凯发

While scaling the dimensions of semiconductors down to nanoscale, novelproperties, such as ultrahigh specific surfaces, quantum confinement effect andstrong light-matter interaction, will show out. Among the low dimensionalstructures, two-dimensional (2D) semiconductors may lead the next resolution inelectronics and optoelectronics due to their compatibility with traditionalmicro-fabrication techniques as well as flexible substrates. Up to now, both layeredand non-layered materials have been demonstrated to present in 2D geometry. Forthe former, even though big breakthroughs have been made, especially on transitionmetal dichalcogenides (TMDCs), more systematical and deeper studies are needed.Noticeably, inspired by the success of 2D layered materials and the fact that manymaterials with significant functions have non-layered crystal structures, 2Dnon-layered materials have attracted increasing attentions.

In addition, with potential applications in high-speed topological logic devices, therecently discovered topological crystalline insulators (TCIs) have attractedconsiderable interests. However, owing to the intrinsic istropic crystallinestructure, it is not an easy job to synthesize these TCIs into low-dimensional structures,in which the topological surface transport may be strongly enhanced. As aresult, reseach on TCIsis limited. Based on above challengesand motivations, our research focuses on the design, synthesis and applicationsof low dimensional metal chalcogenides semiconductors. In this talk, I willpresent our recent progress on the following two aspects:

(1)2D layered and non-layered metal chalcogenide semiconductors: controllablesynthesis, properties, electronic and optoelectronic applications.

(2)Topological crystalline insulators: synthesis dynamics and surface transport.