Triphenylene-Derived Electron Acceptors and Donors on Ag(111): Formation of Intermolecular Charge-Transfer Complexes with Common Unoccupied Molecular States.
acceptor molecules
charge-transfer complex
donor molecules
photoelectron spectroscopy
scanning tunneling microscopy and spectroscopy
self-assembly
Journal
Small (Weinheim an der Bergstrasse, Germany)
ISSN: 1613-6829
Titre abrégé: Small
Pays: Germany
ID NLM: 101235338
Informations de publication
Date de publication:
Aug 2019
Aug 2019
Historique:
received:
05
04
2019
revised:
14
06
2019
pubmed:
3
7
2019
medline:
3
7
2019
entrez:
3
7
2019
Statut:
ppublish
Résumé
Over the past years, ultrathin films consisting of electron donating and accepting molecules have attracted increasing attention due to their potential usage in optoelectronic devices. Key parameters for understanding and tuning their performance are intermolecular and molecule-substrate interactions. Here, the formation of a monolayer thick blend of triphenylene-based organic donor and acceptor molecules from 2,3,6,7,10,11-hexamethoxytriphenylene (HAT) and 1,4,5,8,9,12-hexaazatriphenylenehexacarbonitrile (HATCN), respectively, on a silver (111) surface is reported. Scanning tunneling microscopy and spectroscopy, valence and core level photoelectron spectroscopy, as well as low-energy electron diffraction measurements are used, complemented by density functional theory calculations, to investigate both the electronic and structural properties of the homomolecular as well as the intermixed layers. The donor molecules are weakly interacting with the Ag(111) surface, while the acceptor molecules show a strong interaction with the substrate leading to charge transfer and substantial buckling of the top silver layer and of the adsorbates. Upon mixing acceptor and donor molecules, strong hybridization occurs between the two different molecules leading to the emergence of a common unoccupied molecular orbital located at both the donor and acceptor molecules. The donor acceptor blend studied here is, therefore, a compelling candidate for organic electronics based on self-assembled charge-transfer complexes.
Identifiants
pubmed: 31264784
doi: 10.1002/smll.201901741
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e1901741Subventions
Organisme : Netherlands Organisation for Scientific Research
ID : 700.10.424
Organisme : Netherlands Organisation for Scientific Research
ID : 722.012.010
Organisme : European Research Council
ID : ERC-2012-StG307760-SURFPRO
Pays : International
Organisme : Zernike Institute for Advanced Materials of the University of Groningen
Organisme : Deutsche Forschungsgemeinschaft
ID : 182849149-SFB 953
Organisme : Deutsche Forschungsgemeinschaft
ID : 401247651-KI1662/3-1
Organisme : U.S. Department of Energy
ID : DE-FG02-11ER16243
Organisme : U.S. Department of Energy
Organisme : U.S. Department of Energy Basic Energy Science
ID : DE-FG02-11ER16243
Organisme : Office of Science of the U.S. Department of Energy
Informations de copyright
© 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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