Epitaxial growth of a monolayer WSe2-MoS2 lateral p-n junction with an atomically sharp interface
AuthorsLi, Ming Yang
Cheng, Chia Chin
Lu, Li Syuan
Lin, Yung Chang
Tsai, Meng Lin
Chu, Chih Wei
Wei, Kung Hwa
Chang, Wen Hao
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
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AbstractTwo-dimensional transition metal dichalcogenides (TMDCs) such as molybdenum sulfide MoS2 and tungsten sulfide WSe2 have potential applications in electronics because they exhibit high on-off current ratios and distinctive electro-optical properties. Spatially connected TMDC lateral heterojunctions are key components for constructing monolayer p-n rectifying diodes, light-emitting diodes, photovoltaic devices, and bipolar junction transistors. However, such structures are not readily prepared via the layer-stacking techniques, and direct growth favors the thermodynamically preferred TMDC alloys. We report the two-step epitaxial growth of lateral WSe2-MoS2 heterojunction, where the edge of WSe2 induces the epitaxial MoS2 growth despite a large lattice mismatch. The epitaxial growth process offers a controllable method to obtain lateral heterojunction with an atomically sharp interface.
CitationLi M-Y, Shi Y, Cheng C-C, Lu L-S, Lin Y-C, et al. (2015) Epitaxial growth of a monolayer WSe2-MoS2 lateral p-n junction with an atomically sharp interface. Science 349: 524–528. Available: http://dx.doi.org/10.1126/science.aab4097.
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