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Emissive semi-interpenetrating polymer networks for ink-jet printed multilayer OLEDs
Polymer Chemistry ( IF 4.1 ) Pub Date : 2021-08-20 , DOI: 10.1039/d1py00794g Susanna V. Kunz 1 , Cameron M. Cole 1 , Thomas Baumann 2 , Prashant Sonar 1 , Soniya D. Yambem 1 , Eva Blasco 3, 4, 5 , Christopher Barner-Kowollik 1, 5 , James P. Blinco 1
Polymer Chemistry ( IF 4.1 ) Pub Date : 2021-08-20 , DOI: 10.1039/d1py00794g Susanna V. Kunz 1 , Cameron M. Cole 1 , Thomas Baumann 2 , Prashant Sonar 1 , Soniya D. Yambem 1 , Eva Blasco 3, 4, 5 , Christopher Barner-Kowollik 1, 5 , James P. Blinco 1
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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.
中文翻译：
用于喷墨印刷多层 OLED 的发光半互穿聚合物网络
多层有机发光二极管 (OLED) 的溶液处理仍然是一个挑战，通常通过将聚合物前体交联成不溶性网络来解决。在此，我们将携带热活化延迟荧光 (TADF) 发射体的发光聚合物和主体物质与含有邻甲基苯甲醛和马来酰亚胺基团的可光交联聚合物混合作为反应性交联剂，形成半互穿聚合物网络（ SIPN) 在 365 nm 照射下。通过交联的进展Diels-Alder [4 + 2]-环加成由 FT-IR 光谱监测，并与 SIPN 的耐溶剂性相关。此外，研究了分子量和交联剂含量对交联效率的影响。所得聚合物薄膜显示出高耐溶剂性，由光致发光和 AFM 测量证明，因此适用于连续的溶液处理层。此外，以高产率合成了一种带有商业主体分子 1,3-双( N-咔唑基)苯 (mCP)的共聚单体，共聚并集成在发射 SIPN 中，对有机溶剂具有良好的耐受性。最后，聚合物共混物用喷墨打印机处理并变成不溶性 SIPN。
更新日期：2021-08-24
中文翻译：
用于喷墨印刷多层 OLED 的发光半互穿聚合物网络
多层有机发光二极管 (OLED) 的溶液处理仍然是一个挑战，通常通过将聚合物前体交联成不溶性网络来解决。在此，我们将携带热活化延迟荧光 (TADF) 发射体的发光聚合物和主体物质与含有邻甲基苯甲醛和马来酰亚胺基团的可光交联聚合物混合作为反应性交联剂，形成半互穿聚合物网络（ SIPN) 在 365 nm 照射下。通过交联的进展Diels-Alder [4 + 2]-环加成由 FT-IR 光谱监测，并与 SIPN 的耐溶剂性相关。此外，研究了分子量和交联剂含量对交联效率的影响。所得聚合物薄膜显示出高耐溶剂性，由光致发光和 AFM 测量证明，因此适用于连续的溶液处理层。此外，以高产率合成了一种带有商业主体分子 1,3-双( N-咔唑基)苯 (mCP)的共聚单体，共聚并集成在发射 SIPN 中，对有机溶剂具有良好的耐受性。最后，聚合物共混物用喷墨打印机处理并变成不溶性 SIPN。
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