| 학회 |
한국공업화학회 |
| 학술대회 |
2019년 가을 (10/30 ~ 11/01, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 |
23권 2호 |
| 발표분야 |
포스터_디스플레이 |
| 제목 |
Development of blue phosphorescent materials for organic light-emitting diodes (OLEDs) with high efficiency |
| 초록 |
Two heteroleptic blue phosphorescent Ir(III) complexes were synthesized based on the main C^N chelate bipyridine ligands, with either a 4-positon (1) or 5-position (2) of bulky trimethylsilyl substituent, and acetylacetonate (acac) as an ancillary ligand. Their structure–electroluminescent property relationships were systematically investigated. The combination of trimethylsilyl substituent and acac ligand decreases the energy gap relative to the non-substituted counterpart: Ir(dfpypy)(acac), where dfpypy is 2-6-difluoro-2,3-bipyridine. Blue PHOLEDs which use both complexes as a dopant, and mCPPO1 as a host material, were fabricated successfully. Complex 1 had the highest performance among the reported blue PHOLEDs without co-host, making it an outstanding blue triplet emitter in PHOLEDs with over 30% of external quantum efficiency. Furthermore, the efficiency roll-off dramatically improved in the 1-based device. |
| 저자 |
강영진1, 자엔레나1, 이준엽2, 고가연1, 오충훈1, 윤지선1, 정현호1
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| 소속 |
1강원대, 2성균관대 |
| 키워드 |
청색인광; OLEDs; 양자효율; 고체상태
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| E-Mail |
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