A simplified approach to thermally activated delayed fluorescence (TADF) bipolar host polymers
Literature Information
Susanna V. Kunz, Cameron M. Cole, Steven C. Gauci, Felicia Zaar, Paul E. Shaw, Chandana Sampath Kumara Ranasinghe, Thomas Baumann, Prashant Sonar, Soniya D. Yambem, Christopher Barner-Kowollik, James P. Blinco
Organic Light Emitting Diodes (OLEDs) are a critical part of current consumer electronics, from mobile device displays to solid-state lighting. Thus demand for the development of industrially compatible OLED materials continues to increase. Herein, we introduce a series of solution-processible polymers incorporating a Thermally Activated Delayed Fluorescence (TADF) emitter and a host species in the side chain to finely adjust the charge transport properties. For balanced charge transport, a bipolar host polymer based on carbazole and α-carboline was investigated in addition to the commonly employed unipolar host mCP and an electron transporting version thereof. We demonstrate that the combination of unipolar co-hosts on one polymer chain can generate, with less synthetic effort, the same optoelectronic properties as a polymer carrying the corresponding bipolar host molecule as a pendant.
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