Emissive semi-interpenetrating polymer networks for ink-jet printed multilayer OLEDs
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 specie...
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| Main Authors: | , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2021
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| In: |
Polymer chemistry
Year: 2021, Volume: 12, Issue: 39, Pages: 5567-5573 |
| ISSN: | 1759-9962 |
| DOI: | 10.1039/D1PY00794G |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1039/D1PY00794G Verlag, lizenzpflichtig, Volltext: https://pubs.rsc.org/en/content/articlelanding/2021/py/d1py00794g 
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| Author Notes: | Susanna V. Kunz, Cameron M. Cole, Thomas Baumann, Prashant Sonar, Soniya D. Yambem, Eva Blasco and Christopher Barner-Kowollik, James P. Blinco |
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| 520 | |a 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. | ||
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| 700 | 1 | |a Baumann, Thomas |e VerfasserIn |4 aut | |
| 700 | 1 | |a Sonar, Prashant |e VerfasserIn |4 aut | |
| 700 | 1 | |a Yambem, Soniya D. |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Barner-Kowollik, Christopher |e VerfasserIn |4 aut | |
| 700 | 1 | |a Blinco, James P. |e VerfasserIn |4 aut | |
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