European Journal of Inorganic Chemistry p. 4878 - 4884 (2015)
Update date:2022-08-17
Topics:
Chadwick, Nina
Kumar, D. Kishore
Ivaturi, Aruna
Grew, Benjamin A.
Upadhyaya, Hari M.
Yellowlees, Lesley J.
Robertson, Neil
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.
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