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蓝色量子点发光二极管使用易斯基混合孔传输层的增强性能和高耐效降解

Yuyu Liu¹, Minming Yan², Jia Shu¹

¹School of Semiconductor Science and Technology, South China Normal University, Guangzhou 510631, P. R. China.

ACS applied materials & interfaces

|December 22, 2023

概括

研究人员改进了蓝色量子点发光二极管 (QLED) 通过向孔输送层 (HTL) 添加1,2-bis(diphenylphosphino) 乙 (DPPE). 这种混合物提高了效率并减少了降解,克服了注入障碍,以提高设备性能.

科学领域:

材料科学材料科学材料科学
有机电子有机电子
量子点技术量子点技术是一种量子点技术.

背景情况:

由于高孔注入障碍,蓝色量子点 (QD) 在QLED中面临性能问题.
不平衡的载体运输和注射导致效率降低和设备退化.

研究的目的:

为了制造高效率,低降解的蓝色QLED.
为了改善基于QD的设备中的孔注入和载体平衡.

主要方法:

将1,2-bis(diphenylphosphino) 乙烯 (DPPE) 作为易斯基纳入聚9-乙烯基碳醇 (PVK) 孔输送层 (HTL).
优化DPE:PVK的混合比,以提高设备的性能.
分析DPE对充电屏障和QD-HTL接口的影响.

主要成果:

最佳4重%的DPE:PVK HTL将开启电压从3.21V降低到2.9V.
最大电流效率从2.92增加到5.75cdA-1 ,EQE从5.89%增加到11.75%.
使用DPE:PVK的QLED显示出卓越的稳定性,在高亮度下保持8.83%的EQE,而整洁的PVK则保持2.80%.

结论:

DPPE 作为双酸联体,合金属离子并改善 HTL-QD 接触.
DPPE:PVK混合物有效地降低了电荷障碍,并增强了孔注入.
这一战略为高性能和稳定的蓝色QLED提供了可行的途径.

关键词:

易斯基地 DPPE 的 DPPE 蓝色的量子点是蓝色的量子点.效率滚动取消效率滚动孔运输层是孔运输层.发光二极管是一种发光二极管.

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