文章基本信息

标题：Large energy storage density performance of epitaxial BCT/BZT heterostructures via interface engineering
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作者：Amrit P. Sharma ; Dhiren K. Pradhan ; Sangram K. Pradhan 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2019
卷号：9
期号：1
页码：1-8
DOI：10.1038/s41598-019-53358-0
出版社：Springer Nature
摘要：We grew lead-free BaZr 0.2 Ti 0.8 O 3 (BZT)/Ba 0.7 Ca 0.3 TiO 3 (BCT) epitaxial heterostructures and studied their structural, dielectric, ferroelectric and energy density characteristics. The BZT/BCT epitaxial heterostructures were grown on SrRuO 3 (SRO) buffered SrTiO 3 (STO) single crystal substrate by optimized pulsed laser deposition (PLD) technique. These high-quality nanostructures exhibit high dielectric permittivity (∼1300), slim electric field-dependent polarization (P-E) curve with high saturation polarization (∼100 µC/cm 2 ) and low remnant polarization (∼20 µC/cm 2 ) through interface engineering to develop new lead-free ferroelectric system for energy storage devices. We observe an ultrahigh discharge and charge energy densities of 42.10 and 97.13 J/cm 3 , respectively, with high efficiency, which might be highly promising for both high power and energy storage electrical devices.