DataVXAdvanced MaterialsPaper
journal article·2022-12Open access

2D Transition Metal Dichalcogenide with Increased Entropy for Piezoelectric Electronics

Yulong Chen, Ziao Tian, Xiang Wang, Nian Ran, Chen Wang, Anyang Cui, Huihui Lu, Miao Zhang, Zhongying Xue, Yongfeng Mei, Paul K. Chu, Jianjun Liu, Zhigao Hu, Zengfeng Di

Advanced Materials· Volume 34· Issue 48
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Source abstract

Abstract

Abstract Piezoelectricity in 2D transition metal dichalcogenides (TMDs) has attracted considerable interest because of their excellent flexibility and high piezoelectric coefficient compared to conventional piezoelectric bulk materials. However, the ability to regulate the piezoelectric properties is limited because the entropy is constant for certain binary TMDs other than multielement ones. Herein, in order to increase the entropy, a ternary TMDs alloy, Mo1−xWxS2, with different W concentrations, is synthesized. The W concentration in the Mo1−xWxS2 alloy can be controlled precisely in the low‐supersaturation synthesis and the entropy can be tuned accordingly. The Mo0.46W0.54S2 alloy (x = 0.54) has the highest configurational entropy and best piezoelectric properties, such as a piezoelectric coefficient of 4.22 pm V−1 and a piezoelectric output current of 150 pA at 0.24% strain. More importantly, it can be combined into a larger package to increase the output current to 600 pA to cater to self‐powered applications. Combining with excellent mechanical durability, a mechanical sensor based on the Mo0.46W0.54S2 alloy is demonstrated for real‐time health monitoring.
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Research context

Metals & alloys

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

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

Affiliations

State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China

Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Science Beijing 100049 China

Technical Center for Multifunctional Magneto‐Optical Spectroscopy (Shanghai) Engineering Research Center of Nanophotonics & Advanced Instrument (Ministry of Education) Department of Materials School of Physics and Electronic Science East China Normal University Shanghai 200241 China

State Key Laboratory of High Performance Ceramics and Superfine Microstructures Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China

Department of Materials Science Fudan University Shanghai 200433 China

Department of Physics Department of Materials Science and Engineering, and Department of Biomedical Engineering City University of Hong Kong Tat Chee Avenue, Kowloon Hong Kong China

Funding

National Natural Science Foundation of China · Chinese Academy of Sciences · National Science and Technology Major Project · Science and Technology Commission of Shanghai Municipality

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