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光染料敏感的量子点发光二极管具有37%的外部量子效率

Yanping Wang^1,2,3, Yusen Yang^1,3, Dingke Zhang⁴

¹School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022, P. R. China.

Advanced materials (Deerfield Beach, Fla.)

|September 18, 2023

概括

量子点发光二极管 (QLED) 使用刺激子敏感化方法实现更高的性能. 这种方法可以改善孔注入和能量传输,从而实现更亮,更高效的显示器.

科学领域:

材料科学材料科学材料科学
光电学是指光电子产品.
纳米技术纳米技术

背景情况:

在量子点发光二极管 (QLED) 中,激发子的采集至关重要.
由于量子点 (QD) 的能量带结构,QLED中的直接刺激收获受限于缺陷的孔注入,导致不平衡的电荷重组.
这种低效率阻碍了设备的最佳性能.

研究的目的:

为提高QLED性能引入一个激发感应策略.
为了克服QLED中直接激子采集的局限性.
展示QLED中高效的能量传输和光子发射的新方法.

主要方法:

红色QLED的制造采用激子敏感化方法.
将光染料, (III) 双2-甲基双-[f,h]素 (乙乙酸盐) [Ir(MDQ) 2 ((acac) ],添加到穿孔输送层中.
优化光染料兴奋剂度 (10重量%) 以最大限度地提高设备的效率.

主要成果:

优化的QLED实现了创纪录的高电流效率 (37.3 cd A-1),功率效率 (41 lm W-1),以及37%的外部量子效率 (EQE).
观察到效率滚动的显著改善,在高亮度 (450,000 cd m-2) 中保持35%的EQE.
制造的设备显示出良好的稳定性和可重复性.

结论:

激子敏感化方法通过促进高效的激子形成和能量转移,有效地提高了QLED的性能.
这一策略成功地解决了直接激素采集的局限性,从而实现了记录效率和改进的滚动特性.
开发的红色QLED显示出由于其高性能和稳定性而具有先进显示应用的有前途潜力.

关键词:

福斯特共振能量转移的能量转移.激发激发激发使人敏感化外部量子效率是指外部量子效率.量子点发光二极管是一种量子点发光二极管.解决方案加工 - 解决方案加工

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