Reiser, Patrick (2019)
Modifying and Controlling Diffusion Properties of Molecular Dopants in Organic Semiconductors.
Technische Universität Darmstadt
doi: 10.25534/tuprints-00009460
Dissertation, Erstveröffentlichung
Kurzbeschreibung (Abstract)
Electronic or electrochemical doping of organic semiconductors is a common technique to improve charge carrier injection and charge transport properties of organic layers. However, since dopant diffusion can negatively affect the lifetime of organic devices, preventing molecular dopants from migrating is of great interest. Here, the diffusion properties of molecular dopants are investigated in a sequential doping process studied nondestructively by X-ray photoelectron spectroscopy (XPS) on device relevant length scales to better understand and to identify process parameters like saturation and charge transfer efficiency. In the second part of this work, a new functionalized n-dopant is characterized which is expected to facilitate a controllable immobilization in a broad class of organic semiconductors. The primary anchoring strategy relies on a chemical reaction via azides forming covalent bonds which ultimately prevents the dopant from migrating. Using XPS the charge transfer of the new dopant is directly monitored in combination with the reaction of its anchor group, allowing to correlate chemical reactions with doping or diffusion properties.
Typ des Eintrags: | Dissertation | ||||
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Erschienen: | 2019 | ||||
Autor(en): | Reiser, Patrick | ||||
Art des Eintrags: | Erstveröffentlichung | ||||
Titel: | Modifying and Controlling Diffusion Properties of Molecular Dopants in Organic Semiconductors | ||||
Sprache: | Englisch | ||||
Referenten: | Jaegermann, Prof. Dr. Wolfram ; Pucci, Prof. Dr. Annemarie | ||||
Publikationsjahr: | 2019 | ||||
Ort: | Darmstadt | ||||
Datum der mündlichen Prüfung: | 13 November 2019 | ||||
DOI: | 10.25534/tuprints-00009460 | ||||
URL / URN: | https://tuprints.ulb.tu-darmstadt.de/9460 | ||||
Kurzbeschreibung (Abstract): | Electronic or electrochemical doping of organic semiconductors is a common technique to improve charge carrier injection and charge transport properties of organic layers. However, since dopant diffusion can negatively affect the lifetime of organic devices, preventing molecular dopants from migrating is of great interest. Here, the diffusion properties of molecular dopants are investigated in a sequential doping process studied nondestructively by X-ray photoelectron spectroscopy (XPS) on device relevant length scales to better understand and to identify process parameters like saturation and charge transfer efficiency. In the second part of this work, a new functionalized n-dopant is characterized which is expected to facilitate a controllable immobilization in a broad class of organic semiconductors. The primary anchoring strategy relies on a chemical reaction via azides forming covalent bonds which ultimately prevents the dopant from migrating. Using XPS the charge transfer of the new dopant is directly monitored in combination with the reaction of its anchor group, allowing to correlate chemical reactions with doping or diffusion properties. |
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Alternatives oder übersetztes Abstract: |
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URN: | urn:nbn:de:tuda-tuprints-94603 | ||||
Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik | ||||
Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Oberflächenforschung |
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Hinterlegungsdatum: | 15 Dez 2019 20:55 | ||||
Letzte Änderung: | 15 Dez 2019 20:55 | ||||
PPN: | |||||
Referenten: | Jaegermann, Prof. Dr. Wolfram ; Pucci, Prof. Dr. Annemarie | ||||
Datum der mündlichen Prüfung / Verteidigung / mdl. Prüfung: | 13 November 2019 | ||||
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