| 학회 | 한국공업화학회 |
| 학술대회 | 2022년 봄 (05/11 ~ 05/13, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 | 26권 1호 |
| 발표분야 | 포스터-디스플레이 |
| 제목 | Exploration of excited-state properties for structural isomers of homoleptic NHC-Ir(III) complexes bearing dibenzothiophene analogous and their application to blue PhOLEDs |
| 초록 | The NHC–Ir complexes f-IrSiPr, m-IrSiPr, and m-IrSMe, in which adibenzothiophene (DBT) moiety is used to increase the emission efficiency fordeep-blue phosphorescence, were synthesized and compared with the dibenzofuran(DBF)-based Ir complexes f-IrOMe and m-IrOMe. The differences in the ligand structure(DBF/DBT) or configuration (fac/mer) of these complexes led to different electrochemical andphotophysical properties. The DBF moiety has a stronger electronegativity than DBT,resulting in a larger T1–S0 energy gap and a shorteremission wavelength than those of the DBT complexes. Even with the differences inthe origin of phosphorescence, replacement of the oxygen atom in the DBF unitwith sulfur does not greatly alter the emission efficiency in either solutionor film while achieving the same high-end deep-blue phosphorescence withunprecedented CIE coordinates of [0.14, 0.19] for m-IrSMe (EQE; 17.1%) and[0.14, 0.14] for m-IrOMe (EQE; 18.2%). |
| 저자 | 김소연, 윤보선, 김진형, 강상욱, 손호진 |
| 소속 | 고려대 |
| 키워드 | NHC-Ir complex; blue emitter; OLED |
