| 학회 |
한국고분자학회 |
| 학술대회 |
2019년 가을 (10/09 ~ 10/11, 제주컨벤션센터) |
| 권호 |
44권 2호 |
| 발표분야 |
분자전자 부문위원회 II |
| 제목 |
Chromenopyrazole Based Bipolar Host Materials for Solution Processable Thermally Activated Delayed Fluorescent OLEDs Exhibiting High Efficiency and Low Roll-off |
| 초록 |
Development of high performing host materials particularly for solution-processable OLEDs remains as a key challenge because of the difficulties in the simultaneous achievement of high solubility and high triplet energy. Herein, we present the design, synthesis, and characterization of two new highly soluble chromenopyrazole based bipolar host materials. The comprehensive investigations corroborate that both host materials execute high solubility, thermal stability along with excellent bipolar electronic properties. Consequently, both materials were implemented as hosts by adopting t4CzIPN as a TADF emitter in solution-processable OLEDs. Between these, the devices employing DCzCP as a host in the emissive layer bestow the state-of-the-art performance with maximum external quantum efficiency, power efficiency, and current efficiency to be 21.2%, 71.6 cd A-1 and 45.0 lm W-1, demonstrating very small efficiency roll-off. The detailed studies will be discussed during the poster session. |
| 저자 |
말라샴, 윤지원, 정지은, 우한영, 조민주, 최동훈
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| 소속 |
고려대 |
| 키워드 |
TADF; OLED; High performance
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| E-Mail |
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