在BiFeO3薄膜中可切换光电流方向的起源
Yaqiong Wang1,2,3, Matyas Daboczi4,5, Man Zhang2
1Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Sciences, Health Science Centre, Xi'an Jiaotong University, Xi'an, 710061, China.
Materials horizons
|October 23, 2023
概括
观察到可切换的光电流在比斯铁 (BiFeO3) 薄膜中. 外部偏差可以控制阳极和阴极行为,从而使光电子中的应用成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 摄影化学的使用.
背景情况:
- 木铁矿 (BiFeO3) 是一种带间隙间接矿,具有潜在的光活性特性.
- 控制光活性材料中的载体动态对于先进的电子设备至关重要.
研究的目的:
- 为了研究BiFeO3薄膜中的可切换光电流.
- 了解底层带结构及其对光响应的影响.
- 通过外部偏差来证明对n型和p型行为的控制.
主要方法:
- 制造BiFeO3光活性薄膜.
- 测量外部偏移驱动的光电流 (阳极和阴极).
- 环境光辐射光谱和凯尔文探针技术来确定带结构.
- 平带电位的光化学测定.
主要成果:
- 在BiFeO3薄膜中,可以显示可切换的阳极和阴极光电流.
- 费米电平被发现在 -4.96 eV,中间间隙在 -4.93 eV.
- 平带电位被确定为 -4.8 eV与真空相比.
- 外部偏差使n型和p型半导体之间的切换成为可能.
结论:
- 在BiFeO3中带的位置促进可控制的带曲.
- 外部偏差允许对大多数航母类型进行动态控制.
- 这种控制开启了光电子开关和能量转换装置的应用.
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