| 학회 |
한국고분자학회 |
| 학술대회 |
2019년 가을 (10/09 ~ 10/11, 제주컨벤션센터) |
| 권호 |
44권 2호 |
| 발표분야 |
분자전자 부문위원회 II |
| 제목 |
High-Efficiency Deep Blue Phosphorescent Organic Light-Emitting Devices with EQE Over 24% by Incorporating a High Triplet Energy Bipolar Host Material |
| 초록 |
A new bipolar transport material of (4-(4-(9H-carbazol-9-yl)phenoxy)phenyl)di-o-tolylphosphine oxide (m-CDEPO) is designed and synthesized. Their thermal, photophysical and electrochemical properties are fully investigated. The bipolar compound of m-CDEPO consists of electron‐donating (D) and electron‐withdrawing (A) moieties are linked to both end sides of the spacer oxydibenzene system. Interestingly, a high ET of 3.02 eV is observed for m-CDEPO due to conjugation‐forbidden linkage. Furthermore, the new host material is incorporated in PHOLEDs as emissive layer with a new carbene type Ir(cb)3 material as a deep-blue emitter. The optimized devices show an external quantum efficiency (EQE) of 25% with a CIE (x, y) (0.137, 0.132) and high electroluminescence performance with extremely low efficiency roll-off. Overall, the above EQE is the highest reported for deep-blue PHOLEDs with very low efficiency roll-off |
| 저자 |
아티싼 마헤쉬와란1, 박호열1, 진성호1, 제갈영순2
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| 소속 |
1부산대, 2경일대 |
| 키워드 |
PHOLED; High EQE; Bipolar host material.
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| E-Mail |
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