Improvement of efficiency of dye-sensitized solar cells based on analysis of equivalent circuit

摘要: Abstract The present paper discusses the principle of dye-sensitized solar cells (DSCs) in terms a new physics-based equivalent circuit model. This model is proposed following analysis by electrochemical impedance spectroscopy voltage dependence internal resistance elements DSCs. influence these upon cell performance areas such as short current density (JSC), open (VOC) and fill factor (FF) was examined based on circuit. It demonstrated that haze TiO2 electrodes useful index when fabricating light-confined to improve JSC, blocking surface with molecules an effective way reducing interfacial charge recombination at improving shunt VOC. FF also improved reduction series resistance, which composed three elements: redox reaction platinum counter electrode, carrier transport ions electrolyte, due sheet transparent conducting oxide. Finally, highest efficiency scores 10.4% 10.8% (aperture illumination area 1.004 cm2 0.2227 cm2, respectively) were confirmed public test center.