Reduced Efficiency Roll-Off in Light-Emitting Diodes Enabled by Quantum Dot-Conjugated Polymer Nanohybrids
- Reduced Efficiency Roll-Off in Light-Emitting Diodes Enabled by Quantum Dot-Conjugated Polymer Nanohybrids
- 배완기; Jaehoon Lim; Matthias Zorn; Jeonghun Kwak; Young-Shin Park; Donggu Lee; Seonghoon Lee; Kookheon Char; Rudolf Zentel; Changhee Lee
- quantum dot; conducting polymer; organic-inorganic hybrids; roll-off
- Issue Date
- Journal of materials chemistry. C, Materials for optical and electronic devices
- VOL 2, NO 25, 4974-4979
- We demonstrate QLEDs implementing wider active layers (50 nm) based on QD–conducting polymer nanohybrids, which exhibit a stable operational device performance across a wide range of current densities and brightness. A comparative study reveals that the significant suppression of efficiency roll-off in the high current density regime is primarily attributed to a sufficient charge carrier distribution over the wider active layer and improved charge carrier balance within QDs enabled by the hybridization of QDs with conducting polymers. Utilization of this finding in future studies should greatly facilitate the development of high performance, stable QLEDs at high current density or luminance regime toward displays or solid-state lighting applications.
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