通过空腔增强效应和批量异质连接策略来提高MoS2的UV-vs-NIR光检测性能
Xiaolong Li1,2, Jundi Wan1,2, Yulu Tang1,2
1College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
ACS applied materials & interfaces
|May 24, 2024
概括
这项研究通过使用二硫化物纳米管 (MoS2 NTs) 提高光检测器性能,以更好地捕捉光线并创建Y-TiOPc NPs:MoS2 NTs异质连接. 这提高了光子利用和光子检测在可见到近红外波长.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 光电学是指光电子产品.
背景情况:
- 在光电探测器 (PD) 中提高光子利用率对于先进的光学传感至关重要.
- 像二硫化 (MoS2) 这样的二维材料的形态控制显著影响了设备的性能.
- 现有的MoS2光探测器在宽光谱吸收和载波动态方面面临着挑战.
研究的目的:
- 研究MoS2形态对光探测器性能的影响.
- 开发一种新的异质连接光探测器,用于增强可见至近红外光探测.
- 为了提高光子探测器中的光子吸收,载体生成,分离和传输效率.
主要方法:
- 合成和表征MoS2纳米管 (MoS2 NTs) 并将其性能与分层MoS2 (MoS2 NLs) 进行比较.
- 使用Y型甲氨酸纳米颗粒 (Y-TiOPc NPs) 和MoS2 NTs制造了一个异质连接光探测器.
- 使用外部量子效率 (EQE),响应能力 (R) 和检测能力 (D*) 等指标分析设备性能,以及时间分辨率的光电流测量.
主要成果:
- 与MoS2 NLs相比,MoS2 NTs表现出一个空洞增强效应,改善了光检测.
- Y-TiOPc NPs:MoS2 NTs异构连接 (Y:MT-PD) 显示显著增强的吸收和载体动态.
- Y:MT-PD实现了4947.6%的峰值EQE,反应率为20588mA/W,在365-940nm范围内检测能力为1.94×1012斯.
- 卓越的时间分辨率光电流响应表明快速,稳定和可重现的检测.
结论:
- MoS2纳米管为光探测器光子利用提供了一个有希望的结构增强.
- Y-TiOPc NPs:MoS2 NTs异质连接策略有效地扩大了光谱响应,并改善了关键的光检测指标.
- 这项工作为开发具有卓越光子利用效率的高性能光活性材料提供了途径.
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