Fast Switching of Bolometric and Self-Powered Effects in 2H-NbSe2 for High-Efficiency Low-Energy Photon Harvesting,Advanced Optical Materials

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Fast Switching of Bolometric and Self-Powered Effects in 2H-NbSe2 for High-Efficiency Low-Energy Photon Harvesting
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2023-03-27 , DOI: 10.1002/adom.202300074
Mengjie Jiang _{1,

2} , Huaizhong Xing ₁ , Libo Zhang _{2,

3} , Li Han _{2,

3} , Kaixuan Zhang _{1,

2} , Chenyu Yao ₂ , Dong Wang ₂ , Xiaodong Wang ₄ , Shiqi Lan _{1,

2} , Xuyang Lv _{1,

2} , Lin Wang _{1,

2}

Affiliation

The high-performance detector that operates at the low-photon-energy range (≈meV) of the electromagnetic spectrum at room temperature remains in urgent demand for application in a variety of important sectors, including 6G communications, security, sensing, medicine, space science, etc. The vast range of 2D-layered nanomaterials and their distinct layer structures provide an ideal foundation for the manufacture of sophisticated photodetectors and detectors with convenient fabrication methods. In this paper, the direct detection of terahertz waveband dominated by the bolometer effect and photo-thermoelectric effect is demonstrated, which is endowed with a versatile integration of 2H-NbSe₂ in terms of planar and vertical van der Waals structures. This 2H-NbSe₂-based device can detect broadband long wavelength due to the bolometer effect, and the van der Waals heterostructure-based device exhibits excellent sensitivity and self-powered photo-thermoelectric conversion with high responsivity (>735 V W⁻¹), low response time (<1 µs), as well as low noise equivalent power (NEP < 50 pW Hz^−0.5) at room temperature. The photodetector engineers versatile detection mechanisms, displaying low-energy photons on the hybrid integration of novel low-dimensional materials and providing an opportunity for the practical application of energy harvesting.

中文翻译：

2H-NbSe2 中辐射热效应和自供电效应的快速切换，用于高效低能光子收集

在室温下工作在电磁波谱的低光子能量范围 (≈meV) 的高性能探测器仍然迫切需要在各种重要领域应用，包括 6G 通信、安全、传感、医学、空间科学等。范围广泛的二维层状纳米材料及其独特的层结构为使用方便的制造方法制造复杂的光电探测器和探测器提供了理想的基础。本文展示了直接探测由辐射热计效应和光热电效应主导的太赫兹波段，这赋予了 2H-NbSe ₂在平面和垂直范德华结构方面的多功能集成。这 2H-NbSe ₂基于辐射热计效应的器件可以检测宽带长波长，基于范德瓦尔斯异质结构的器件具有出色的灵敏度和自供电光热电转换，具有高响应率（>735 VW -1 ）、低响应时间^（ < 1 µs)，以及室温下的低噪声等效功率 (NEP < 50 pW Hz ^{−0.5 )。}光电探测器设计了多种检测机制，在新型低维材料的混合集成上显示低能光子，并为能量收集的实际应用提供了机会。

更新日期：2023-03-27

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