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제114회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Rationally optimizing the performance of deep blue phosphorescent materials: A combined computational and experimental study of iridium(III)-based triplet emitters [우수포스터상]

등록일
2014년 8월 28일 16시 52분 00초
접수번호
1313
발표코드
IND.P-111 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 15일 (수요일) 16:00~19:00
발표형식
포스터
발표분야
공업화학
저자 및
공동저자
오태훈, 강상욱1,*, 손호진1, 조양진1, 한원식2, 조대원3
고려대학교 세종캠퍼스 소재화학, Korea
1고려대학교 소재화학과, Korea
2서울여자대학교 화학과, Korea
3고려대학교 세종캠퍼스 신소재화학과, Korea
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.

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