| 학회 |
한국고분자학회 |
| 학술대회 |
2018년 가을 (10/10 ~ 10/12, 경주컨벤션센터) |
| 권호 |
43권 2호 |
| 발표분야 |
분자전자 부문위원회 II |
| 제목 |
Deep-Red to Near Infrared Phosphorescence Engineered from tris-Heteroleptic IridiumIII Complexes using substituent effects for solution processable PhOLEDs |
| 초록 |
The development of highly efficient, stable, and low-cost NIR emitting luminophores is still a formidable challenge due to the vulnerability of the emissive band gap towards several nonradiative decay pathways.1-2 Suitable structural design is essential to address these issues effectively to produce intense emission. We developed a series of deep-red to near infra-red emissive iridium(III) complexes (Ir1 – Ir4) to explore the effects of electron-withdrawing and electron-donating substituents anchored on the quinoline moiety of (benzo[b]thiophen-2-yl) quinoline cyclometalating ligands. We also performed an in-depth and comparative photophysical study in the solution, doped polymer film and at 77K to investigate the effects of the substitution on the excited state properties. Using these novel molecules deep red to NIR OLEDs fabricated by solution processable method. The unoptimized device exhibit a maximum EQE of 2.05% and 2.11% for Ir1 and Ir2, respectively. |
| 저자 |
BEJOY MOHAN DAS K S1, 김민준2, 김해운2, 박성진2, 이대환2, 박태호2
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| 소속 |
1Pohang Univ. of Science and Technology, 2Postech |
| 키워드 |
Deep-red; Near Infrared; PhOLED; Substituent effects
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| E-Mail |
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