Isomer dependence of efficiency and charge recombination in dye-sensitized solar cells using Ru complex dyes bearing halogen substituents

Nina Chadwick, D. Kishore Kumar, Aruna Ivaturi, Benjamin A. Grew, Hari M. Upadhyaya, Lesley J. Yellowlees, Neil Robertson

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We have synthesised Ru(H2-dcbpy)(N,N'-Y2-bpy)(NCS)2 dyes (where N = 4, 5; Y = F, Cl, Br; N is the position on the bipyridyl ring where the halogen substituent is located) for dye-sensitised solar cells. We show that careful consideration of the position of the substituent, in conjunction with the nature of the substituents, on a bpy ring is important to optimize the solar cells performance. Changing the position (from 4,4' to 5,5') along with the nature of the halogen (F, Cl, or Br) substituents were observed to cause changes in the electronic and spectroscopic properties of the dyes as well as influence the recombination rates at the TiO2-dyes-I-/I3- interface affecting the performance of the dyes in DSSCs. Changing the position (from 4,4' to 5,5') along with the nature of the halogen (F, Cl, or Br) substituents affects the electronic and spectroscopic properties of the Ru(H2-dcbpy)(N,N'-Y2-bpy)(NCS)2 dyes as well as the recombination rates at the TiO2-dyes-I-/I3- interface hence affecting the performance of the dyes in DSSCs.

Original languageEnglish
Pages (from-to)4878-4884
Number of pages7
JournalEuropean Journal of Inorganic Chemistry
Volume2015
Issue number29
Early online date11 Sep 2015
DOIs
Publication statusPublished - 31 Oct 2015

Keywords

  • charge recombination
  • dye-sensitised solar cells
  • ruthenium complexes
  • solar cells

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