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

作者：Salvatori Paolo; Marotta Gabriele; Cinti Antonio; Mosconi Edoardo; Panigrahi Mallika; Giribabu Lingamallu; Nazeeruddin Mohammad K; De Angelis Filippo^*

来源：Inorganica Chimica Acta, 2013, 406: 106-112.

DOI：10.1016/j.ica.2013.07.003

• Dye-sensitized solar cells (DSCs)
• Electrolyte
• Cobalt complex
• Terpyridine
• Chenodeoxycholic acid

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.

• 出版日期2013-9-1