Wide frequency range diagnostic impedance behavior of the multiple interfaces charge transport and transfer processes in dye-sensitized solar cells

Computational Analysis of the Optical and Charge Transport Properties of Ultrasonic Spray Pyrolysis-Grown Zinc Oxide/Graphene Hybrid Structures

“…1d shows a high-density ZnO NW-like structure with obviously fine diameters. Here, the nanostructure densities were determined as an average weight percent of ZnO nanostructures [ 23 , 24 ] through five EDS scans performed at five different locations in the samples. Whereas, the nanostructure size was determined by calculating the average diameter of a circle that was a tangent to the outer profile of the nanostructures using three FESEM images taken at five different locations in the sample.…”

“…As shown in Fig. 4a , the ZnO NW-based structure contains excessive amount of O atoms (red spheres) in its lattice as compared to the perfect wurtzite structure [ 24 ]. It can be seen that the side Zn atom (green spheres) at the ZnO branch is covalently bonded to three extra O atoms with single bond (denoted by dashed circle).…”

“…At middle range of frequency, the electrons tend to transfer at the ZnO/electrolyte interface via semi-infinite length diffusion (represented by capacitance C 1 and resistance R 1 as shown in Fig. 8 c [ 23 , 24 ]). The calculated lifetime of electron through the ZnO structure is found to be 265 ms at f c2 [ 30 , 31 ].…”

Improving photoelectrochemical performance of highly-ordered TiO2 nanotube arrays with cosensitization of PbS and CdS quantum dots

“…31 The lowfrequency peak (in the mHz range) corresponds to the Nernstian diffusion within the electrolyte, the middle-frequency peak (in the 1-100 Hz range) reects the electron transfer in the photoanode and charge reaction at the photoanode/electrolyte interface, and the high-frequency peak (in the kHz range) corresponds to the charge-transfer at the counter electrode. 31,32 In Fig. 9a, the low-frequency peak cannot be clearly distinguished since it vanishes underneath the middle-frequency peak due to the low resistance of the electrolyte.…”

How Reproducible are Electrochemical Impedance Spectroscopic Data for Dye-Sensitized Solar Cells?

“…This allows for a more precise explanation about the limiting factors of the DSC performance. Many studies have been reported in order to investigate the correct interpretation of EIS results [12][13][14][15][16][17].…”