| | | | | | | |
                
Indian Science Technology and Engineering facilities Map
Supplier Map
Service Map










Publications

Publication Details

Applicant:
Central University of Tamil Nadu 
Author:
José P. B. Silva, João M. B. Silva, Marcelo J. S. Oliveira, Tobias Weingärtner, Koppole C. Sekhar, Mário Pereira, Maria J. M. Gomes 
Corresponding Authors:
José P. B. Silva, Koppole C. Sekhar 
DOI #:
https://doi.org/10.1002/adfm.201807196 
Title:
High‐Performance Ferroelectric–Dielectric Multilayered Thin Films for Energy Storage Capacitors 
Journal:
Advanced Functional Materials 
Year:
2019 
Volume:
29 
Page:
1807196 
Keywords:
Charge coupling effect, dielectric capacitors, energy efficiency, energy storage density, ferroelectric–dielectric structures 
Abstract:
Herein, the effect of the insertion of a thin dielectric HfO2:Al2O3 (HAO) layer at different positions in the Pt/0.5Ba(Zr0.2Ti0.8)O3–0.5(Ba0.7Ca0.3)TiO3 (BCZT)/Au structure on the energy storage performance of the capacitors is investigated. A high storage performance is achieved through the insertion of a HAO layer between BCZT and Au layers. The insertion of the dielectric layer causes a depolarization field which results in a high linearity hysteresis loop with low energy dissipation. The Pt/BCZT/HAO/Au capacitors show an impressive energy storage density of 99.8 J cm−3 and efficiency of 71.0%, at an applied electric field of 750 kV cm−1. Further, no significant change in the energy storage properties is observed after passing 108 switching cycles through the capacitor. The presence of resistive switching (RS) in leakage current characteristics confirms the strong charge coupling between ferroelectric and insulator layers. The same trend of the RS ratio and the energy storage performance with the variation of the architecture of the devices suggests that the energy storage properties can be improved through the charge coupling between the layers. By combining ferroelectrics and dielectrics into one single structure, the proposed strategy provides an efficient way for developing highly efficient energy storage capacitors. 
Entered by:
Koppole Chandra Sekhar on 2020-09-02 
 
THE VISION
THE MISSION
ABOUT I-STEM
It has always been the basic tenet of the Government of India, in generously funding R&D efforts at academic institutions over the years, that facilities established through such support be made available to those needing them and qualified to make use of them for their own research work
read more >>

However, this was never easy or straightforward for, among other reasons, there was no ready source of information of what facility was available and where. Thanks to the Web, it is much easier today to have a national and regional “inventory of resources”, so as to match users with the resources they need, and to do all this in an efficient and transparent manner.

This can lead to a leap in R&D productivity and greatly enhance the effectiveness of public investment. This is the motivation behind I-STEM.
read less <<
Visitor Hit Counter
Toll Free Number : 1800 425 3281
Hosted at Indian Institute of Science
Copyright © 2019 I-STEM. All rights reserved    Audited by: STQC Bengaluru.