Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 12, Issue 25, Pages 5967-5978Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.1c01554
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Funding
- Key R&D Program of Guangdong Province [2020B010189001, 2019B010931001, 2018B030327001]
- National Natural Science Foundation of China [52025023, 51991342, 52021006, 11888101, 61874039, 61922028]
- Strategic Priority Research Program of Chinese Academy of Sciences [XDB33000000]
- Beijing Natural Science Foundation [JQ19004]
- Beijing Excellent Talents Training Support [2017000026833ZK11]
- Pearl River Talent Recruitment Program of Guangdong Province [2019ZT08C321]
- China Postdoctoral Science Foundation [2020M680177]
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With the development of cg-QDs, significant progress has been made in the application of LED in the field of QLED, focusing on the synthesis and advantages to effectively solve a series of challenges faced by QLED. Future research will focus on methods to further optimize and improve the performance of QLEDs.
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.
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