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나노 구조 물리 연구단
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Integrated Freestanding Two-dimensional Transition Metal Dichalcogenides

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Title
Integrated Freestanding Two-dimensional Transition Metal Dichalcogenides
Author(s)
Hyun Jeong; Hye Min Oh; Anisha Gokarna; Hyun Kim; Seok Joon Yun; Gang Hee Han; Mun Seok Jeong; Young Hee Lee; Gilles Lerondel
Publication Date
2017-05
Journal
ADVANCED MATERIALS, v.29, no.18, pp.1700308 -
Publisher
WILEY-V C H VERLAG GMBH
Abstract
This paper reports on the integration of freestanding transition metal dichalcogenides (TMDs). Monolayer (1-L) MoS2, WS2, and WSe2 as representative TMDs are transferred on ZnO nanorods (NRs), used here as nanostructured substrates. The photoluminescence (PL) spectra of 1-L TMDs on NRs show a giant PL intensity enhancement, compared with those of 1-L TMDs on SiO2. The strong increases in Raman and PL intensities, along with the characteristic peak shifts, confirm the absence of stress in the TMDs on NRs. In depth analysis of the PL emission also reveals that the ratio between the exciton and trion peak intensity is almost not modified after transfer. The latter shows that the effect of charge transfer between the 1-L TMDs and ZnO NRs is here negligible. Furthermore, confocal PL and Raman spectroscopy reveal a fairly consistent distribution of PL and Raman intensities. These observations are in agreement with a very limited points contact between the support and the 1-L TMDs. The entire process reported here is scalable and may pave the way for the development of very efficient ultrathin optoelectronics. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
URI
https://pr.ibs.re.kr/handle/8788114/3701
ISSN
0935-9648
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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