| 학회 | 한국공업화학회 |
| 학술대회 | 2022년 봄 (05/11 ~ 05/13, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 | 26권 1호 |
| 발표분야 | 포스터-디스플레이 |
| 제목 | Photophysical Properties of 9,9-Dimethylfluorene-based Ir(III) Complexes According to Various Types of Heterocyclic Compounds for Efficient Blue PhOLEDs |
| 초록 | A series of Ir(III) complexes (fac-Ir(py),fac-Ir(pz), fac-/mer-Ir(im), and fac-/mer-Ir(bzim))with 9,9-dimethylfluorenyl (dmf)-based ligands tuned with various heterocyclicchelating moieties (pyridyl (py), pyrazolyl (pz), imidazolyl (im), andbenzimidazolyl (bzim)) were prepared and investigated for the development ofnovel efficient blue phosphorescent dopants. The photophysical analysis confirmedthat the emission colors were tunable from λem= 545 nm (fac-Ir(py)) to λem= 462 nm (fac-Ir(bzim))depending on the heterocycle type. From DFT/TD-DFT calculations andelectrochemical analysis, we found that the structural distortion (ΔQe)affects the quantum efficiencies and radiative rate constants of the Ir(III)complexes, which is related to the electroluminescence performance. The mer-Ir(im)and fac-/mer-Ir(bzim) with high emission quantumyields of ≥85% in the film state were evaluated as dopant materials in bluePhOLEDs. |
| 저자 | 김소연, 윤보선, 김진형, 이상훈, 강상욱, 손호진 |
| 소속 | 고려대 |
| 키워드 | hetero aryl system; blue emitter |
