Cyclometalated Ru(Ii) Complexes With Tunable Redox And Optical Properties For Dye-Sensitized Solar Cells

DALTON TRANSACTIONS(2020)

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摘要
Cyclometalated Ru(II) complexes with 2-arylbenzimidazole antenna ligands bearing electron-donor/withdrawing substituents and anchoring 4,4'-dimethoxycarbonyl-2,2'-bipyridine have been prepared and their structure, optical and electrochemical properties have been studied. The complexes possess enhanced light-harvesting characteristics compared to those of the standard N719 dye and absorb light up to 750 nm. In addition, they demonstrate reversible redox behavior with Ru3+/Ru2+ potentials being finely tuned by the change of the electron-donating ability of cyclometalated ligands. After a mild hydrolysis of dimethoxycarbonyl groups the excellent optical properties of the complexes remain unchanged and they show good efficiency when tested in dye-sensitized solar cells.
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关键词
complexes,ru<scp>ii</scp>,dye-sensitized
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