journal article·2019-04Open access

Unraveling High‐Yield Phase‐Transition Dynamics in Transition Metal Dichalcogenides on Metallic Substrates

Xinmao Yin, Chi Sin Tang, Di Wu, Weilong Kong, Changjian Li, Qixing Wang, Liang Cao, Ming Yang, Yung‐Huang Chang, Dianyu Qi, Fangping Ouyang, Stephen J. Pennycook, Yuan Ping Feng, Mark B. H. Breese, Shi Jie Wang, Wenjing Zhang, Andrivo Rusydi, Andrew T. S. Wee

Advanced Science· Volume 6· Issue 7

Abstract

Abstract 2D transition metal dichalcogenides (2D‐TMDs) and their unique polymorphic features such as the semiconducting 1H and quasi‐metallic 1T′ phases exhibit intriguing optical and electronic properties, which can be used in novel electronic and photonic device applications. With the favorable quasi‐metallic nature of 1T′‐phase 2D‐TMDs, the 1H‐to‐1T′ phase engineering processes are an immensely vital discipline exploited for novel device applications. Here, a high‐yield 1H‐to‐1T′ phase transition of monolayer‐MoS2 on Cu and monolayer‐WSe2 on Au via an annealing‐based process is reported. A comprehensive experimental and first‐principles study is performed to unravel the underlying mechanism and derive the general trends for the high‐yield phase transition process of 2D‐TMDs on metallic substrates. While each 2D‐TMD possesses different intrinsic 1H‐1T′ energy barriers, the option of metallic substrates with higher chemical reactivity plays a significantly pivotal role in enhancing the 1H‐1T′ phase transition yield. The yield increase is achieved via the enhancement of the interfacial hybridizations by the means of increased interfacial binding energy, larger charge transfer, shorter interfacial spacing, and weaker bond strength. Fundamentally, this study opens up the field of 2D‐TMD/metal‐like systems to further scientific investigation and research, thereby creating new possibilities for 2D‐TMDs‐based device applications.
Source: crossref · Quality: baseline

Research context

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

Department of Physics Faculty of Science National University of Singapore Singapore 117542 Singapore

Singapore Synchrotron Light Source (SSLS) National University of Singapore Singapore 117603 Singapore

NUS Graduate School for Integrative Sciences and Engineering National University of Singapore Singapore 117456 Singapore

International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology Shenzhen University Shenzhen 518060 China

Hunan Key Laboratory of Super‐microstructure and Ultrafast Process School of Physics and Electronics Central South University No. 932, South Lushan Road Changsha Hunan Province 410083 China

Department of Materials Science and Engineering National University of Singapore 9 Engineering Drive 1 Singapore 117575 Singapore

Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field Laboratory of the Chinese Academy of Sciences Hefei 230031 China

Institute of Materials Research and Engineering A∗STAR (Agency for Science, Technology and Research) 2 Fusionopolis Way Singapore 138634 Singapore

Bachelor Program in Interdisciplinary Studies National Yunlin University of Science and Technology Yunlin 640 Taiwan

Funding

National Natural Science Foundation of China · Guangdong Science and Technology Department · China Postdoctoral Science Foundation · National Research Foundation Singapore · Ministry of Education - Singapore · Fondation Pour la Recherche en Chimie · Science and Engineering Research Council

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