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在使用热激发机制处理可溶液的深蓝色有机发光二极管中实现了11.5%的记录外部量子效率

Wenhui Wang¹, Jinkun Bian¹, Kaijin Chen¹

¹PCFM Lab, Guangdong Engineering Technology Research Centre for High-performance Organic and Polymer Photoelectric Functional Films, GBRCE for Functional Molecular Engineering, GD HPPC Lab, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, IGCME, Sun Yat-sen University, Guangzhou, 510275, P. R. China.

Angewandte Chemie (International ed. in English)

|February 14, 2024

概括

研究人员为显示器开发了新的深蓝色发射器. 这些可溶液加工的材料实现了高效率和色彩纯度,克服了以前深蓝色有机发光二极管 (OLED) 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:

高性能,可处理溶液的深蓝色发射器对于超高清显示器至关重要.
现有的深蓝色材料具有混合局部和电荷转移 (HLCT) 激发状态,由于刚性和平面结构,往往缺乏有效处理溶液的必要性质.

研究的目的:

设计和合成新的深蓝溶液可加工的发射器,以提高显示应用的性能.
为了研究结合刚性 imide 形环对 HLCT 发射器性能的影响.

主要方法:

合成了四个新的深蓝色发射器,通过将刚性伊米德形环连接到HLCT发射核心.
使用这些新型发射器制造和特征化可处理溶液的有机发光二极管 (OLED).
评估的设备性能,包括外部量子效率 (EQE),排放峰值,颜色纯度和国际照明委员会 (CIE) 坐标.

主要成果:

新型发射器具有增强的可溶性,热性能和形态稳定性.
光发光效率得到了提高,电荷载体运输得到了平衡,聚合引起的火被抑制.
制造的OLED实现了11.5%的最大外部量子效率 (EQEmax),其发射峰值为456nm,颜色纯度很好 (CIEy=0.09).
这些结果代表了使用"热刺激"机制处理可溶液的蓝色OLED的最先进性能.

结论:

通过将刚性 imide 形环连接在一起的策略,可以有效地提高深蓝色 HLCT 发射器在溶液加工中的性能.
这种方法为开发高效,可处理溶液的深蓝色有机发光材料提供了一条新的途径,用于先进的显示技术.

关键词:

亚利法式的伊米德环.混合局部和电荷转移 (HLCT)狭带蓝色辐射是一种狭带蓝色辐射.氨酸是什么? 氨酸是什么? 烯是什么?可以处理的解决方案-可加工.

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