DataVXAdvanced MaterialsPaper
journal article·2021-01

Ternary Ta2PdS6 Atomic Layers for an Ultrahigh Broadband Photoresponsive Phototransistor

Peng Yu, Qingsheng Zeng, Chao Zhu, Liujiang Zhou, Weina Zhao, Jinchao Tong, Zheng Liu, Guowei Yang

Advanced Materials· Volume 33· Issue 2
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Source abstract

Abstract

Abstract 2D noble‐transition‐metal chalcogenides (NTMCs) are emerging as a promising class of optoelectronic materials due to ultrahigh air stability, large bandgap tunability, and high photoresponse. Here, a new set of 2D NTMC: Ta2PdS6 atomic layers is developed, displaying the excellent comprehensive optoelectronic performance with an ultrahigh photoresponsivity of 1.42 × 106 A W−1, detectivity of 7.1 × 1010 Jones and a high photoconductive gain of 2.7 × 106 under laser illumination at a wavelength of 633 nm with a power of 0.025 W m−2, which is ascribed to a photogating effect via study of the device band profiles. Especially, few‐layer Ta2PdS6 exhibits a good broadband photoresponse, ranging from 450 nm in the ultraviolet region to 1450 nm in the shortwave infrared (SIR) region. Moreover, this material also delivers an impressive electronic performance with electron mobility of ≈25 cm2V–1s–1, Ion/Ioff ratio of 106, and a one‐year air stability, which is better than those of most reported 2D materials. Our studies underscore Ta2PdS6 as a promising 2D material for nano‐electronic and nano‐optoelectronic applications.
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Research context

NanomaterialsElectronic materials

OpenAlex topics: 2D Materials and Applications · Perovskite Materials and Applications · MXene and MAX Phase Materials

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

Affiliations

State Key Laboratory of Optoelectronic Materials and Technologies School of Materials Science and Engineering Sun Yat‐sen University Guangzhou 510275 P.R. China

School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore

Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu 610054 P.R. China

Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control School of Environmental Science and Engineering Institute of Environmental Health and Pollution Control Guangdong University of Technology Guangzhou 510006 P.R. China

School of Electrical and Electronic Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore

Funding

Sun Yat-sen University · Natural Science Foundation of Guangdong Province · Young Teacher Foundation of Sun Yat-sen University

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