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

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• 作者：Paolo Salvatori ; Gabriele Marotta ; Antonio Cinti ; Edoardo Mosconi ; Mallika Panigrahi ; Lingamallu Giribabu ; Mohammad K. Nazeeruddin ; Filippo De Angelis
• 关键词：Dye-sensitized solar cells (DSCs) ; Electrolyte ; Cobalt complex ; Terpyridine ; Chenodeoxycholic acid
• 刊名：Inorganica Chimica Acta
• 出版年：2013
• 出版时间：1 September, 2013
• 年：2013
• 卷：406
• 期：Complete
• 页码：106-112
• 全文大小：664 K

文摘

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.