Effect of adding Ce on the optostructural and electrical properties of cubic CaSnO₃

Abstract

CaSnO₃ and Ce doped CaSnO₃ particles were synthesized by co-precipitation method. An X-ray diffraction study shows that the synthesized CaSnO₃ particles belongs to orthorhombic structure and the crystalline peaks shift toward higher angle with increasing Ce concentration. The Fourier Transform Infrared Spectra witnessed the presence of Ca-O, Sn-O and Ce-O vibrations in the synthesized particles. The optical absorption is higher in the UV-region and the band gap energy is decreased from 4.3 eV to 3.2 eV. The photoluminescence spectra affirmed that the emission peak shifts toward the visible region during the incorporation of Ce. Scanning electron microscope images depicted the cubic block-like morphology with sharp edges. From the electrochemical measurements, 0.02 M Ce doped CaSnO₃ electrode exhibited higher specific capacitance value of 916 F/g due to its lower charge transfer resistance value than that of 0.01 M and 0.03 M Ce doped CaSnO₃.

Graphical Abstract

Keywords:

• Ce doped CaSnO₃
• UV-DRS
• photoluminescence
• specific capacitance
• SEM

Acknowledgement

The author acknowledges his sincere thanks to the University Grants Commission (UGC-SAP) and DST-FIST for providing analytical facilities to the Department of Physics, Manonmaniam Sundaranar University, Tirunelveli. The authors also thank DST-SERB for providing financial support.