Abstract
In this paper, the performance parameters, capacitance and leakage current of Al2O3, ZnO and MgO doped Ba0.7Sr0.3TiO3 ceramics based metal-insulator-metal (MIM) capacitors are investigated. The specific capacitance of intrinsic Ba0.7Sr0.3TiO3 ceramic based MIM capacitor changes with frequency whereas Al2O3 doped Ba0.7Sr0.3TiO3 ceramics based MIM capacitor exhibits almost frequency independent specific capacitance. 2.0 wt% ZnO doped Ba0.7Sr0.3TiO3 ceramics based MIM capacitor exhibits highest specific capacitance. The doping of Ba0.7Sr0.3TiO3 ceramics with ZnO is not sufficient for enhancing leakage current performance. On investigation, 4.0 wt% MgO doped Ba0.7Sr0.3TiO3 ceramics based MIM capacitor is found better for energy storage application.
Acknowledgments
The authors are grateful to Dr. Surendran K.P. and his research team from Electronic Materials Lab, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, Kerala for their support in carry out experiments.