Orthogonally Processable Carbazole-Based Polymer Thin Films by Nitroxide-Mediated Polymerization
| Autor: | Owen A. Melville, Benjamin T. King, Christian J. Imperiale, Benoît H. Lessard |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Nitroxide mediated radical polymerization Materials science Carbazole 02 engineering and technology Surfaces and Interfaces Polymer Substrate (electronics) 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Indium tin oxide chemistry.chemical_compound Chemical engineering chemistry Polymerization Polymer chemistry Electrochemistry Copolymer General Materials Science Thin film 0210 nano-technology Spectroscopy |
| Zdroj: | Langmuir. 32:13640-13648 |
| ISSN: | 1520-5827 0743-7463 |
| Popis: | Cross-linking of hole-transporting polymer thin films in organic light emitting diodes (OLEDs) has been shown to increase device efficacy when subsequent layers are deposited from solution. This improvement, due to resistance of the films to dissolution, could also be achieved by covalently grafting the polymer film to the substrate. Using nitroxide-mediated polymerization (NMP), we synthesized a novel poly(9-(4-vinylbenzyl)-9H-carbazole) (poly(VBK)) copolymer which can be cross-linked and also developed two simple methods for the grafting-to or grafting-from, also known as surface-initiated polymerization, of poly(VBK) to indium tin oxide (ITO) substrates. All three of these methods produced thin films that could be orthogonally processed; that is, they resisted dissolution when the spin-coating of a subsequent layer was simulated. Similar electrochemical behavior for the poly(VBK) films was observed regardless of the technique used, suggesting that all three techniques could be used in the engineering of organic electronic devices. We expect that all three methods would be worth investigating in the solution-based assembly of OLEDs and other organic electronic devices. |
| Databáze: | OpenAIRE |
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