journal article·2008-10-09Open access

Optimization of Orange‐Emitting Electrophosphorescent Copolymers for Organic Light‐Emitting Diodes

Andreas Haldi, Alpay Kimyonok, Benoit Domercq, Lauren E. Hayden, Simon C. Jones, Seth R. Marder, Marcus Weck, Bernard Kippelen

Advanced Functional Materials· Volume 18· Issue 19

Abstract

Abstract Orange‐emitting phosphorescent copolymers containing iridium complexes and bis(carbazolyl)fluorene groups in their side chains are employed as the emissive layer in multilayer organic light‐emitting diodes (OLEDs). The efficiency of the OLED devices is optimized by varying characteristics of the copolymers: the molecular weight, the iridium loading level, and the nature and length of the linker between the side chains and the polymer backbone. A maximum efficiency of 4.9 ± 0.4%, 8.8 ± 0.7 cd A−1 at 100 cd m−2 is achieved with an optimized copolymer.
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Research context

OpenAlex topics: Organic Light-Emitting Diodes Research · Organic Electronics and Photovoltaics · Luminescence and Fluorescent Materials

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