Salt-assisted chemical vapor deposition of two-dimensional materials

作     者：Wei Han Kailang Liu Sanjun Yang Fakun Wang Jianwei Su Bao Jin Huiqiao Li Tianyou Zhai 

作者机构：State Key Laboratory of Material Processing and Die and Mould TechnologySchool of Materials Science and EngineeringHuazhong University of Science and Technology 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2019年第62卷第10期

页      面：1300-1311页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by the National Natural Science Foundation of China (21825103, 51727809) the Fundamental Research Funds for the Central University (2019kfy XMBZ018) the project funded by China Postdoctoral Science Foundation (2018M642832) 

主　　题：salt-assisted chemical vapor deposition 2D materials transition metal dichalcogenides non-layered materials 

摘      要：Two-dimensional(2D) materials with atomic thickness are promising candidates for the applications in future semiconductor devices, owing to their fascinating physical properties and superlative optoelectronic performance. Chemical vapor deposition(CVD) is considered to be an efficient method for large-scale preparation of 2D materials toward practical ***, the high melting points of metal precursors and the thermodynamics instabilities of metastable phases limit the direct CVD synthesis of plenty of 2D materials. The salt has recently been introduced into the CVD process, which proved to be effective to address these issues. In this review, we highlighted the latest progress in the salt-assisted CVD growth of 2D materials, including layered and non-layered crystals. Firstly, strategies of adding salts are summarized. Then, the salt-assisted growth of various layered materials is presented, emphasizing on the transition metal chalcogenides of stable and metastable phases. Furthermore, strategies to grow ultrathin non-layered materials are discussed. We provide viewpoints into the techniques of using salt, the effects of salt, and the growth mechanisms of 2D crystals. Finally, we offer the challenges to be overcome and further research directions of this emerging salt-assisted CVD technique.