Direct Synthesis of a Self-Assembled WSe2/MoS2 Heterostructure Array and its Optoelectrical Properties
- Direct Synthesis of a Self-Assembled WSe2/MoS2 Heterostructure Array and its Optoelectrical Properties
- 배수강; 이승기; Jae-Bok Lee; Yi Rang Lim; Ajit K. Katiyar; Wooseok Song; Jongsun Lim; Tae-Wook Kim; Jong-Hyun Ahn
- Issue Date
- Advanced materials
- VOL 31, NO 43-1904194-9
- n heterojunction shows not only high rectification (ideality factor: 1.18) but also promising optoelectrical properties with a high responsivity of 5.39 A W− 1 and response speed of 16 µ s. As a feasible application, a WSe2/MoS2‐ based photodiode array (10 × 10) is demonstrated, which proves that the photosensing system can detect the position and intensity of an external light source. The solution‐ based growth of hierarchical structures with various alignments could offer a method for the further development of large‐ area electronic and optoelectronic applications.; Functional van der Waals heterojunctions of transition metal dichalcogenides are emerging as a potential candidate for the basis of next‐ generation logic devices and optoelectronics. However, the complexity of synthesis processes so far has delayed the successful integration of the heterostructure device array within a large scale, which is necessary for practical applications. Here, a direct synthesis method is introduced to fabricate an array of self‐ assembled WSe2/MoS2 heterostructures through facile solution‐ based directional precipitation. By manipulating the internal convection flow (i.e., Marangoni flow) of the solution, the WSe2 wires are selectively stacked over the MoS2 wires at a specific angle, which enables the formation of parallel‐ and cross‐ aligned heterostructures. The realized WSe2/MoS2‐ based p–
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