Abstract
The aim of this research work is presented a comparison study of Cu:ZnO/TiO2/ZnO (Cu:ZTZ) and Cu:TiO2/ZnO/TiO2 (Cu:TZT) thin films deposited by spray pyrolysis technique on FTO substrates. After deposition, these films are annealed at 500°C. XRD confirms the anatase phase of TiO2 and Hexagonal wurtzite phase of ZnO. SEM shows that Cu:TZT has more porous surface than Cu:ZTZ and also the root mean square (RMS) roughness of Cu:TZT film is 48.96 and Cu:ZTZ film is 32.69. The calculated optical band gaps of Cu:TZT and Cu:ZTZ thin films are 2.65eV and 2.6eV respectively, measured by UV–Vis spectrophotometer. This work provides an environment friendly and low cost use of an abundant material for highly efficient dye sensitized solar cells (DSSCs).
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