| 초록 |
Dye-sensitized solar cells (DSSCs) have been widely regarded as next-generation photovoltaics for providing electricity at lower expense and with more versatility. Porphyrins are one of the most widely studied sensitizers for DSSCs because of their strongly absorbing Soret bands (400-450 nm) and moderately absorbing Q bands (550-600 nm). New alkynyl-substituted D-π-A zinc-porphyrin sensitizers were designed and synthesized with the combination of the bulky triphenylamine (TPA) derivatives as the donor group, such as dihexyloxy-substituted TPA moiety and bis(2,4-dihexyloxy)phenyl-substituted TPA moiety, double alkynyl-substituted zinc-porphyrin as the π-bridge unit and benzothiadiazole (BTD)-based phenyl derivative as the acceptor group. Porphyrin with doubly alkynyl sustituent was introduced as the π-bridge unit in order to red-shift the Soret and Q bands with respect to single alkynyl-substituted porphyrin sensitizer. In this study, their structure-performance relationships were investigated with the influence of the various donor moieties and BTD-based derivative on the photophysical, electrochemical and photovoltaic properties. |
