Characteristics of TiO2 Compact Layer prepared for DSSC application

Abstract

Dye-sensitized solar cells (DSSCs) offer an economically reliable and suitable alternative in moderating the challenges presented by the existing convectional photovoltaic cells. However, the efficiency of dye-sensitized solar cells has remained relatively low. For this reason, this research was aimed at studying the characteristics of TiO 2 compact layer that can be applied in DSSCs as a way of improving efficiency. To achieve this, TiO 2 compact layer was deposited on a conductive glass substrate by using Holmarc's Spray Pyrolysis system, using Ultrasonic Spray Head and spraying in the vertical geometry. X-ray Diffraction studies revealed that TiO 2 compact layer was of anatase phase and had tetragonal crystalline structure. Raman spectroscopy showed that the most intense peak appeared at 142 cm-1 due to the external vibration of the anatase structure. Hall Effect studies revealed that TiO 2 compact layer has a high density of charge carriers' value of 1.25 × 1019 cm-3 hence it can be used in DSSC applications.

Enhanced performance by heteroatom‐doped reduced grapheneoxide‐TiO2‐based nanocomposites as photoanodes in dye‐sensitised solar cells

“…These charge carrier characteristics are due to changes in the electronic structure of GO as a result of heteroatom‐doping and incorporation of TiO 2 . The resistivity value of pure TiO 2 was 1.79 × 10 −3 Ω cm, which agrees with literature values 66,67 . All nanocomposites exhibited a lower resistivity value compared with pure TiO 2 .…”

“…The resistivity value of pure TiO 2 was 1.79 Â 10 À3 Ω cm, which agrees with literature values. 66,67 All nanocomposites exhibited a lower resistivity value compared with pure TiO 2 . This was attributed to the presence of electrically conductive graphene-based materials in the nanocomposites and suggests that these nanocomposites are a promising material for application in DSSCs.…”

Electron Conduction Channel of Silver Nanowire Modified TiO₂ Photoanode for Improvement of Interface Impedance of Dye-Sensitized Solar Cell

“…Regarding the standard photoanodes of pure TiO2 nanoparticles, the boundaries of particles or crystallites can increase the possibility to reorganize the charge of dye molecules and ions in a redox pair [10]- [13]. Therefore, the output current density is very low.…”