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一种具有增强电荷注射平衡的新型交联孔输送层,用于高效的喷墨打印蓝色量子点式发光二极管

Liming Xie^1,2, Jinrong Shi², Ting Wang²

¹Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China.

ACS applied materials & interfaces

|September 4, 2024

概括

一个新的混合孔传输层 (HTL) 增强了蓝色量子点发光二极管 (QLED). 这种交叉连接的HTL可以改善带电平衡,稳定性和QLED的效率,无论是涂层还是喷墨打印QLED.

科学领域:

材料科学材料科学材料科学
有机电子有机电子
光电学是指光电子产品.

背景情况:

高性能和稳定的蓝色量子点发光二极管 (QLED) 对下一代显示器和照明至关重要.
开发高效的孔输送层 (HTL) 是优化QLED中充电注入,平衡和设备稳定性的关键.

研究的目的:

为高性能和稳定的蓝色QLED引入高效和强大的混合孔传输层 (HTL).
为了研究一个混合的HTL的特性,包括聚,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,.

主要方法:

合成并混合PF8Cz和FLCZ-V,形成HTL.
研究了FLCZ-V在热处理后的现场交叉连接行为.
描述了混合HTL的形态,电气和表面特性.
使用自旋涂层和喷墨打印技术与开发的HTL一起制造的蓝色QLED.

主要成果:

混合HTL表现出高孔移动性 (1.27 × 10−4 cm2/V·s) 和梯度HOMO水平,促进了孔注入.
交叉连接的HTL显示出出色的耐溶剂性和高表面能量 (40.34 mN/m),改善了湿透性和接口接触.
采用螺纹涂层的蓝色QLED实现了显著的15.5%的外部量子效率 (EQE).
喷墨打印的蓝色QLED达到9.2%的EQE,代表了这种制造方法的最先进性能.

结论:

开发的混合HTL显著提高了蓝色QLED的性能和稳定性.
在现场交叉连接策略提供了一个强大的和高效的HTL,适合各种制造方法,包括喷墨印刷.
这项工作为实现高效,解决方案处理的蓝色QLED提供了有希望的途径.

关键词:

蓝色的 QLED 显示器充电注入平衡是指一个充电注入平衡.可以交叉链接的可交叉链接孔的运输层是孔的运输层.喷墨印刷是一种喷墨印刷.

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