Modeling of an equivalent circuit for dye-sensitized solar cells

Abstract

Internal resistance in a dye-sensitized solar cell (DSC) was investigated using electrochemical impedance spectroscopy measurements. Four resistance elements were observed in the impedance spectra, and their dependencies on the applied bias voltage were characterized. It is found that the resistance element related to charge transport at the TiO2/dye/electrolyte interface displays behavior like that of a diode, and the series resistance elements largely correspond to the sum of the other resistance elements. An equivalent circuit for DSCs is proposed based on these results.

Titanium Dioxide Nanomaterials: Basics and Design, Synthesis and Applications in Solar Energy Utilization Techniques

“…By optimally selecting the photoanode material, dye and electrolyte, the photocurrent density can be improved without significantly lowering the V oc . One approach to increase V oc is to adjust the redox potential to a more positive value (Han et al, 2004), while the dye's ground state potential should be positive enough comparing with the redox potential to make sure the efficient dye regeneration rate. Another approach is to choose a more efficient sensitizer, and then more electrons are injected to the photoanode, raising the Fermi level of the oxide and thus shift its potential.…”

Preliminary study of application of Moringa oleifera resin as polymer electrolyte in DSSC solar cells

“…It was related with conductivity of polymer electrolyte membrane. On the other hand, the low performance of DSSC solar cell may cause of high internal resistance of DSSC solar cells [16][17][18].Based on these result, optimation of Moringaoleifera resin based polymer electrolyte was required. The optimation can be obtained by make doping polymer with other metal particle and deposition methods.…”

Pore size dependence of self-assembled type photonic crystal on dye-sensitized solar cells efficiency utilising Chlorine e6

“…The resistance component of a DSSC consists of two or more factors such as an ITO substrate, dye, TiO 2 and an electrolyte solution. The various applications of electrochemical impedance measurements to DSSCs have been performed and there are also numerous reports of equivalent circuits for the separation of the resistive component [41][42][43]. In this experiment, we used the equivalent circuit reported by Eguchi et al [44], which enables each resistance component of DSSCs to be discussed in detail.…”