研究目的
Improving the performance of red-emitting CsPbI3 Pe-QLEDs through material modification and device structure design to achieve high external quantum efficiency, low efficiency roll-off, and high luminance.
研究成果
The introduction of zirconium acetylacetonate significantly improved the optical and electronic properties of CsPbI3 QDs, leading to high-performance Pe-QLEDs with a peak EQE of 13.7%, low efficiency roll-off, and high luminance. The top-emitting device structure further enhanced light extraction efficiency and device stability.
研究不足
The study focuses on red-emitting Pe-QLEDs, and the findings may not be directly applicable to other colors. The long-term stability under operational conditions beyond the tested parameters remains to be investigated.
1：Experimental Design and Method Selection:
The study involved the synthesis of CsPbI3 QDs modified with zirconium acetylacetonate to passivate surface traps and regulate recombination rates. A top-emitting device structure was designed to enhance light extraction efficiency through microcavity resonance.
2：Sample Selection and Data Sources:
CsPbI3 QDs were synthesized with different Pb:Zr ratios. The optical and electronic properties of these QDs were characterized using various spectroscopic and microscopic techniques.
3：List of Experimental Equipment and Materials:
Equipment included TEM, XRD, XPS, UPS, and devices for measuring PL QY and EL characteristics. Materials included CsPbI3 QDs, zirconium acetylacetonate, and components for LED fabrication.
4：Experimental Procedures and Operational Workflow:
The synthesis of QDs, fabrication of LEDs, and characterization of their optical and electronic properties were carried out systematically. The performance of the LEDs was evaluated under different conditions.
5：Data Analysis Methods:
Data from spectroscopic and device performance measurements were analyzed to understand the effects of zirconium modification and device structure on LED performance.
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