通过构建Schottky接触,提高基于BCZT的电容器的储能性能
Zixiong Sun1,2, Haoyang Xin1, Liming Diwu1
1School of Electronic Information and Artificial Intelligence, Shaanxi University of Science and Technology, Xi'an 710021, P. R. China. sunzx@sust.edu.cn.
Materials horizons
|January 10, 2025
概括
这项研究增强了酸酸酸 (BCZT) 薄膜的能量储存,通过战略性地将它们与缺氧的BCZT分层. 这种新的方法,利用Schottky屏障,显著提高了先进电子设备的能量密度和效率.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 薄膜技术 薄膜技术
背景情况:
- 传统的储能电容依赖于材料的组成或结构.
- 设计高性能介电薄膜用于储能需要创新的策略.
- 酸酸酸酸 (BCZT) 是用于介电应用的一个有前途的材料.
研究的目的:
- 研究层次序和周期性对BCZT/BCZT-OD多层薄膜储能性能的影响.
- 探索在基板和介电层之间的接口上形成的肖特基屏障的作用.
- 为了优化薄膜电容器的可回收能量密度和效率.
主要方法:
- 在NSTO基板上使用脉冲激光沉积 (PLD) 制造多层薄膜.
- 分析电场再分配及其对断裂强度的影响.
- 数学建模和有限元模拟以了解极化机制.
- 制造的薄膜的结构特征和性能评估.
主要成果:
- 在NSTO/BCZT-OD接口上形成的Schottky屏障导致了电场再分配.
- 这种重新分配增强了BCZT层的分解强度.
- 与其他序列相比,BCZT-OD启动的多层显示出优异的二极极极化.
- 实现了创纪录的可回收能量密度 (Wrec) 150.22 J cm-3和能源效率 (η) 83.07%.
结论:
- 介电层和缺氧层的战略布局,加上斯科特基屏障效应,对于高能储存至关重要.
- 这种方法为设计下一代高性能电子设备提供了一个新的范式.
- 这些发现显示了薄膜电容技术的重大进步.
更多相关视频
相关概念视频
MOS Capacitor
699
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
699
Schottky Barrier Diode
292
Schottky barrier diodes are specialized semiconductor devices characterized by their unique construction. This construction involves combining a metal layer with a moderately doped n-type semiconductor material. This combination leads to the formation of a Schottky barrier, a pivotal element that defines the diode's operational characteristics. The core functionality of Schottky barrier diodes is their capacity to allow current to flow in only one direction due to their distinctive...
292
Metal-Semiconductor Junctions
291
The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
291
Capacitor With A Dielectric
3.9K
Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
3.9K
Energy Stored in a Capacitor
3.6K
When an archer pulls the string in a bow, he saves the work done in the form of elastic potential energy. When he releases the string, the potential energy is released as kinetic energy of the arrow. A capacitor works on the same principle in which the work done is saved as electric potential energy. The potential energy (UC) could be calculated by measuring the work done (W) to charge the capacitor.
3.6K
Biasing of Metal-Semiconductor Junctions
209
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
209


