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Prototypical Organic–Oxide Interface: Intramolecular Resolution of Sexiphenyl on In(2)O(3)(111)
[Image: see text] The performance of an organic semiconductor device is critically determined by the geometric alignment, orientation, and ordering of the organic molecules. Although an organic multilayer eventually adopts the crystal structure of the organic material, the alignment and configuratio...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American
Chemical Society
2018
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5940326/ https://www.ncbi.nlm.nih.gov/pubmed/29589447 http://dx.doi.org/10.1021/acsami.8b02177 |
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author | Wagner, Margareta Hofinger, Jakob Setvín, Martin Boatner, Lynn A. Schmid, Michael Diebold, Ulrike |
author_facet | Wagner, Margareta Hofinger, Jakob Setvín, Martin Boatner, Lynn A. Schmid, Michael Diebold, Ulrike |
author_sort | Wagner, Margareta |
collection | PubMed |
description | [Image: see text] The performance of an organic semiconductor device is critically determined by the geometric alignment, orientation, and ordering of the organic molecules. Although an organic multilayer eventually adopts the crystal structure of the organic material, the alignment and configuration at the interface with the substrate/electrode material are essential for charge injection into the organic layer. This work focuses on the prototypical organic semiconductor para-sexiphenyl (6P) adsorbed on In(2)O(3)(111), the thermodynamically most stable surface of the material that the most common transparent conducting oxide, indium tin oxide, is based on. The onset of nucleation and formation of the first monolayer are followed with atomically resolved scanning tunneling microscopy and noncontact atomic force microscopy (nc-AFM). Annealing to 200 °C provides sufficient thermal energy for the molecules to orient themselves along the high-symmetry directions of the surface, leading to a single adsorption site. The AFM data suggests an essentially planar adsorption geometry. With increasing coverage, the 6P molecules first form a loose network with a poor long-range order. Eventually, the molecules reorient into an ordered monolayer. This first monolayer has a densely packed, well-ordered (2 × 1) structure with one 6P per In(2)O(3)(111) substrate unit cell, that is, a molecular density of 5.64 × 10(13) cm(–2). |
format | Online Article Text |
id | pubmed-5940326 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | American
Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-59403262018-05-09 Prototypical Organic–Oxide Interface: Intramolecular Resolution of Sexiphenyl on In(2)O(3)(111) Wagner, Margareta Hofinger, Jakob Setvín, Martin Boatner, Lynn A. Schmid, Michael Diebold, Ulrike ACS Appl Mater Interfaces [Image: see text] The performance of an organic semiconductor device is critically determined by the geometric alignment, orientation, and ordering of the organic molecules. Although an organic multilayer eventually adopts the crystal structure of the organic material, the alignment and configuration at the interface with the substrate/electrode material are essential for charge injection into the organic layer. This work focuses on the prototypical organic semiconductor para-sexiphenyl (6P) adsorbed on In(2)O(3)(111), the thermodynamically most stable surface of the material that the most common transparent conducting oxide, indium tin oxide, is based on. The onset of nucleation and formation of the first monolayer are followed with atomically resolved scanning tunneling microscopy and noncontact atomic force microscopy (nc-AFM). Annealing to 200 °C provides sufficient thermal energy for the molecules to orient themselves along the high-symmetry directions of the surface, leading to a single adsorption site. The AFM data suggests an essentially planar adsorption geometry. With increasing coverage, the 6P molecules first form a loose network with a poor long-range order. Eventually, the molecules reorient into an ordered monolayer. This first monolayer has a densely packed, well-ordered (2 × 1) structure with one 6P per In(2)O(3)(111) substrate unit cell, that is, a molecular density of 5.64 × 10(13) cm(–2). American Chemical Society 2018-03-28 2018-04-25 /pmc/articles/PMC5940326/ /pubmed/29589447 http://dx.doi.org/10.1021/acsami.8b02177 Text en Copyright © 2018 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. |
spellingShingle | Wagner, Margareta Hofinger, Jakob Setvín, Martin Boatner, Lynn A. Schmid, Michael Diebold, Ulrike Prototypical Organic–Oxide Interface: Intramolecular Resolution of Sexiphenyl on In(2)O(3)(111) |
title | Prototypical
Organic–Oxide Interface: Intramolecular Resolution of Sexiphenyl
on In(2)O(3)(111) |
title_full | Prototypical
Organic–Oxide Interface: Intramolecular Resolution of Sexiphenyl
on In(2)O(3)(111) |
title_fullStr | Prototypical
Organic–Oxide Interface: Intramolecular Resolution of Sexiphenyl
on In(2)O(3)(111) |
title_full_unstemmed | Prototypical
Organic–Oxide Interface: Intramolecular Resolution of Sexiphenyl
on In(2)O(3)(111) |
title_short | Prototypical
Organic–Oxide Interface: Intramolecular Resolution of Sexiphenyl
on In(2)O(3)(111) |
title_sort | prototypical
organic–oxide interface: intramolecular resolution of sexiphenyl
on in(2)o(3)(111) |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5940326/ https://www.ncbi.nlm.nih.gov/pubmed/29589447 http://dx.doi.org/10.1021/acsami.8b02177 |
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