A new terpyridine cobalt complex redox shuttle for dye-sensitized solar cells

A 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.


Published in:
Inorganica Chimica Acta, 406, 106-112
Year:
2013
Publisher:
Lausanne, Elsevier
ISSN:
0020-1693
Keywords:
Laboratories:




 Record created 2013-11-04, last modified 2018-03-17


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