| 학회 | 한국화학공학회 |
| 학술대회 | 2020년 가을 (10/14 ~ 10/16, e-컨퍼런스) |
| 권호 | 26권 1호, p.747 |
| 발표분야 | 재료 |
| 제목 | Efficiency Enhancement of Solution-Processed Inverted Quantum Dot Light-Emitting Diodes via Ligand Modification with 6-Mercaptohexanol |
| 초록 | The conventional hydrophobic oleic acid ligand can be damaged by hole transport layer (HTL) solvents such as chlorobenzene.[1] To prevent damage to the QD layer, Oleic acid ligand was partially substituted by hydrophilic 6-mercaptohexanol ligand via a ligand exchange process without losing any optical properties. The QD emitting layer (EML) maintained its integrity with the ligand exchange even after exposure to chlorobenzene, a typical HTL solvent, resulting in the efficiency enhancement of the all-solution-processed inverted QLEDs. Inverted QLEDs with a QD EML with OH-QDs performance was compared with that of inverted QLEDs with OA-QDs; the maximum current efficiency of the device with the OH-QDs considerably increased to 39.0 cd A-1 from 5.3 cd A-1, and simultaneously the peak external quantum efficiency increased to 9.3% from 1.2%. This work is expected to provide effective solutions for producing efficient all-solution-processed inverted QLEDs. [1] K. Lee, C. Han, E. Jang, J. Jo, S. Hong, J. Hwang, E. Choi, J. Hwang and H. Yang, , “Full-color capable light-emitting diodes based on solution-processed quantum dot layer stacking”, Nanoscale, 10, 6300 (2018) |
| 저자 | 최용혁, 이우석, 채희엽 |
| 소속 | 성균관대 |
| 키워드 | 화공재료 |
| 원문파일 | 초록 보기 |
