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

Ganesh Ghimire; Subash Adhikari; Seong Gi Jo; Hyun Kim; Jinbao Jiang; Jinsoo Joo; Jeongyong Kim

doi:10.1021/acs.jpcc.8b00092

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

Ganesh Ghimire, Subash Adhikari, Seong Gi Jo, Hyun Kim, Jinbao Jiang, Jinsoo Joo, Jeongyong Kim

Department of Physics

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

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.

Original language	English
Pages (from-to)	6794-6800
Number of pages	7
Journal	Journal of Physical Chemistry C
Volume	122
Issue number	12
DOIs	https://doi.org/10.1021/acs.jpcc.8b00092
Publication status	Published - 2018 Mar 29

Bibliographical note

Funding Information:
This study was supported by the IBS-R011-D1 project. J.J. acknowledges the support from the National Research Foundation of Korea (NRF) (no. 2015R1A2A2A01003805), grant funded by the Korean government.

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

Access to Document

10.1021/acs.jpcc.8b00092

Cite this

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title = "Local Enhancement of Exciton Emission of Monolayer MoS2 by Copper Phthalocyanine Nanoparticles",

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.",

author = "Ganesh Ghimire and Subash Adhikari and Jo, {Seong Gi} and Hyun Kim and Jinbao Jiang and Jinsoo Joo and Jeongyong Kim",

note = "Funding Information: This study was supported by the IBS-R011-D1 project. J.J. acknowledges the support from the National Research Foundation of Korea (NRF) (no. 2015R1A2A2A01003805), grant funded by the Korean government.",

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AU - Kim, Hyun

AU - Jiang, Jinbao

AU - Joo, Jinsoo

AU - Kim, Jeongyong

N1 - Funding Information: This study was supported by the IBS-R011-D1 project. J.J. acknowledges the support from the National Research Foundation of Korea (NRF) (no. 2015R1A2A2A01003805), grant funded by the Korean government.

PY - 2018/3/29

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N2 - 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.

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