Abstract
Novel push-pull thieno[2,3-b]indole-based dyes for efficient dye-sensitized solar cells (DSSCs)
Highlights
Photovoltaic devices, based on crystalline, inorganic semiconductors, have reached impressive characteristics of their conversion efficiencies: over 28% in single-junction, and 37.9% in multi-junction device architectures under full illumination.[1]
The cyclization of indolin-2-one 3b with the Lawesson’s reagent (LR) in refluxing toluene led to the formation of the protodebrominated thieno[2,3b]indole 1b, instead of the expected product 2-Br-1b, which can be regarded as the starting material for the synthesis of compounds 1c,d
We have developed new organic dyes of the thieno[2,3-b]indole family, and used them successfully for sensitization of TiO2 films in the dye-sensitized solar cells (DSSCs)
Summary
Photovoltaic devices, based on crystalline, inorganic semiconductors, have reached impressive characteristics of their conversion efficiencies: over 28% in single-junction, and 37.9% in multi-junction device architectures under full illumination.[1]. Push-pull dyes, which are based on electron-rich heterocyclic derivatives, such as carbazole,[13,14] indolo[3,2-b]carbazole,[15] and thieno[3,2-b]indole units,[16] with oligothiophene π-linkers and a 2-cyanoacetic acid fragment, as the acceptor moiety proved to exhibit high PCE values (up to 8.3%).
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