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Isomer Dependence of Efficiency and Charge Recombination in Dye‐Sensitized Solar Cells Using Ru Complex Dyes Bearing Halogen Substituents
Author(s) -
Chadwick Nina,
Kumar D. Kishore,
Ivaturi Aruna,
Grew Benjamin A.,
Upadhyaya Hari M.,
Yellowlees Lesley J.,
Robertson Neil
Publication year - 2015
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201500633
Subject(s) - chemistry , substituent , halogen , ring (chemistry) , photochemistry , dye sensitized solar cell , stereochemistry , organic chemistry , alkyl , electrode , electrolyte
We have synthesised Ru(H 2 ‐dcbpy)( N , N′ ‐Y 2 ‐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 TiO 2 –dyes–I – /I 3 – interface affecting the performance of the dyes in DSSCs.