PHOTOSENSITIZATION OF WIDE BANDGAP SEMICONDUCTORS WITH ANTENNA MOLECULES

Polynuclear metal complexes, supporting efficient intramolecular energ y transfer processes, can be used to increase the light harvesting eff iciency of sensitized wide bandgap semiconductors. Experimental studie s are discussed to emphasize: (i) how structural changes at the molecu lar level may affect the performances of photoelectrochemical cells ba sed on antenna-sensitizer molecular assemblies, (ii) the availability of fast time-resolved resonance Raman and infrared spectroscopies for monitoring intercomponent energy transfer processes, and (iii) the pos sibility to design extended antenna units acting as molecular conduits for long-range energy transfer.