Local Enhancement of Exciton Emission of Monolayer MoS2 by Copper Phthalocyanine Nanoparticles
- Authors
- Ghimire, Ganesh; Adhikari, Subash; Jo, Seong Gi; Kim, Hyun; Jiang, Jinbao; Joo, Jinsoo; Kim, Jeongyong
- Issue Date
- 29-3월-2018
- Publisher
- AMER CHEMICAL SOC
- Citation
- JOURNAL OF PHYSICAL CHEMISTRY C, v.122, no.12, pp.6794 - 6800
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF PHYSICAL CHEMISTRY C
- Volume
- 122
- Number
- 12
- Start Page
- 6794
- End Page
- 6800
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/76676
- DOI
- 10.1021/acs.jpcc.8b00092
- ISSN
- 1932-7447
- 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.
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