首页|High performance photodetector based on few-layer MoTe2/CdS0.42Seo.58 flake heterojunction

High performance photodetector based on few-layer MoTe2/CdS0.42Seo.58 flake heterojunction

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Two-dimensional(2D)transition metal dichalcogenides have been exten-sively studied due to their fascinating physical properties for constructing high-performance photodetectors.However,their relatively low respon-sivities,current on/off ratios and response speeds have hindered their widespread application.Herein,we fabricated a high-performance photodetector based on few-layer MoTe2 and CdS0.42Se0.58 flake hetero-junctions.The photodetector exhibited a high responsivity of 7221 A/W,a large current on/off ratio of 1.73×104,a fast response speed of 90/120 μs,external quantum efficiency(EQE)reaching up to 1.52×106％and detec-tivity(D*)reaching up to 1.67×1015 Jones.The excellent performance of the heterojunction photodetector was analyzed by a photocurrent mapping test and first-principle calculations.Notably,the visible light imaging function was successfully attained on the MoTe2/CdS0.42Se0.58 photodetectors,indicating that the device had practical imaging application prospects.Our findings provide a reference for the design of ultrahigh-performance MoTe2-based photodetectors.

photodetectorMoTe2heterojunctionvisible light imagingfirst-principles calculations

Ran Ma、Qiuhong Tan、Peizhi Yang、Yingkai Liu、Qianjin Wang

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College of Physics and Electronic Information,Yunnan Normal University,Kunming 650500,China

Yunnan Provincial Key Laboratory for Photoelectric Information Technology,Yunnan Normal University,Kunming 650500,China

Key Laboratory of Advanced Technique & Preparation for Renewable Energy Materials,Ministry of Education,Yunnan Normal University,Kunming 650500,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaBasic Research Program of Yunnan ProvinceBasic Research Program of Yunnan ProvinceSpring City Plan(Highlevel Talent Promotion and Training Project of Kunming)Yunnan Expert Workstation

1186404611764046202001AT070064202101AT0701242022SCP005202205AF150008

2024

10.1007/s11467-023-1374-3

物理学前沿
高等教育出版社

物理学前沿

CSTPCD
影响因子：0.816
ISSN：2095-0462
年,卷(期)：2024.19(4)