| 학회 |
한국고분자학회 |
| 학술대회 |
2019년 가을 (10/09 ~ 10/11, 제주컨벤션센터) |
| 권호 |
44권 2호 |
| 발표분야 |
분자전자 부문위원회 II |
| 제목 |
Design and synthesis of novel deep-blue-emitting Ir complexes containing 2′,6′-difluoro-4-(trimethylsilyl)-2,3′-bipyridine(dfpysipy) ligand |
| 초록 |
We designed and synthesized novel deep-blue-emitting Ir complexes through engineering of the main ligand and ancillary ligand, where dfpysipy was used as the main ligand. Introduction of a trimethylsilyl group at the pyridine and a nitrogen at the difluoropyrido group in FIrpic increased the bandgap of the emitter by raising the LUMO level and lowering the HOMO level, resulting in deep-blue emission. Ancillary ligands (mpic, pic, and fptz) influenced the PLQYs (94% for mpic, 80% for pic, and 48% for fptz) by modifying the exciton lifetime, i.e., radiative and nonradiative decay rates, and the Θ in sequence of mpic (86%) ＞ fptz (77%) ＞ pic (74%). The OLED using the Ir complex with mpic ancillary ligand showed the highest EQE (31.9%) among the reported deep-blue OLEDs with CIE y ＜ 0.2. |
| 저자 |
하연희1, 신현2, 김현구2, 김란1, 권순기1, 김장주2, 김윤희1
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| 소속 |
1경상대, 2서울대 |
| 키워드 |
oled; deep blue emitting; Ir complex
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| E-Mail |
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