Photoelectrochemical solar cells using[(dcbH2)2RuLL],L,L′= substituted pyridines, as nanocrystallineTiO2sensitizers

摘要

The development of thin-layer transparent solar cells based on dye sensitization of nanocrystallinen-typeTiO2undertaken at the Laboratory of Inorganic Photochemistry and Energy Conversionat the Chemistry Institute of Universidade de S?o Paulo is presented. Compounds of the formulacis-[(dcbH2)2RuLL],L,L′= substituted pyridines, as nanocrystallineTiO2,dcbH2=4,4′?(CO2H)2?2,2′-bipyridine andL,L′= substituted pyridines, have been successfullyemployed as molecular sensitizers in photoelectrochemical solar cells based on dye-sensitizationofn-TiO2. This regenerative solar cell consists of a TCO glass with a dye-sensitizedTiO2semiconductor film as a photoanode,I2/LiIsolution in acetonitrile as a redox mediator and a transparent Pt coated TCO glassas a counter electrode. Efficient conversion of visible light into electricity was achieved with IPCE (IncidentPhoton-to-Current Conversion Efficiency) as high as 50% between 400 and 550 nm.