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

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...

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Autores principales:	Soyeong Kwon, Dong Yeun Jeong, Weon-Sik Chae, Kyungju Noh, P. Devi, Luciano Colazzo, Youngmin You, Taeyoung Choi, Dong-Wook Kim
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/69a0c85d15ef4efb8416eda72f60fd4f
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spelling	oai:doaj.org-article:69a0c85d15ef4efb8416eda72f60fd4f2021-12-02T17:08:44ZElectronic structures and optical characteristics of fluorescent pyrazinoquinoxaline assemblies and Au interfaces10.1038/s41598-021-96437-x2045-2322https://doaj.org/article/69a0c85d15ef4efb8416eda72f60fd4f2021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-96437-xhttps://doaj.org/toc/2045-2322Abstract 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.Soyeong KwonDong Yeun JeongWeon-Sik ChaeKyungju NohP. DeviLuciano ColazzoYoungmin YouTaeyoung ChoiDong-Wook KimNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Soyeong Kwon Dong Yeun Jeong Weon-Sik Chae Kyungju Noh P. Devi Luciano Colazzo Youngmin You Taeyoung Choi Dong-Wook Kim Electronic structures and optical characteristics of fluorescent pyrazinoquinoxaline assemblies and Au interfaces
description	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.
format	article
author	Soyeong Kwon Dong Yeun Jeong Weon-Sik Chae Kyungju Noh P. Devi Luciano Colazzo Youngmin You Taeyoung Choi Dong-Wook Kim
author_facet	Soyeong Kwon Dong Yeun Jeong Weon-Sik Chae Kyungju Noh P. Devi Luciano Colazzo Youngmin You Taeyoung Choi Dong-Wook Kim
author_sort	Soyeong Kwon
title	Electronic structures and optical characteristics of fluorescent pyrazinoquinoxaline assemblies and Au interfaces
title_short	Electronic structures and optical characteristics of fluorescent pyrazinoquinoxaline assemblies and Au interfaces
title_full	Electronic structures and optical characteristics of fluorescent pyrazinoquinoxaline assemblies and Au interfaces
title_fullStr	Electronic structures and optical characteristics of fluorescent pyrazinoquinoxaline assemblies and Au interfaces
title_full_unstemmed	Electronic structures and optical characteristics of fluorescent pyrazinoquinoxaline assemblies and Au interfaces
title_sort	electronic structures and optical characteristics of fluorescent pyrazinoquinoxaline assemblies and au interfaces
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/69a0c85d15ef4efb8416eda72f60fd4f
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Electronic structures and optical characteristics of fluorescent pyrazinoquinoxaline assemblies and Au interfaces

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