improved. The ZnP-ZnPAtz-based DSSCs provided the highest photovoltaic efficiency (1.86%). Fundamental studies showed that incorporation of these assemblies promote light-harvesting efficiency.Graphical AbstractTwo new self-assemblies based on a porphyrin ZnP bearing 1,3,5-triazine-2,4-diamine unit and two N-substituted anchoring porphyrins (ZnPAtz and ZnPAim) via zinc-to-ligand axial coordinated assemblies. These assemblies were then immobilized on a TiO2electrode surface for impressive improvement of photocurrent response in supramolecular solar cells.Display Omitted展开▼