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对于超窄频段深蓝色发射器,一个理想的分子构造策略:平衡色移位发射,光谱缩小和聚合抑制

Xiaofeng Luo¹, Qian Jin¹, Mingxu Du¹

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

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|December 31, 2023

概括

研究人员使用窄带多重共振 (MR) 发射器开发了新的深蓝色有机发光二极管 (OLED). 这些发射器实现了前所未有的光谱缩小和高效率,为先进的显示技术铺平了道路.

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:

窄带发射多重共振 (MR) 发射器对于高效和稳定的深蓝色有机发光二极管 (OLED) 至关重要.
在MR发射器中平衡深蓝色发射,光谱缩小和聚合抑制存在挑战.
在深蓝色MR发射器中实现超窄的光谱宽度仍然是一个重大障碍.

研究的目的:

设计和合成具有更好的光谱缩小和效率的新型深蓝色MR发射器.
为了应对MRI发射器中低色变化发射,光谱缩小和聚合抑制的挑战.
为了证明这些发射器在高性能OLED设备中的潜力.

主要方法:

使用DICz作为核心结构,以其在MR结构中最窄的全宽半最大 (FWHM) 结构而闻名.
调整了DICz核心的外围置换位点,以创建Cz-DICz分子.
使用合成的Cz-DICz发射器制造了OLED设备,并评估了它们的光发光和电光发光特性.

主要成果:

合成的Cz-DICz分子表现出明亮的深蓝色辐射 (峰值在457nm),溶液中的FWHM极小,为14nm.
OLED 设备实现了高的最大外部量子效率,范围从 22.1% 到 25.6%.
这些设备在实际的大规模生产度 (1-4 wt.%) 中保持了18nm的狭窄FWHM.

结论:

开发的Cz-DICz分子代表了窄带深蓝色MR发射器的重大进步.
获得的FWHM值 (光发光14nm,电发光18nm) 是深蓝MR发射器报告的最小值,具有相似的最大发射值.
这些发现有望推动高性能深蓝色发射器的开发,并彻底改变OLED行业.

关键词:

装修策略装修策略装修策略深蓝色的OLED显示器高效率和稳定的高效率和稳定性多重共振是一种多重共振.超窄频段的超窄频段

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