Lee, Jae-Bok Lim, Yi Rang Katiyar, Ajit K. Song, Wooseok Lim, Jongsun Bae, Sukang Kim, Tae-Wook Lee, Seoung-Ki Ahn, Jong-Hyun 2024-01-19T19:03:37Z 2024-01-19T19:03:37Z 2021-09-04 2019-10 0935-9648 https://pubs.kist.re.kr/handle/201004/119527 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-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 mu s. As a feasible application, a WSe2/MoS2-based photodiode array (10 x 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. English WILEY-V C H VERLAG GMBH P-N-JUNCTION LARGE-AREA EPITAXIAL-GROWTH THIN-FILMS MOS2 HETEROJUNCTION LAYERS ENHANCEMENT FABRICATION TRANSITION Direct Synthesis of a Self-Assembled WSe2/MoS2 Heterostructure Array and its Optoelectrical Properties Article 10.1002/adma.201904194 1 ADVANCED MATERIALS, v.31, no.43 ADVANCED MATERIALS 31 43 scie scopus 000486210100001 2-s2.0-85073679960 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article P-N-JUNCTION LARGE-AREA EPITAXIAL-GROWTH THIN-FILMS MOS2 HETEROJUNCTION LAYERS ENHANCEMENT FABRICATION TRANSITION heterojunctions Marangoni flow photodetectors p-n junctions transition-metal dichalcogenides