Heterointerface Screening Effects between Organic Monolayers and Monolayer Transition Metal Dichalcogenides
Type
ArticleAuthors
Zheng, Yu JieHuang, Yu Li
Chen, Yifeng
Zhao, Weijie
Eda, Goki
Spataru, Catalin D.
Zhang, Wenjing
Chang, Yung-Huang
Li, Lain-Jong

Chi, Dongzhi
Quek, Su Ying
Wee, Andrew Thye Shen
KAUST Department
Material Science and Engineering ProgramPhysical Science and Engineering (PSE) Division
Date
2016-01-26Online Publication Date
2016-01-26Print Publication Date
2016-02-23Permanent link to this record
http://hdl.handle.net/10754/621551
Metadata
Show full item recordAbstract
© 2016 American Chemical Society. The nature and extent of electronic screening at heterointerfaces and their consequences on energy level alignment are of profound importance in numerous applications, such as solar cells, electronics etc. The increasing availability of two-dimensional (2D) transition metal dichalcogenides (TMDs) brings additional opportunities for them to be used as interlayers in "van der Waals (vdW) heterostructures" and organic/inorganic flexible devices. These innovations raise the question of the extent to which the 2D TMDs participate actively in dielectric screening at the interface. Here we study perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) monolayers adsorbed on single-layer tungsten diselenide (WSe2), bare graphite, and Au(111) surfaces, revealing a strong dependence of the PTCDA HOMO-LUMO gap on the electronic screening effects from the substrate. The monolayer WSe2 interlayer provides substantial, but not complete, screening at the organic/inorganic interface. Our results lay a foundation for the exploitation of the complex interfacial properties of hybrid systems based on TMD materials.Citation
Zheng YJ, Huang YL, Chen Y, Zhao W, Eda G, et al. (2016) Heterointerface Screening Effects between Organic Monolayers and Monolayer Transition Metal Dichalcogenides. ACS Nano 10: 2476–2484. Available: http://dx.doi.org/10.1021/acsnano.5b07314.Sponsors
The authors thank Zhuo Wang and Qixing Wang for helping us with transferring the CVD-WSe<INF>2</INF> samples and checking the sample quality, Prof. Satoshi Kera and Kyushu Synchrotron Light Research Center (Japan) for ARPES mapping of the clean Au(111) surface, as well as Xin Luo, Kapildeb Dolui, Suchun Li and Zijing Ding for discussions. A.T.S.W. acknowledges support from MOE Grant R-144-000-321-112. S.Y.Q, and Y.C. acknowledge support from Grant NRF-NRFF2013-07 from the National Research Foundation, Singapore. G.E. acknowledges support from Grant NRF-NRFF2011-02 from the National Research Foundation, Singapore. Computations were performed on the NUS Graphene Research Centre cluster. We acknowledge support from the Singapore National Research Foundation, Prime Minister's Office, under its medium-sized centre program. Sandia National Laboratories is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Co., for the U.S. DOE under contract DE-AC04-94AL85000.Publisher
American Chemical Society (ACS)Journal
ACS NanoPubMed ID
26792247ae974a485f413a2113503eed53cd6c53
10.1021/acsnano.5b07314
Scopus Count
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