DESIGN, SYNTHESIS AND CHARACTERIZATION OF AMPHIPHILIC BIPYRIDYL RUTHENIUM(II) SENSITIZERS

摘要

Dye-sensitized solar cells (DSC), as a new innovation technology, have developed very quickly in the past decade since the breakthrough was accomplished by attaching ruthenium polypyridyl complexes to high surface area titania film electrode. Gr鋞zel and co-workers have developed DSC with the efficiency over 10% under AM 1.5 solar radiation using cis-Ru(dcbpy)2(NCS)2 (known as the N3 dye, Where dcbpy = 2,2'-bipyridyl-4,4'-dicarboxylic acid) as sensitizer, in conjunction with organic solvent electrolyte containing iodide/triiodide redox couple. However, the disadvantages of exhibiting high energy absorption bands which only harvest a fraction of visible light and easy desorption from the titanium dioxide surface have restrict the practical application of dye-sensitized solar cells. In this paper, a few new amphiphilic sensitizers that have the wide spectral coverage range have been synthesized in one-pot reaction. And the structure and the photophysical and photochemical properties were characterized by UV-Visible absorption, FT-IR, emission, 1H-NMR spectra and cyclic voltammonium. The relationship of the structure and the photophysical properties has been discussed. The amphiphilic ruthenium complex K005 and K017 based on 2,2'-bipyridyl-4, 4'-dicarboxylic acid, 4,7-dihydroxy-1,10-phenanthroline and hydrophobic bipyridyl ligands have acted as efficient sensitizer for solar-electric conversion efficiency.