Charge separation and efficient light energy conversion in sensitized mesoscopic solar cells based on binary ionic liquids.

摘要: A 7.4% power conversion efficiency at air mass (AM) 1.5 full sunlight was reached with a mesoscopic solar cell employing new binary ionic liquid electrolyte composed of 1-propyl-3-methylimidazolium iodide and 1-ethyl-3-methylimidazolium tricyanomethanide in conjunction the amphiphilic ruthenium complex NaRu(4-carboxylic acid-4‘-carboxylate)(4,4‘-dinonyl-2,2‘-bipyridine)(NCS)2, coded as Z-907Na. Ultramicroelectrode voltammetric, nanosecond laser transient absorbance, photovoltaic measurements show that high concentration is required for dye regeneration to compete efficiently charge recombination. surprisingly fast reductive quenching process turned on pure melts. This channel unproductive, explaining lower photocurrents observed under these conditions.