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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
101

Controlling the Physical Properties of Organic Semiconductors through Siloxane Chemistry and other Organic Electronic Materials

Kamino, Brett Akira 10 January 2014 (has links)
Triarylamine type materials with vastly altered physical properties are synthesized by hybridizing organic semiconducting structures with silicone and siloxane groups. By altering the silicon content of these materials, we can tune their physical composition from free flowing liquids, to amorphous glasses, to cross-linked films. Much of this modification is enabled by the unique use of a metal-free Si-H activation chemistry; the Piers-Rubinsztajn reaction. This chemistry is demonstrated to be a general and rapid way to build up hybrid semiconducting structures. Key to the utility of these materials in electronic devices, it is shown that hybridization with silicon groups has a negligible effect on the useful electrochemical properties of the base materials. Building on this, it is shown that charge carrier mobility through a prototypical liquid organic semiconductor is similar to the base materials and transport is described by existing dispersive transport theories. Finally, two side projects in the area of organic electronics are discussed. New phthalonitrile based fluorophores are characterized and their utility as deep-blue emitting dopants in organic light emitting diodes is demonstrated. These same π-extended phthalonitriles can also be used as precursors to new red-shifted BsubPcs which display exceptional electrochemical stability and tuning.
102

Side-chain functionalized luminescent polymers for organic light-emitting diode applications

Kimyonok, Alpay 02 July 2008 (has links)
This thesis aims to provide a detailed understanding of side-chain functionalized polymers as emissive materials for OLEDs. The syntheses and photophysical properties of these solution-processable materials as well as the effects of metal types, polymer backbones, chain lengths, spacer types and lengths, host types, and concentrations of the metal complexes on the emission properties and device performance will be dicussed. The polymers were functionalized with host materials along with the metal complexes to enhance the charge transport and to obtain energy transfer from the host to the complex. The physical and photophysical properties of the polymers were tuned by changing the backbone and the metal complex. Poly(norbornene)s, poly(cyclooctene)s, and poly(styrene)s were studied. The differences in the glass transition temperatures and PDIs of the polymers indicated that device performances might be affected by the polymer type due to the differences in the processability of the polymers. In addition to the backbone, it was found that device performance is dependent on various parameters such as molecular weight, metal loading, spacer type, and spacer length. In each case, it was found that the polymer backbone does not interfere with the basic photopysical properties of the metal complexes. The two main classes of metal complexes studied in this thesis are metalloquinolates and iridium complexes. It was shown that the emission properties of poly(cyclooctene)s containing 8-hydroxyquinolines in their side-chains could be altered by simply changing the metal. Green- and near IR-emitting polymers were synthesized by employing aluminum and ytterbium, respectively. On the other hand, for the iridium complexes, changes in color were achieved by varying the ligands. Iridium containing polymers with emission spectra that span the entire visible spectrum were synthesized by employing the appropriate ligands. It was demonstrated that OLEDs with high efficiencies can be fabricated by using these polymers as the emissive layer.
103

Optimal sub pixel arrangements and coding for ultra-high resolution three-dimensional OLED displays

Yordanov, Zhivko. Unknown Date (has links) (PDF)
Kassel, University, Diss., 2007.
104

Transparente Elektronik für Aktiv-Matrix-Displays

Görrn, Patrick January 2008 (has links)
Zugl.: Braunschweig, Techn. Univ., Diss., 2008
105

Organische Leuchtdioden Entwicklung von Verfahren zur Integration in Folientastaturen als neues elektrisch aktives Element

Friedrich, Joachim January 2008 (has links)
Zugl.: Kassel, Univ., Diss., 2008
106

Synthese und Untersuchung konjugierter metallorganischer Hybridpolymere durch ADMET-Polymerisation

Weychardt, Holger. Unknown Date (has links) (PDF)
Darmstadt, Techn. Universiẗat, Diss., 2008.
107

Transparent organic light emitting diodes for active matrix displays

Meyer, Jens January 2008 (has links)
Zugl.: Braunschweig, Techn. Univ., Diss., 2008
108

Chemische Prozesse der OLED-Degradation

Scholz, Sebastian January 2008 (has links)
Zugl.: Dresden, Techn. Univ., Diss., 2008
109

Ladungstransportschichten für effiziente organische Halbleiterbauelemente

Colsmann, Alexander January 2008 (has links)
Zugl.: Karlsruhe, Univ., Diss., 2008 / Hergestellt on demand
110

Anwendungen und Marktpotenziale einer neuen Displaytechnologie am Beispiel OLED

Näf, Michael. January 2008 (has links) (PDF)
Bachelor-Arbeit Univ. St. Gallen, 2008.

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