Sheng-Kuei Chiu, Guan-Shuo Huang, Wen-Jiun Liu, Cheng-Yang Cai, Yan-Hao Chen, National University of Tainan, Taiwan
The transition to post-silicon electronics has been greatly sped up by the arrival of two-dimensional (2D) materials. However, the move from being a laboratory curiosity to being useful in industry is still being held back by problems with scalable synthesis and defect engineering. This work focuses on how to regulate Chemical Vapor Deposition (CVD) methods to achieve optoelectronic and magnetic properties that can be controlled. The work presented two main process innovations: Atomic substitution technology and doping engineering. These methods have integrated into the fabrication of wafer-scale Transition Metal Dichalcogenides (TMDs), such as Tungsten Disulfide (WS₂) and Molybdenum Disulfide (MoS₂), which exhibit tunable photoluminescence and room temperature ferromagnetic properties. Additionally, the study broadens the functional scope of 2D materials into the magnetic realm, showcasing the straightforward synthesis of ferromagnetic single-crystal Vanadium Disulfide (VS₂) monolayers that challenge the Mermin-Wagner theorem by displaying strong magnetic ordering at ambient temperature. This work creates a complete framework for making flexible functional applications in the next generation of optoelectronics, spintronics, and sensing technologies by combining new developments in synthesis.