journal article·2019-02-06Open access

Palladium Diselenide Long-Wavelength Infrared Photodetector with High Sensitivity and Stability

Mingsheng Long, Yang Wang, Peng Wang, Xiaohao Zhou, Hui Xia, Chen Luo, Shenyang Huang, Guowei Zhang, Hugen Yan, Zhiyong Fan, Xing Wu, Xiaoshuang Chen, Wei Lu, Weida Hu

Abstract

A long-wavelength infrared photodetector based on two-dimensional materials working at room temperature would have wide applications in many aspects in remote sensing, thermal imaging, biomedical optics, and medical imaging. However, sub-bandgap light detection in graphene and black phosphorus has been a long-standing scientific challenge because of their low photoresponsivity, instability in the air, and high dark current. In this study, we report a highly sensitive, air-stable, and operable long-wavelength infrared photodetector at room temperature based on PdSe2 phototransistors and their heterostructure. A high photoresponsivity of ∼42.1 AW–1 (at 10.6 μm) was demonstrated, which is an order of magnitude higher than the current record of platinum diselenide. Moreover, the dark current and noise power density were suppressed effectively by fabricating a van der Waals heterostructure. This work fundamentally contributes to establishing long-wavelength infrared detection by PdSe2 at the forefront of long-IR two-dimensional-materials-based photonics.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: 2D Materials and Applications · Nanowire Synthesis and Applications · Perovskite Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yu Tian Road, Shanghai 200083, China

University of Chinese Academy of Sciences, 19 Yu Quan Road, Beijing 100049, China

Shanghai Key Laboratory of Multidimensional Information Processing, Department of Electronic Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China

Department of Physics, State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Fudan University, 220 Han Dan Road, Shanghai 200433, China

Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong China SAR

Funding

Natural Science Foundation of Shanghai · National Natural Science Foundation of China · Chinese Academy of Sciences · Shanghai Institute of Technical Physics

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