Electrochemical preparation method of titanium dioxide on FTO

Abstract

Cathodic electrodeposition of aqueous peroxo-titanium complex solution on fluorine doped tin dioxide (FTO) covered glass produced nanocrystalline amorphous and crystalline titanium dioxide. X-rays were used to examine the surface structures, which shows that heat treatment made a gradual crystallization of the deposits to the anatase form meanwhile the non-heated deposits present amorphous phase. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) and atomic force microscopy (AFM) permit to investigate the morphological aspect of the deposits, which display a good adherence and a nanoparticulate grain size. The UV-Visible spectroscopic investigation technique reveals the better transparency aspect of the annealed films than the non-heated deposits. Ac impedance spectroscopy confirms the electrical conductivity of both deposits with more important activity for the non-heated deposits.

Enhanced resistance to degradation in sprayed perovskite CH3NH3PbI3 induced by the temperature

“…SEM images of Perovskite distinguished spherical morphology and confirms the formation of particulate and porous films. The as deposited film was quite homogenous, it indicates clearly the particles to be roughly spherical and it shows areas richer in crystallites [27]. 315 While all agglomerations are eliminated at a deposition temperature of 100°C.…”