Functional supramolecular ruthenium cyclodextrin dyes for nanocrystalline solar cells

Jonathan Faiz, AI Philippopoulos, AG Kontos, P Falaras, Zoe Pikramenou

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


A suprarnolecular complex [Ru(dcb)2(a-CD-5-bPY)]Cl2 (1-α-CD) (dcb=4,4'-dicarboxyl-2,2'-bipyfidine, α-CD-5-bpy= 6-mono[5-methyl(5'-methyl-2,2'-bipyridyl)]-permethylated α-CD) (CD: cyclodextrin) based on a ruthenium tris-bipyridyl core with an appended α-CD cavity is designed and synthesisled, in order to facilitate dye/redox couple interaction and dye regeneration in nanocrystalline TiO2 solar cells. The luminescent complex is fully characterized and anchored on mesoporous titania electrodes showing increased power-conversion efficiency in solid-state dye-sensitized solar cells using a composite polymer electrolyte. Direct comparison of the properties of the CD complex with an analogous ruthenium complex [Ru(dcb)2(5,5'-dmbpy)] Cl2 (2) (5,5'-dmbpy = 5,5'-dimethylbipyridin) without the CD cavity reveals that the photovoltaic performance of 1-α- CD is enhanced by about 40 % compared, to 2. Independent studies have shown complexation of the iodide redox couple to the CD in 1-α-CD. These results indicate that the CD moiety is able to act as a mediator and fine tune the photoelectrolyte interface.
Original languageEnglish
Pages (from-to)54-58
Number of pages5
JournalAdvanced Functional Materials
Issue number1
Early online date15 Nov 2006
Publication statusPublished - 5 Jan 2007


  • Nanocrystalline materials
  • Ruthenium complexes
  • Solar cells, dye‐sensitized
  • Titanium oxides


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