范德瓦尔斯斯科特基交叉点光探测器具有超高的校正比率和可切换的光电流生成
Jing-Yuan Wu1, Hai-Yang Jiang1, Zhao-Yang Wen1
1Department of Optoelectronic Science and Engineering, College of Science, Donghua University, Shanghai 201620, China.
ACS applied materials & interfaces
|June 15, 2024
概括
研究人员使用石墨烯/MoS2/PtSe2.2开发了先进的2D Schottky连接光探测器. 这些设备实现了自动供电光检测和光学传感的高性能,克服了以前的局限性.
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
- 纳米技术纳米技术
背景情况:
- 金属半导体接口对于电子和光电子设备至关重要.
- 使用2D材料的Schottky交叉点光探测器提供自动供电的操作,具有快速响应和高信号噪声比.
- 由于费米水平钉定性能极限,无法控制的肖特基屏障.
研究的目的:
- 实现所有二维的肖特基交叉点,并具有近乎理想的费米水平定义.
- 展示基于2D异构结构的高性能不对称二极管和光探测器.
- 为了研究光电流的产生机制和设备的性能.
主要方法:
- 使用多层石墨烯/MoS2/PtSe2异构结构制造所有2D Schottky连接点.
- 设备性能的表征,包括当前纠正比率和理想性因子.
- 扫描光流映射以分析光流生成机制.
主要成果:
- 由于高质量的2D接口,实现了近乎理想的费米水平的定义.
- 已证明的不对称二极管的整正比>10^5和理想系数为1.2.
- 观察到光电流产生的切换从光伏到光效应与不同的排水偏差.
- 自动供电的光电探测器,响应时间<100μs (光伏模式).
- 由于高光增益,高响应率高达460A/W (摄影模式).
- 在高对比度光检测的单像素成像中成功应用.
结论:
- 在所有2D Schottky交叉点的高质量接口使费米水平定义成为可能.
- 石墨烯/MoS2/PtSe2异构结构作为能量转换和光学传感的多功能设备.
- 开发的光电探测器对自动供电的光电探测和成像应用具有出色的性能.
- 这项工作推动了高性能2D Schottky连接光探测器的开发.
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