Photo-Cross-Linkable Polyfluorene–Triarylamine (PF–PTAA) Copolymer Based on the [2 + 2] Cycloaddition Reaction and Its Use as Hole-Transport Layer in OLEDs

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• 作者：Markus Bender ; Korwin M. Schelkle ; Nils Jürgensen ; Stefanie Schmid ; Gerardo Hernandez-Sosa ; Uwe H. F. Bunz
• 刊名：Macromolecules
• 出版年：2016
• 出版时间：April 26, 2016
• 年：2016
• 卷：49
• 期：8
• 页码：2957-2961
• 全文大小：365K
• 年卷期：0
• ISSN：1520-5835

文摘

We report the synthesis and characterization of a cross-linkable, cinnamic acid functionalized, hole-transporting polyfluorene–triarylamine (PF–PTAA) copolymer. Irradiation with light induces [2 + 2] cycloaddition and renders thin films of this polymer insoluble. Spin-coated films of the polymer and their light-induced cross-linking were investigated by atomic force and electron microscopy. In a proof-of-principle multilayer OLED device the polymer was applied as hole-transport layer (HTL) with commercially available F8BT as emitting layer (EML). Compared to the reference device without HTL we observe a significant increase in OLED performance. These results promise progress in cost-effective large area fabrication of polymer-based multilayer OLEDs with superior performance.