Building and Testing a Spin Coater for the Deposition of Thin Films on DSSCs

Abstract

A low cost spin coater was constructed in this work for the deposition of thin films of titanium dioxide (TiO 2 ) on conductive substrate of FTO (fluoride doped tin oxide) with application on dye sensitized solar cells. The results showed a 95% precision between the speed values obtained by the software of C#sharp language and the spin values observed directly on the device. The TiO 2 films deposited through the spin coater with different angular speeds were characterized by UV-Vis optical spectrum, scanning electron microscopy (SEM), atomic force microscopy (AFM) and electrical measurements on an active area of 0.25 cm 2 . The DSSCs assembled with the TiO 2 films of double layer deposited by the spin coater had an efficiency value of 12.74%, while the cell with a single layer presented 4.05% efficiency. Therefore, it is concluded that the spin coater assembled in this study at low costs successfully can produce TiO 2 electrodes for DSSCs.

Fabrication of Spin Coater Device using Hematocrit Centrifuge with Vacuum Substrate Holder for Thin Film Deposition

“…Any machine that works with nanoscale dimensions must be designed with high accuracy, so it is necessary to calculate the effects of rotation in this work on the thickness and homogeneity of the film 23 . As well, the spin coating machine needs to be free from the vibration effects to obtain films with high homogeneity, regardless of the number of coating layers.…”

Effect of the Performance of Lignin Into the Matrix of the TiO2 with Application on DSSCs

“…The results indicated that the film with 12.73 μm had better performance of ƞ = 6.07%. In other work, (Teixeira ES et al, 2020) deposited thin films of TiO 2 by spin coating with different thickness (65.90, 90.17, 106.7 μm). The results indicated that the cell assembled with TiO 2 of thickness 65.90 μm presented ƞ = 12.74%.…”