| 학회 |
한국고분자학회 |
| 학술대회 |
2015년 봄 (04/08 ~ 04/10, 대전컨벤션센터) |
| 권호 |
40권 1호 |
| 발표분야 |
대학원생 구두발표 (영어발표, 발표15분) |
| 제목 |
Phosphorescent dye-based supramolecules for high-efficiency organic light-emitting diodes |
| 초록 |
The preferred orientation of transition dipole moments has not been thoroughly considered for phosphorescent Organic light-emitting diodes (OLEDs) because of the lack of an apparent driving force for a molecular arrangement in all but a few cases, even though horizontally oriented transition dipoles can result in efficiencies of over 30%. Here, we used quantum chemical calculations to show that the preferred orientation of the transition dipole moments of heteroleptic iridium complexes (HICs) in OLEDs originates from the preferred direction of the HIC triplet transition dipole moments and the strong supramolecular arrangement within the co-host environment. We also demonstrated an unprecedentedly high EQE of 35.6% for for red-emitting HICs and 32.3% for for green-emitting HICs when using HICs with phosphorescence transition dipole moments oriented in the horizontal direction. |
| 저자 |
김권현1, 문창기1, 이정환1, 이진우2, 허준3, 유영민4, 김장주1
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| 소속 |
1서울대, 2삼성토탈, 3고려대, 4경희대 |
| 키워드 |
OLED; orientation of transition dipoles; phosphorescent dye; Ir complex
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| E-Mail |
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