| 학회 |
한국공업화학회 |
| 학술대회 |
2014년 가을 (11/12 ~ 11/14, 엑스코(대구)) |
| 권호 |
18권 2호 |
| 발표분야 |
정보전자소재-포스터 |
| 제목 |
Structure-Property Relationship Between EW-Substituent Character and Deep-Blue-Phosphorescent Iridium(III) Complex for Highly Efficient and Stable PHOLEDs |
| 초록 |
The non-radiative decay of the high energy triplet state of a series of Ir(III)-complexes associated with the cleavage of one M–L bond was examined by integrating quantum chemical modeling methods and various experimental techniques. Quantum chemical models suggest that the deep blue phosphorescence originates mainly from a 3MLCT excited state. A chemical pathway for the non-radiative decay of the 3MLCT involving a M–L bond cleavage is explicitly modeled and complete reaction cycles were constructed. Heteroleptic complexes were prepared by employing acetylacetonate (acac), picolinate (pic) and tetrakis-pyrazolyl borate (bor) as ancillary ligands to investigate the stability of the emissive triplet state. A detailed analysis of the computational model and time-resolved luminescence experiments suggest that a combination of electronic effects and the bulkiness of the borate ancillary ligand protect the radiative excited state from non-radiative decay. Finally, developed Ir(III)-complexes were tested as dopants in prototype phosphorescent organic light-emitting diode devices and found to show deep blue electroluminescence with high emission efficiency and color purity. |
| 저자 |
오태훈1, 조양진1, 한원식2, 손호진1, 강상욱1
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| 소속 |
1고려대, 2서울여자대 |
| 키워드 |
MLCT; PHOLED
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| E-Mail |
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