University Publications

A new double perovskite compounds CaLaMnTiO6, CaLaMn0.67Fe0.33TiO6 and CaLaMn0.33Fe0.67TiO6 were prepared successfully using solid state reaction method to provide a solar cell. The X ray diffraction XRD, UV- visible spectroscopies were used to characterize the structural and optical properties of the synthesized compound. From X ray powder diffraction (XRD) examination, the samples show variation in structure from monoclinic structure with (P21/n) for CaLaMnTiO6 up to a cubic structure with (Pm-3m) space group for CaLaMn0.67Fe0.33TiO6 and CaLaMn0.33Fe0.67TiO6, and the lattice parameters were investigated and found to be a =5.47953 Å, b = 5.54992 Å, c = 7.76430 Å for CaLaMnTiO6, and a =3.9471, 3.868Å for CaLaMn0.67Fe0.33TiO6 and CaLaMn0.33Fe0.67TiO6 respectively, where this varied result comes from the cation size disorder. The band gap energy was calculated; and found to be decreased from 5 to 3.6 eV for the series. The efficiency of the solar panel was measured via the current-voltage (I-V) characteristic curve, and the results were observed. The efficiency of the three samples was decreased from η = 1.18, 0.42 and 0.32 % for CaLaMnTiO6, CaLaMn0.67Fe0.33TiO6 and CaLaMn0.33Fe0.67TiO6 respectively.