Abstract
Abstract The π-conjugated donor-acceptor stilbenoid dendrimers are successfully synthesized in high yields by either Aldol-type condensation or Wittig reaction with triphenylamine as donor and benzothiazole as acceptor. The molar extinction coefficient increases with increase in the number of the conjugated π-bridges. All the stilbenoid dendrimers exhibit quasi-reversible oxidation reduction signal in cyclic voltammetry. The highly π-conjugated stilbenoid dendrimers exhibit better current generating capacity and light energy harvesting efficiency than the other dendrimers, when used as additives in dye-sensitized solar cells. Stilbenoid dendrimer 7 shows the maximum power conversion efficiency (ɳ) of 5.08%.
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