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| Type |
Oral Presentation |
| Area |
Oral Presentation of Young Material Chemists |
| Room No. |
Room 405+406 |
| Time |
THU 09:12-09:24 |
| Code |
MAT.O-2 |
| Subject |
Iridium(III) Complexes for Deep-Red to Near-Infrared Phosphorescent Solution-Processable Organic Light-Emitting Diodes |
| Authors |
Hae Un Kim, Seyeong Lim, Dohyun Kim, Dasol Chung, Jihyun Min, Taiho Park*
Department of Chemical Engineering, Pohang University of Science and Technology, Korea
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| Abstract |
Research on materials and devices emitting near-infrared- (NIR-) wavelength has been driven by several application requirements. However, the development of luminophores posessing efficient, stable, low-cost NIR emission is still a challenge. Herein, in order to investigate the effects of electron-withdrawing and -donating substituents fixed on the quinoline moiety of (benzo[b]thiophen-2-yl)quinoline cyclometalating ligands, we developed a series of deep-red to NIR emitting iridium(III) complexes. We conducted a photophysical study at the excited-state in the solution, powder, doped polymer film and frozen matrix states to examine the effects of substitution. In doped polymer films, the –CH3 substituted, unsubstituted and –CF3 substituted complex were promising compounds with high phosphorescence quantum efficiency. The unoptimized device using a solution-processable method showed maximum external quantum efficiency (EQE) value of 2.11%. |
| E-mail |
hukim@postech.ac.kr |
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123rd General Meeting of the KCS