Emissive semi-interpenetrating polymer networks for ink-jet printed multilayer OLEDs

• Verfasst von: Kunz, Susanna [VerfasserIn]
• Verfasst von: Cole, Cameron M. [VerfasserIn]
• Verfasst von: Baumann, Thomas [VerfasserIn]
• Verfasst von: Sonar, Prashant [VerfasserIn]
• Verfasst von: Yambem, Soniya D. [VerfasserIn]
• Verfasst von: Blasco, Eva [VerfasserIn]
• Verfasst von: Barner-Kowollik, Christopher [VerfasserIn]
• Verfasst von: Blinco, James P. [VerfasserIn]
• Titel: Emissive semi-interpenetrating polymer networks for ink-jet printed multilayer OLEDs
• Verf.angabe: Susanna V. Kunz, Cameron M. Cole, Thomas Baumann, Prashant Sonar, Soniya D. Yambem, Eva Blasco and Christopher Barner-Kowollik, James P. Blinco
• Jahr: 2021
• Umfang: 7 S.
• Fussnoten: First published 20 Aug 2021 ; Gesehen am 12.10.2022
• Titel Quelle: Enthalten in: Polymer chemistry
• Ort Quelle: Cambridge : RSC Publ., 2010
• Jahr Quelle: 2021
• Band/Heft Quelle: 12(2021), 39, Seite 5567-5573
• ISSN Quelle: 1759-9962
• DOI: doi:10.1039/D1PY00794G
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1818812045

Abstract

Solution-processing of multilayered Organic Light Emitting Diodes (OLEDs) remains a challenge that is often addressed by cross-linking polymer precursors into insoluble networks. Herein, we blend an emissive polymer carrying a Thermally Activated Delayed Fluorescence (TADF) emitter and a host species with a photo-cross-linkable polymer containing ortho-methylbenzaldehyde and maleimide groups as reactive cross-linkers to form a Semi-Interpenetrating Polymer Network (SIPN) upon irradiation at 365 nm. The progress of the cross-linking via Diels-Alder [4 + 2]-cycloaddition is monitored by FT-IR-spectroscopy and is correlated with the solvent resistance of the SIPN. Furthermore, the influence of the molecular weight and the cross-linker content on the efficiency of the cross-linking are investigated. The resulting polymer films show a high solvent resistance evidenced by photoluminescence and AFM measurements and are thus suitable for a successive solution-processed layer. Furthermore, a comonomer carrying the commercial host molecule 1,3-bis(N-carbazolyl)benzene (mCP) was synthesized in high yields, copolymerized and integrated in the emissive SIPN with good resistance against organic solvents. Lastly, the polymer blends were processed with an ink-jet printer and turned into an insoluble SIPN.