Local Enhancement of Exciton Emission of Monolayer MoS2 by Copper Phthalocyanine Nanoparticles

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Title
Local Enhancement of Exciton Emission of Monolayer MoS2 by Copper Phthalocyanine Nanoparticles
Author(s)
Ganesh Ghimire; Subash Adhikari; Seong Gi Jo; Hyun Kim; Jinbao Jiang; Jinsoo Joo; Jeongyong Kim
Publication Date
2018-03
Journal
Journal of Physical Chemistry C, v.122, no.12, pp.6794 - 6800
Publisher
AMER CHEMICAL SOC
Abstract
Monolayer transition-metal dichalcogenides (1L-TMDs) provide ideal platforms to study light emission using two-dimensionally confined excitons. Recent studies have shown that the exciton emissions of 1L-TMDs can be conveniently modulated by developing heterostructures with zero-dimensional nanoparticles (NPs) or quantum dots. In this study, we synthesized organic semiconducting copper phthalocyanine (CuPc) NPs with sizes in the range of 30-70 nm by a re-precipitation method and decorated the chemical vapor deposition-grown 1L-MoS2 with these NPs. This hybrid system exhibited a 6 times larger local photoluminescence (PL) at the positions of the CuPc NPs compared with the pristine 1L-MoS2 sample. The PL enhancement and spectral modification of the 1L-MoS2 decorated with CuPc NPs were attributed to the p-doping effect of the CuPc NPs, confirmed by spectral analysis and field-effect transistor measurements. © 2018 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/4624
ISSN
1932-7447
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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