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Kirchhuebel T, Monti OLA, Munakata T, Kera S, Forker R, Fritz T. The role of initial and final states in molecular spectroscopies. Phys Chem Chem Phys 2019; 21:12730-12747. [DOI: 10.1039/c8cp07318j] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Interpreting experimental spectra of thin films of organic semiconductors is challenging, and understanding the relationship between experimental data obtained by different spectroscopic techniques requires a careful consideration of the initial and final states for each process.
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Affiliation(s)
- Tino Kirchhuebel
- Institute of Solid State Physics
- Friedrich Schiller University Jena
- 07743 Jena
- Germany
| | - Oliver L. A. Monti
- Department of Chemistry and Biochemistry
- University of Arizona
- Tucson
- USA
- Department of Physics
| | - Toshiaki Munakata
- Department of Chemistry
- Graduate School of Science
- Osaka University
- Toyonaka 560-0043
- Japan
| | - Satoshi Kera
- Institute for Molecular Science (IMS)
- National Institutes of Natural Sciences, and SOKENDAI
- Okazaki 444-8585
- Japan
| | - Roman Forker
- Institute of Solid State Physics
- Friedrich Schiller University Jena
- 07743 Jena
- Germany
| | - Torsten Fritz
- Institute of Solid State Physics
- Friedrich Schiller University Jena
- 07743 Jena
- Germany
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Mehler A, Kirchhuebel T, Néel N, Sojka F, Forker R, Fritz T, Kröger J. Ordered Superstructures of a Molecular Electron Donor on Au(111). Langmuir 2017; 33:6978-6984. [PMID: 28602078 DOI: 10.1021/acs.langmuir.7b00306] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The molecular donor tetraphenyldibenzoperiflanthene (DBP) forms coverage-dependent superstructures on Au(111). At submonolayer coverage, the molecules align parallel to each other. They arrange in row-like structures, which exhibit a nearly rectangular primitive unit cell. By contrast, the molecular monolayer is characterized by a herringbone-type DBP arrangement spanned by an almost square unit cell containing two molecules. Both superstructures occur simultaneously in a narrow coverage range close to completion of the molecular monolayer. The adsorbate-substrate interaction is similar to other physisorbed molecular films on Au(111), but differs for the two adsorption phases as inferred from the different modification of the Au(111) surface reconstruction. Structural properties were consistently probed in real and reciprocal space by scanning tunneling microscopy and low-energy electron diffraction, respectively.
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Affiliation(s)
- A Mehler
- Institut für Physik, Technische Universität Ilmenau , D-98693 Ilmenau, Germany
| | - T Kirchhuebel
- Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena , D-07743 Jena, Germany
| | - N Néel
- Institut für Physik, Technische Universität Ilmenau , D-98693 Ilmenau, Germany
| | - F Sojka
- Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena , D-07743 Jena, Germany
| | - R Forker
- Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena , D-07743 Jena, Germany
| | - T Fritz
- Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena , D-07743 Jena, Germany
| | - J Kröger
- Institut für Physik, Technische Universität Ilmenau , D-98693 Ilmenau, Germany
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Udhardt C, Otto F, Kern C, Lüftner D, Huempfner T, Kirchhuebel T, Sojka F, Meissner M, Schröter B, Forker R, Puschnig P, Fritz T. Influence of Film and Substrate Structure on Photoelectron Momentum Maps of Coronene Thin Films on Ag(111). J Phys Chem C Nanomater Interfaces 2017; 121:12285-12293. [PMID: 28620448 PMCID: PMC5467179 DOI: 10.1021/acs.jpcc.7b03500] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Indexed: 05/17/2023]
Abstract
Angle-resolved ultraviolet photoelectron spectroscopy (ARUPS) was measured for one-monolayer coronene films deposited on Ag(111). The (kx ,ky )-dependent photoelectron momentum maps (PMMs), which were extracted from the ARUPS data by cuts at fixed binding energies, show finely structured patterns for the highest and the second-highest occupied molecular orbitals. While the substructure of the PMM main features is related to the 4 × 4 commensurate film structure, various features with three-fold symmetry imply an additional influence of the substrate. PMM simulations on the basis of both free-standing coronene assemblies and coronene monolayers on the Ag(111) substrate confirm a sizable molecule-molecule interaction because no substructure was observed for PMM simulations using free coronene molecules.
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Affiliation(s)
- Christian Udhardt
- Institute
of Solid State Physics, Friedrich Schiller
University Jena, Helmholtzweg 5, 07743 Jena, Germany
| | - Felix Otto
- Institute
of Solid State Physics, Friedrich Schiller
University Jena, Helmholtzweg 5, 07743 Jena, Germany
| | - Christian Kern
- Institute
of Physics, University of Graz, NAWI-Graz, Universitätsplatz 5, 8010 Graz, Austria
| | - Daniel Lüftner
- Institute
of Physics, University of Graz, NAWI-Graz, Universitätsplatz 5, 8010 Graz, Austria
| | - Tobias Huempfner
- Institute
of Solid State Physics, Friedrich Schiller
University Jena, Helmholtzweg 5, 07743 Jena, Germany
| | - Tino Kirchhuebel
- Institute
of Solid State Physics, Friedrich Schiller
University Jena, Helmholtzweg 5, 07743 Jena, Germany
| | - Falko Sojka
- Institute
of Solid State Physics, Friedrich Schiller
University Jena, Helmholtzweg 5, 07743 Jena, Germany
| | - Matthias Meissner
- Institute
of Solid State Physics, Friedrich Schiller
University Jena, Helmholtzweg 5, 07743 Jena, Germany
| | - Bernd Schröter
- Institute
of Solid State Physics, Friedrich Schiller
University Jena, Helmholtzweg 5, 07743 Jena, Germany
| | - Roman Forker
- Institute
of Solid State Physics, Friedrich Schiller
University Jena, Helmholtzweg 5, 07743 Jena, Germany
| | - Peter Puschnig
- Institute
of Physics, University of Graz, NAWI-Graz, Universitätsplatz 5, 8010 Graz, Austria
| | - Torsten Fritz
- Institute
of Solid State Physics, Friedrich Schiller
University Jena, Helmholtzweg 5, 07743 Jena, Germany
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Kirchhuebel T, Gruenewald M, Sojka F, Kera S, Bussolotti F, Ueba T, Ueno N, Rouillé G, Forker R, Fritz T. Self-Assembly of Tetraphenyldibenzoperiflanthene (DBP) Films on Ag(111) in the Monolayer Regime. Langmuir 2016; 32:1981-7. [PMID: 26844381 DOI: 10.1021/acs.langmuir.5b04069] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Tetraphenyldibenzoperiflanthene (DBP) is a promising candidate as a component of highly efficient organic photovoltaic cells and organic light-emitting diodes. The structural properties of thin films of this particular lander-type molecule on Ag(111) were investigated by complementary techniques. Highly ordered structures were obtained, and their mutual alignment was characterized by means of low-energy electron diffraction (LEED). Scanning tunneling microscopy (STM) images reveal two slightly different arrangements within the first monolayer (ML), both describable as specific herringbone patterns with two molecules per unit cell whose dibenzoperiflanthene framework is parallel to the surface. In contrast, single DBP molecules in the second ML were imaged with much higher intramolecular resolution, resembling the shape of the frontier orbitals in the gas phase as calculated by means of density functional theory (DFT). Further deposition leads to the growth of highly ordered bilayer islands on top of the first ML with identical unit cell dimensions and orientation but slightly inclined molecules. This suggests that the first ML acts as a template for the epitaxial growth of further layers. Simultaneously, a significant number of second-layer molecules mainly located at step edges or scattered over narrow terraces do not form highly ordered aggregates.
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Affiliation(s)
- Tino Kirchhuebel
- Institute of Solid State Physics, Friedrich Schiller University Jena , Helmholtzweg 5, 07743 Jena, Germany
| | - Marco Gruenewald
- Institute of Solid State Physics, Friedrich Schiller University Jena , Helmholtzweg 5, 07743 Jena, Germany
| | - Falko Sojka
- Institute of Solid State Physics, Friedrich Schiller University Jena , Helmholtzweg 5, 07743 Jena, Germany
| | - Satoshi Kera
- Institute for Molecular Science , Myodaiji, Okazaki 444-8585, Japan
- SOKENDAI, The Graduate University for Advanced Studies , Okazaki 444-8585, Japan
- Graduate School of Advanced Integration Science, Chiba University , Chiba 263-8522, Japan
| | - Fabio Bussolotti
- Institute for Molecular Science , Myodaiji, Okazaki 444-8585, Japan
| | - Takahiro Ueba
- Institute for Molecular Science , Myodaiji, Okazaki 444-8585, Japan
- SOKENDAI, The Graduate University for Advanced Studies , Okazaki 444-8585, Japan
| | - Nobuo Ueno
- Graduate School of Advanced Integration Science, Chiba University , Chiba 263-8522, Japan
| | - Gaël Rouillé
- Laboratory Astrophysics Group of the Max Planck Institute for Astronomy, Institute of Solid State Physics, Friedrich Schiller University Jena , Helmholtzweg 3, 07743 Jena, Germany
| | - Roman Forker
- Institute of Solid State Physics, Friedrich Schiller University Jena , Helmholtzweg 5, 07743 Jena, Germany
| | - Torsten Fritz
- Institute of Solid State Physics, Friedrich Schiller University Jena , Helmholtzweg 5, 07743 Jena, Germany
- Department of Chemistry, Graduate School of Science and Institute for Academic Initiatives, Osaka University , 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
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Rouillé G, Kirchhuebel T, Rink M, Gruenewald M, Kröger J, Forker R, Fritz T. Identification of vibrational excitations and optical transitions of the organic electron donor tetraphenyldibenzoperiflanthene (DBP). Phys Chem Chem Phys 2015; 17:30404-16. [DOI: 10.1039/c5cp03761a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The spectra of DBP grains (IR) and rare-gas-matrix-isolated molecules (UV/vis) are used to analyze HREELS and DRS measurements of DBP molecules adsorbed on Au(111) and mica(0001).
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Affiliation(s)
- Gaël Rouillé
- Laboratory Astrophysics Group of the Max Planck Institute for Astronomy at the Friedrich Schiller University Jena
- Institute of Solid State Physics
- 07743 Jena
- Germany
| | - Tino Kirchhuebel
- Institute of Solid State Physics
- Friedrich Schiller University
- 07743 Jena
- Germany
| | - Marcel Rink
- Institut für Physik
- Technische Universität Ilmenau
- 98693 Ilmenau
- Germany
| | - Marco Gruenewald
- Institute of Solid State Physics
- Friedrich Schiller University
- 07743 Jena
- Germany
| | - Jörg Kröger
- Institut für Physik
- Technische Universität Ilmenau
- 98693 Ilmenau
- Germany
| | - Roman Forker
- Institute of Solid State Physics
- Friedrich Schiller University
- 07743 Jena
- Germany
| | - Torsten Fritz
- Institute of Solid State Physics
- Friedrich Schiller University
- 07743 Jena
- Germany
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