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Electronic structures and optical characteristics of fluorescent pyrazinoquinoxaline assemblies and Au interfaces

Title
Electronic structures and optical characteristics of fluorescent pyrazinoquinoxaline assemblies and Au interfaces
Authors
Kwon S.Jeong D.Y.Chae W.-S.Noh K.Devi P.Colazzo L.You Y.Choi T.Kim D.-W.
Ewha Authors
김동욱유영민최태영Luciano Colazzo
SCOPUS Author ID
김동욱scopus; 유영민scopus; 최태영scopus
Issue Date
2021
Journal Title
Scientific Reports
ISSN
2045-2322JCR Link
Citation
Scientific Reports vol. 11, no. 1
Publisher
Nature Research
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Understanding the excitonic processes at the interfaces of fluorescent π-conjugated molecules and metal electrodes is important for both fundamental studies and emerging applications. Adsorption configurations of molecules on metal surfaces significantly affect the physical characteristics of junctions as well as molecules. Here, the electronic structures and optical properties of molecular assemblies/Au interfaces were investigated using scanning probe and photoluminescence microscopy techniques. Scanning tunneling microscopy images and tunneling conductance spectra suggested that the self-assembled molecules were physisorbed on the Au surface. Visible-range photoluminescence studies showed that Au thin films modified the emission spectra and reduced the lifetime of excitons. Surface potential maps, obtained by Kelvin probe force microscopy, could visualize electron transfer from the molecules to Au under illumination, which could explain the decreased lifetime of excitons at the molecule/Au interface. © 2021, The Author(s).
DOI
10.1038/s41598-021-96437-x
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자연과학대학 > 물리학전공 > Journal papers
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