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Three novel organic dyes, coded TK1, TK2 and TK3, incorporating two donor moieties, cyanoacrylic acid as an acceptor/anchoring group, the dibenzofulvene core and an oligothiophene spacer in a 2D–π–A system, were designed, synthesized, and successfully utilized in dye-sensitized solar cells. The dye TK3, containing two thiophene rings as spacers, shows an IPCE action spectrum with a high plateau from 390 nm to 600 nm, increased open-circuit photovoltage by 40 mV and short-circuit photocurrent by 7.03 mA cm−1, with respect to TK1. Using CDCA as the co-adsorbent material, the Jsc of TK3 was increased to 14.98 mA cm−1 and a strong enhancement in the overall conversion efficiency (7.45%) was realized by TK3 compared to TK1 (1.08%), in liquid electrolyte-based DSSCs.
Royal Society of Chemistry
Publication date: 
1 Jan 2014

Agostina Lina Capodilupo, Luisa De Marco, Eduardo Fabiano, Roberto Giannuzzi, Angela Scrascia, Claudia Carlucci, Giuseppina Anna Corrente, Maria Pia Cipolla, Giuseppe Gigli, Giuseppe Ciccarella

Biblio References: 
Volume: 2 Issue: 34 Pages: 14181-14188
Journal of Materials Chemistry A