| 학회 |
한국고분자학회 |
| 학술대회 |
2019년 가을 (10/09 ~ 10/11, 제주컨벤션센터) |
| 권호 |
44권 2호 |
| 발표분야 |
분자전자 부문위원회 II |
| 제목 |
Development of Deep-Red to NIR emitting tris-Heteroleptic Iridium(III) Complexes for Solution-Processable Organic Light-Emitting Diodes |
| 초록 |
NIR emitting luminophores have critical challenges because of the vulnerability of the small emissive band gap towards several non-radiative decay pathways including overlap of ground and excited state vibrational energies, high frequency oscillators. In order to probe the effects of electron-withdrawing and donating substituents anchored on the quinoline moiety of (benzo[b]thiophen-2-yl) quinoline cyclometalating ligands, we synthesis deep-red to NIR emitting iridium(III) complexes. We experimented photophysical studies in solution, doped polymer film, powder and at 77 K to examine the effects of substitution on the excited state characteristics with DFT and TD-DFT calculations. Measurement in doped polymer films, the -CH3 substituted (Ir1), unsubstituted (Ir2) and -CF3 substituted complex (Ir4) were represented high phosphorescence quantum efficiency. We fabricated unoptimized deep-red to NIR OLED device by solution processing. The maximum EQE values were 2.05% (Ir1) and 2.11% (Ir2). |
| 저자 |
김태현, 김해운, 김도현, 정다솔, 최예림, 박태호
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| 소속 |
POSTECH |
| 키워드 |
OLED; Iridium complex; Solution process; NIR emitting; Phosphorescence
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| E-Mail |
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