Salvatori, PaoloMarotta, GabrieleCinti, AntonioMosconi, EdoardoPanigrahi, MallikaGiribabu, LingamalluNazeeruddin, Mohammad K.De Angelis, Filippo2013-11-042013-11-042013-11-04201310.1016/j.ica.2013.07.003https://infoscience.epfl.ch/handle/20.500.14299/96677WOS:000324325200015A new cobalt-terpyridine redox shuttle ([Co(Cl-phenyl-terpyridine)(2)](2+/3+)) has been synthesized, characterized, computationally investigated and then tested in photovoltaic devices, in conjunction with the prototypical N719 and Z907 ruthenium dyes. Lower efficiencies compared to the reference [Co(bpy)(3)](2+/3+) redox couple were obtained, probably due to increased recombination processes. Improvements in the devices performances were obtained by using chenodeoxycholic acid as surface co-adsorbent and as an electrolyte additive. Moreover, to better rationalize the photovoltaic results, the effect of two different counterions (TFSI and PF6) has been investigated for the reference [Co(bpy)(3)](2+/3+) electrolyte, finding a reduced efficiency for the TFSI-based electrolyte. (C) 2013 Elsevier B.V. All rights reserved.Dye-sensitized solar cells (DSCs)ElectrolyteCobalt complexTerpyridineChenodeoxycholic acidtext::journal::journal article::research article