| 초록 |
In the dye-sensitized solar cells (DSSCs) consisting of sensitized TiO2 and redox species in electrolytes, the short circuit current density (JSC) controlled by light harvesting capability and charge injection efficiency of dye, and open circuit voltage (VOC) determined by the difference between conduction band (CB) of TiO2 and potential of redox couple, are strongly governed by interfacial properties of TiO2. Several strategies have been employed to enhance these key parameters such as introduction of inorganic insulation layer to give core-shell structure or organic coadsorbents with dye. Many researchers have focused on the role of coadsorbents such as 3-phenylpropionic acid (PPA), 4-guanidinobutyric acid (GBA). Herein, the effects of coadsorbents, GBA, PPA, and stearic acid (SA) adsorbed with dye on the surface of TiO2 simultaneously on the interfacial phenomena and photovoltaic performance of DSSCs were discussed and systematically organized. |
