高灵敏的异质连接门式光电晶体管,检测波长在350至1700纳米之间
Hongkun Duan1,2, Wenyu Zhang3, Tao Luo4
1School of Integrated Circuits, Beijing University of Posts and Telecommunications, Beijing, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|January 12, 2026
概括
这项研究开发了高度敏感的宽带光学探测器,使用硫化物合体量子点在异质连接门的场效应晶体管中. 这些设备实现了从紫外线到短波红外光到1700nm的敏感检测.
科学领域:
- 光电学是指光电子产品.
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 在UV,可见光和短波红外 (SWIR) 光谱中灵敏的光检测对于监控,遥感和检查至关重要.
- 目前的光电探测器面临带宽和暗噪声方面的挑战,限制了它们与传统或低维材料的性能.
研究的目的:
- 为了扩大异质连接门式场效应晶体管 (HGFET) 光电晶体管的SWIR检测极限,超出1400 nm.
- 为了提高光探测器的灵敏度,并减少宽带应用的暗噪声.
主要方法:
- 优化硫化 (PbS) 体量子点 (CQD) 通过将平均直径增加到6.0 nm,以提高1700 nm的吸收.
- 采用混合连接体被动化策略,以抑制非极面上的缺陷状态,改善异极连接光伏.
- 使用优化的PbS CQDs制造的HGFET光晶体管.
主要成果:
- 从350nm到1700nm实现了宽带辐射检测.
- 证明室温检测能力高达5.7 × 10^13厘米Hz^1/2 W^-1.
- 在1650nm记录了6.4nWcm^-2的最小可检测功率密度.
结论:
- 混合被动化的CQD HGFET为下一代高度敏感的宽带光检测器提供了一条道路.
- 开发的技术将SWIR检测能力扩展到1700 nm以外.
- 这一进步支持需要在UV到SWIR光谱中进行敏感检测的应用.
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