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Exciton Transfer at Heterointerfaces of MoS2 Monolayers and Fluorescent Molecular Aggregates
- Title
- Exciton Transfer at Heterointerfaces of MoS2 Monolayers and Fluorescent Molecular Aggregates
- Authors
- Kwon, Soyeong; Jeong, Dong Yeun; Hong, Chengyun; Oh, Saejin; Song, Jungeun; Choi, Soo Ho; Kim, Ki Kang; Yoon, Seokhyun; Choi, Taeyoung; Yee, Ki-Ju; Kim, Ji-Hee; You, Youngmin; Kim, Dong-Wook
- Ewha Authors
- 윤석현; 김동욱; 유영민; 최태영
- SCOPUS Author ID
- 윤석현; 김동욱; 유영민; 최태영
- Issue Date
- 2022
- Journal Title
- ADVANCED SCIENCE
- ISSN
- 2198-3844
- Citation
- ADVANCED SCIENCE vol. 9, no. 23
- Keywords
- contact potential difference; exciton transfer; molecular aggregates; MoS2; photoluminescence
- Publisher
- WILEY
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- Integration of distinct materials to form heterostructures enables the proposal of new functional devices based on emergent physical phenomena beyond the properties of the constituent materials. The optical responses and electrical transport characteristics of heterostructures depend on the charge and exciton transfer (CT and ET) at the interfaces, determined by the interfacial energy level alignment. In this work, heterostructures consisting of aggregates of fluorescent molecules (DY1) and 2D semiconductor MoS2 monolayers are fabricated. Photoluminescence spectra of DY1/MoS2 show quenching of the DY1 emission and enhancement of the MoS2 emission, indicating a strong electronic interaction between these two materials. Nanoscopic mappings of the light-induced contact potential difference changes rule out the CT process at the interface. Using femtosecond transient absorption spectroscopy, the rapid interfacial ET process from DY1 aggregates to MoS2 and a fourfold extension of the exciton lifetime in MoS2 are elucidated. These results suggest that the integration of 2D inorganic semiconductors with fluorescent molecules can provide versatile approaches to engineer the physical characteristics of materials for both fundamental studies and novel optoelectronic device applications.
- DOI
- 10.1002/advs.202201875
- Appears in Collections:
- 공과대학 > 화공신소재공학과 > Journal papers
- Files in This Item:
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Advanced Science - 2022 - Kwon - Exciton Transfer at Heterointerfaces of MoS2 Monolayers and Fluorescent Molecular.pdf(1.4 MB)
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