LSCO/NBT/LSCO异质结铁电储能性能
Ferroelectric Energy Storage Properties of LSCO/NBT/LSCO Heterostructure
摘要: 采用磁控溅射法和脉冲激光沉积法，以钛酸锶(001)SrTiO3(STO)单晶基片为衬底，制备了La0.5Sr0.5CoO3/ Na0.5Bi0.5TiO3/La0.5Sr0.5CoO3(LSCO/NBT/LSCO)铁电电介质电容器，X射线衍射证实了[001]NBT// [001]LSCO//[001]STO外延关系。外延NBT薄膜电容器的有效储能密度Wrec随外加电场的增加呈线性增大规律，在1250 kV/cm时，Wrec达到了25.7 J/cm3，转化效率η为64.7%。此外，在室温到120℃的温度范围内，Wrec和η都具有较好的热稳定性。大的Wrec和热稳定性归因于外延NBT薄膜中较少的缺陷和晶界。
Abstract: La0.5Sr0.5CoO3/ Na0.5Bi0.5TiO3/La0.5Sr0.5CoO3(LSCO/NBT/LSCO) ferroelectric capacitors were fabricated on strontium titanate (001)SrTiO3(STO) single crystal substrates by magnetron sputtering and pulsed laser deposition. The epitaxial relationship of [001]NBT//[001]LSCO/[001] STO was confirmed by X-ray diffraction. The effective energy storage density wrec of epitaxial NBT film capacitor increases linearly with the increase of applied electric field. At 1250 kV/cm, wrec reaches 25.7 J/cm3, and the conversion efficiency is high η 64.7%. In addition, in the temperature range from room temperature to 120˚C, Wrec and η all have good thermal stability. The larger Wrec and thermal stability are attributed to fewer defects and grain boundaries in the epitaxial NBT films.
文章引用：李紫硕, 翟亚欣, 范佳荫, 王晓丹, 丁逸, 贾明浩, 董磊, 宋建民. LSCO/NBT/LSCO异质结铁电储能性能[J]. 纳米技术, 2021, 11(3): 54-58. https://doi.org/10.12677/NAT.2021.113007

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