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一个单核聚合多共振热激活延迟光发射器,使高效和超窄带红色电发光成为可能

Tianjiao Fan¹, Qiwei Liu², Xudong Cao³

¹Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China.

Journal of the American Chemical Society

|March 5, 2026

概括

研究人员开发了一种新的红色发射器,α-NAICZ-BN,实现了高效率和狭窄的光谱宽度,用于先进的显示器. 这一突破克服了先前在红色有机发光二极管的合成产量和激子利用方面的局限性.

科学领域:

材料科学材料科学材料科学
有机电子有机电子
光物理学的光学物理学

背景情况:

开发高效的窄带红色发射器对于下一代显示器至关重要.
现有的材料面临着合成产量,光谱纯度和激子利用之间的权衡.
多重共振热激活延迟光 (MR-TADF) 为高效的发射提供了一个有希望的途径.

研究的目的:

设计和合成一个高产,窄带红色MR-TADF发射器.
为了克服同时高合成产量,狭窄的光谱线宽度和高刺激子利用率的局限性.
为高性能红色MR-TADF材料建立一个新的分子设计范式.

主要方法:

分子设计结合了来自不同的窄带系统的结构动图.
一个单化MR-TADF发射物的合成,α-NAICZ-BN.
在有机发光二极管 (OLED) 溶液和设备制造中的光物理特性.

主要成果:

α-NAICZ-BN在605nm处表现出高效的红色发射,在半最大 (fwhm) 时的全宽度为26nm,这是单核红色MR-TADF发射器的创纪录.
相应的OLED在617nm以CIE坐标 (0.67,0.33) 实现了窄带红色电发光.
该设备的最大外部量子效率为29.5%,功率效率为53.1 lm W-1,效率回转率微不足道.

结论:

开发的分子设计成功地打破了红色发射器在效率和光谱纯度之间的权衡.
单分子框架可以同时实现特殊的颜色纯度和高设备效率.
本文介绍了用于高级显示应用的高性能红色MR-TADF材料的新设计策略.

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