Modeling and interpretation of electrical impedance spectra of dye solar cells operated under open-circuit conditions

Physical electrochemistry of nanostructured devices

“…73 Recently, many studies have determined the properties of DSC using EIS. 40,64,66,[74][75][76][77][78] This technique has the advantage of identifying different types of operational elements, consisting either in electronic or ionic processes, in photoelectrochemical devices.…”

Three-Channel Transmission Line Impedance Model for Mesoscopic Oxide Electrodes Functionalized with a Conductive Coating

“…Usually, in these systems, the electronic communication between the large internal surface covered with optically active molecules and the external contact occurs by electron transport through the assembly of sintered semiconductor nanoparticles. Impedance spectroscopy has proved to be a very useful technique for the characterization of properties of dye solar cells 1,[19][20][21][22] and electrochromic windows. 23 Recently, a new approach has been taken [24][25][26][27][28] toward electric and electrooptic devices formed by molecular functionalized mesoscopic oxides, such as photovoltaic cells, sensors, and Figure 1.…”

Influence of Different Cations of N3 Dyes on Their Photovoltaic Performance and Stability

“…In this sense, the effect of the aging process in the overall performance of device A was analyzed by means of electrochemical impedance spectroscopy. This technique allows us to determine the charge-transfer resistances at the platinum counter-electrode and at the TiO 2 /dye/electrolyte interface as well as to determine the Nernstian diffusion of I − /I − 3 ions within the electrolyte [10,20]. The Bode and Nyquist (Z -imaginary part of impedance versus Z -real part of impedance) plots for the potassium-based system, before and after the aging process, are shown in Figure 4.…”

“…This technique has been widely used for the characterization of several electrochemical systems and, in particular, to analyze internal resistances in the DSCs [10][11][12][13][14][15][16][17][18][19]. In 2000 Bisquert et al applied their models in the analysis of the mechanisms of electron recombination in nanoporous TiO 2 dye-sensitized solar cells [18].…”

“…In 2000 Bisquert et al applied their models in the analysis of the mechanisms of electron recombination in nanoporous TiO 2 dye-sensitized solar cells [18]. After this first approach, EIS became more and more useful, playing a crucial role in what concerns modeling and understanding the complex charge phenomena occurring in DSCs [10][11][12][13][14][15][16][17][18][19]. The charge-transfer resistance at the TCO layer, the charge-transfer resistance at the counterelectrode/electrolyte interface, and the charge-transfer resistance at TiO 2 /dye/electrolyte interface can therefore be obtained by fitting the EIS results to appropriate equivalent electrical circuits [20].…”