Structural, Optical, and Electrical Properties of Undoped and Zn-Doped CaSnO3 Nanoparticles Synthesized by the Co-Precipitation Method

Abstract

In this work, we studied the optical properties of undoped and Zn-doped CaSnO₃ nanoparticles.  XRD patterns revealed the formation of the orthorhombic CaSnO₃ structure, with a pronounced shift for doped samples. Fourier-transform infrared spectroscopy identified the presence of Ca-O and Sn-O vibrations. The bandgap of CaSnO3 was found to be 4.5 eV, with variations observed upon doping. Scanning electron microscopy images showed a polygonal morphology with size variations. In Zn doped Zn-doped CaSnO₃, PL spectra showed a peak shift towards the visible region compared to the undoped sample. Among the Zn concentrations, 0.02M Zn-doped CaSnO₃ exhibited specific capacitance of 2880 F/g, as measured from the CV curve.