Continuously Graded Quantum Dots: Synthesis, Applications in Quantum Dot Light-Emitting Diodes, and Perspectives
| Autor: | Hao Hong, Muhong Wu, Huaibin Shen, Kaihui Liu, Haoyue Wan, Tianyu Liang, Yang Cheng, Can Liu |
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| Rok vydání: | 2021 |
| Předmět: |
Brightness
Materials science business.industry Band gap Electronic band 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Quantum dot law Optoelectronics General Materials Science High current Physical and Theoretical Chemistry 0210 nano-technology business Diode Light-emitting diode Voltage |
| Zdroj: | The Journal of Physical Chemistry Letters. 12:5967-5978 |
| ISSN: | 1948-7185 |
| Popis: | Colloidal quantum dot (QD) light-emitting diodes (QLEDs) hold the promise of next-generation displays and illumination owing to their excellent color saturation, high efficiency, and solution processability. For achieving high-performance light-emitting diodes (LEDs), engineering the fine compositions and structures of QDs is of paramount importance and attracts tremendous research interest. The recently developed continuously graded QDs (cg-QDs) with gradually altered nanocompositions and electronic band structures present the most advanced example in this area. In this Perspective, we summarize the current progress in LEDs based on cg-QDs, mainly concentrating on their synthesis and advantages in addressing the great challenges in QLEDs, like efficiency roll-off at high current densities, short operation lifetimes at high brightness, and low brightness near the voltage around the bandgap. In addition, we propose accessible approaches exploiting the cutting-edge mechanisms and techniques to further optimize and improve the performance of QLEDs. |
| Databáze: | OpenAIRE |
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