Abstract
Three Troger's base scaffold-based metal-free sensitizers TD1, TD2 and TD3 with triphenylamine donor and rhodanine-3-acetic acid as an acceptor/anchoring group were designed and synthesized for dye-sensitized solar cells. The sensitizer series was designed to investigate the influence of the poly[n]enic (from n = 0 to 2) backbones and their anchoring effect in DSSCs. Optical, electrochemical and photovoltaic properties were compared with analogues dyes D1-D3 possessing one anchoring group. It has been proven that the extended polymethine chains ensure flexibility of these units and inspire the interaction between two chromophores promoting aggregate formation in these Troger's base-based dyes.
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