Chemically deposited TiO2/CdS bilayer system for photoelectrochemical properties

In the present investigation, Ti02, CdS and Ti02/CdS bilayer system have been deposited on the fluorine doped tin oxide (FTO) coated glass substrate by chemical methods. Nanograined TiO2 was deposited on FTO coated glass substrates by successive ionic layers adsorption and reaction (SILAR) method. Chemical bath deposition (CBD) method was employed to deposit CdS thin film on pre-deposited TiO2 film. A further study has been made for structural, surface morphological, optical and photoelectrochemical (PEC) properties of FTO/Ti02, FTO/CdS and FTO/Ti02/CdS bilayers system. PEC behaviour of FTO/Ti02/CdS bilayers was studied and compared with FTO/CdS single system. FTO/Ti02/CdS bilayers system showed improved performance of PEC properties over individual FTO/CdS thin films.