220 V / 50 Hz兼容双极量子点发光二极管
Heng Zhang1,2, Jiming Wang1,3, Shuming Chen1
1Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, 518055, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|January 18, 2024
概括
研究人员使用一种新的双极设计开发了高性能交流电驱动的量子点发光二极管 (QLED). 这些AC-QLED可以直接由家庭电力供电,提供稳定而明亮的固态照明解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 光电学是指光电子产品.
背景情况:
- 与直流 (DC) 设备相比,使用交流电 (AC) 驱动的量子点发光二极管 (QLED) 在稳定性和与家庭电力直接集成方面具有优势.
- 在AC驱动的QLED中实现高性能仍然是实际应用的重大挑战.
研究的目的:
- 开发高性能交流驱动的QLED,能够与家庭交流电源直接集成.
- 探索新的设备架构,以实现高效的AC-QLED操作.
主要方法:
- 双极QLED的制造方法是连接一个正规的QLED和一个倒置的QLED,并使用 (Al) 桥梁层的共平面电极设计连接.
- 通过用银 (Ag) 取代Al来降低电子传输层阻力来研究设备的性能.
- 探索了正规和倒置的QLEDs与金属中间层的垂直堆叠.
- 通过220 V/50 Hz家庭电源直接驱动多个双极QLED的连接.
主要成果:
- 实现了双极QLED,其高外部量子效率 (EQE) 为22.9%.
- 将Al替换为Ag使亮度提高到16370cdm-2在15V下,因为电阻降低.
- 成功展示了由家庭交流电源直接驱动的AC-QLED,没有外部电子设备.
结论:
- 开发的双极QLED,在共平面和垂直配置,代表了AC驱动的QLED技术的重大进步.
- 这些设备显示出用于使用家用交流电的插即用固态照明和先进显示应用的巨大潜力.
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