| 학회 | 한국공업화학회 |
| 학술대회 | 2022년 봄 (05/11 ~ 05/13, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 | 26권 1호 |
| 발표분야 | 포스터-디스플레이 |
| 제목 | Synthesis of CN-substituted dibenzofuran with high triplet energy as efficient blue TADF host through lowest unoccupied molecular orbital control |
| 초록 | A total of three n-type host materials were synthesized by adjusting the CN-substitution to dibenzofuran in the molecule structure based on dicyanocarbazole, benzonitrile, and dibenzofuran moieties. Depending on the controlled CN-uint attached to dibenzofuran, the three molecules have different lowest unoccupied molecular orbital (LUMO) distribution and these materials, which have a wide LUMO distribution as the number of CN-unit increases, have improved electron transport property and these are used as an n-type host in a mixed host blue thermally-activated delayed fluorescence (TADF) organic light emitting diode device system. In addition, these three host materials form a twisted molecular structure and have a high triplet energy of more than 3.0 eV. Two molecules that introduced CN-unit showed high EQE (19.3%) and 20% improvement in lifetime due to good electron transport property in blue TADF device, in line with the intention to have a wide LUMO distribution. |
| 저자 | 엄세정, 이준엽 |
| 소속 | 성균관대 |
| 키워드 | LUMO management; high triplet energy; n-type host; CN unit; electron transport property |
