Chromenopyrazole-based bipolar host materials for solution-processable thermally activated delayed fluorescence OLEDs exhibiting high efficiency and low roll-off

文献情報

出版日 2019-10-02

DOI 10.1039/C9CC05983K

インパクトファクター 6.222

著者

Mallesham Godumala, Jiwon Yoon, Chiho Lee, Ji-Eun Jeong, Sungnam Park, Han Young Woo, Min Ju Cho, Dong Hoon Choi

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要旨

This study reports the design, synthesis, and characterization of two new bipolar host materials, DCzCP and TCzCP. Both materials were implemented as hosts by doping a known green thermally activated delayed fluorescent (TADF) emitter (t4CzIPN) in solution-processable OLEDs. DCzCP-based devices afford the best performance with the maximum external quantum efficiency (EQE) of 21.2%. Notably, the EQE was maintained at 20.7% and 19.7% at a practical luminance of 500 cd m−2 and 1000 cd m−2, respectively, demonstrating very small roll-off.

掲載誌

Chemical Communications

CiteScore: 8.6

自己引用率: 4.7%

年間論文数: 2458

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