Investigations on Electrical Properties of Al₂O₃, ZnO and MgO Doped Ba_0.7Sr_0.3TiO₃ Ceramics Based MIM Capacitor for Energy Storage Application

Abstract

In this paper, the performance parameters, capacitance and leakage current of Al₂O₃, ZnO and MgO doped Ba_0.7Sr_0.3TiO₃ ceramics based metal-insulator-metal (MIM) capacitors are investigated. The specific capacitance of intrinsic Ba_0.7Sr_0.3TiO₃ ceramic based MIM capacitor changes with frequency whereas Al₂O₃ doped Ba_0.7Sr_0.3TiO₃ ceramics based MIM capacitor exhibits almost frequency independent specific capacitance. 2.0 wt% ZnO doped Ba_0.7Sr_0.3TiO₃ ceramics based MIM capacitor exhibits highest specific capacitance. The doping of Ba_0.7Sr_0.3TiO₃ ceramics with ZnO is not sufficient for enhancing leakage current performance. On investigation, 4.0 wt% MgO doped Ba_0.7Sr_0.3TiO₃ ceramics based MIM capacitor is found better for energy storage application.

Keywords:

• Energy storage
• ceramic capacitor
• doping
• specific capacitance
• leakage current

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.