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Commensurate Assembly of C-60 on Black Phosphorus for Mixed-Dimensional van der Waals Transistors

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Title
Commensurate Assembly of C-60 on Black Phosphorus for Mixed-Dimensional van der Waals Transistors
Author(s)
Tae Keun Yun; Yangjin Lee; Min Je Kim; Jeongwoo Park; Donghee Kang; Seongchan Kim; YoungJin Choi; Yeonjin Yi; Bonggeun Shong; Jeong Ho Cho; Kwanpyo Kim
Publication Date
2022-03
Journal
SMALL, v.18, no.10
Publisher
WILEY-V C H VERLAG GMBH
Abstract
2D crystals can serve as templates for the realization of new van der Waals (vdW) heterostructures via controlled assembly of low-dimensional functional components. Among available 2D crystals, black phosphorus (BP) is unique due to its puckered atomic surface topography, which may lead to strong epitaxial phenomena through guided vdW assembly. Here, it is demonstrated that a BP template can induce highly oriented assembly of C-60 molecular crystals. Transmission electron microscopy and theoretical analysis of the C-60/BP vdW heterostructure clearly confirm that the BP template results in oriented C-60 assembly with higher-order commensurism. Lateral and vertical devices with C-60/BP junctions are fabricated via a lithography-free clean process, which allows one to investigate the ideal electrical properties of pristine C-60/BP junctions. Effective tuning of the C-60/BP junction barrier from 0.2 to 0.5 eV and maximum on-current density higher than 10(4) mA cm(-2) are achieved with graphite/C-60/BP vertical vdW transistors. Due to the formation of high-quality C-60 film and the semitransparent graphite top-electrode, the vertical transistors show high photoresponsivities up to approximate to 100 A W-1 as well as a fast response time under visible light illumination.
URI
https://pr.ibs.re.kr/handle/8788114/11589
DOI
10.1002/smll.202105916
ISSN
1613-6810
Appears in Collections:
Center for Nanomedicine (나노의학 연구단) > 1. Journal Papers (저널논문)
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