基于元素铁电黑的光电探测器 - - 类似于比斯的比斯
Qiang Li1, Shibo Fang2, Xingyue Yang2
1Department of Physics, Hubei Minzu University, Enshi 445000, P. R. China.
ACS applied materials & interfaces
|November 6, 2024
概括
单层黑类比斯 (BP-Bi) 呈现出显著的光效应 (PGE). 这种元素铁电材料在扶手椅方向显示的光电流要高得多,而不是齐克扎克方向,对光电探测器应用有前途.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
背景情况:
- 由于其光效应 (PGE) 和光物质相互作用,二维铁电材料是下一代光探测器的关键.
- 最近合成的黑类比斯穆特 (BP-Bi),一种元素铁电材料,为研究开辟了新的途径.
研究的目的:
- 在单层 (ML) BP-Bi.Bi.中研究光效应 (PGE).
- 为了理解这个新的二维铁电材料中的异构光电流生成.
主要方法:
- 使用ab initio量子传输模拟来研究MLBP-Bi.Bi中的PGE.
- 分析了沿着不同的晶体学方向 (扶手椅和齐克扎克) 的光电流生成.
主要成果:
- 单层BP-Bi在扶手椅 (ARM) 方向上的光电流明显高,而不是齐克扎克 (ZZ) 方向.
- 在ARM方向 (133 mA/W) 的最大光电流是两个数量级大于在ZZ方向 (4.70 mA/W),尽管可比的光学吸收.
- 这种光流不对称性归因于沿着ARM和ZZ方向的明显的镜像反转对称性.
结论:
- 单层BP-Bi表现出强大的异性质光电流产生,这是由于其铁电特性所驱动的.
- 这些发现突显了ML BP-Bi在开发高性能,低尺寸铁电光探测器方面的潜力.
- 这项研究为探索光电子设备中的新二维铁电材料提供了基础.
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