| 학회 | 한국공업화학회 |
| 학술대회 | 2021년 봄 (05/12 ~ 05/14, 부산 벡스코(BEXCO)) |
| 권호 | 25권 1호 |
| 발표분야 | 포스터-디스플레이 |
| 제목 | A study on the characteristics of OLED devices according to the position of nitrogen atoms in a pyridine based host with high triplet energy |
| 초록 | The triplet energy of the dopant required for blue OLED is basically 2.7 eV or more. oCBP, known as a material with high triplet energy, has a high value of 3.18 eV. Accordingly, it is expected that pyridine, an e-withdrawing group, is introduced instead of phenyl to maintain a high triplet and to control the mobility of electrons and holes to improve device performance. In this study, 2N-oCBP(9-(3-(2-(9H-carbazol-9-yl)phenyl)pyridine-4-yl)-9H-carbazole), 4N-oCBP(9-(3-(2-(9H-carbazol-9-yl)phenyl)pyridine-2-yl)-9H-carbazole)were synthesized by introducing nitrogen containing pyridine at positions 2 and 4. When applied to OLED devices, oCBP, 2N-oCBP, and 4N-oCBP exhibited efficiencies of 16.5%, 15.7%, and 15.2%, respectively, and it was confirmed that the reduction in driving voltage and efficiency roll-off were improved. |
| 저자 | 장혁우, 하태훈, 이칠원 |
| 소속 | 단국대 |
| 키워드 | OLED; TADF; Blue; Host |
