Ultrasensitive Solar‐Blind Ultraviolet Photodetector Based on FePSe3/MoS2 Heterostructure Response to 10.6 µm
Source abstract
Abstract
Abstract Metal phosphorous tri‐chalcogenides are a category of new ternary 2D layered materials with a wide range of tuneable bandgaps (1.2–3.5 eV). These wide‐bandgap semiconductors exhibit great potential applications in solar‐blind ultraviolet (SBUV) photodetection. However, these 2D solar‐blind photodetectors suffer from low photoresponsivity, slow photoresponse speed, and narrow operation spectral region, thereby limiting their practical applications. Here, an ultra‐broadband photodetection based on a FePSe3/MoS2 heterostructure with coverage ranging from solar‐blind ultraviolet 265 nm to longwave infrared (LWIR) 10.6 µm is reported. Notably, the device exhibits excellent weak light detection capability. A high photoresponsivity of 33 600 A W−1 and an external quantum efficiency of 1.57 × 107% are demonstrated. A noise‐equivalent power as low as 5.7 × 10–16 W Hz−1/2 and a specific detectivity up to 1.51 × 1013 cm Hz1/2 W−1 are realized in the SBUV region. The room temperature LWIR photoresponsivity of 0.12 A W−1 is realized. This work opens a route to design high‐performance SBUV photodetectors and wide spectral photoresponse applications.
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Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · 2D Materials and Applications · Ga2O3 and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Information Materials and Intelligent Sensing Laboratory of Anhui Province Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education Institutes of Physical Science and Information Technology Anhui University 111 Jiu Long Road Hefei 230601 China
Infrared and Low‐Temperature Plasma Key Laboratory of Anhui Province State Key Laboratory of Pulsed Power Laser Technology NUDT 460 Huangshan Road Hefei 230037 China
State Key Laboratory of Infrared Physics Shanghai Institute of Technical Physics Chinese Academy of Sciences 500 Yu Tian Road Shanghai 200083 China
State Key Laboratory of Luminescence and Applications Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences 3888 Dongnanhu Road Changchun 130033 China
Institut für Festkörperphysik Leibniz Universität Hannover Appelstraße 2 30167 Hannover Germany
Funding
National Natural Science Foundation of China
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