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高性能蓝色OLED使用多共振热激活延迟光宿主材料含有原子

Dongmin Park¹, Seokwoo Kang², Chi Hyun Ryoo¹

¹Center for Supramolecular Optoelectronic Materials (CSOM), Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea.

Nature communications

|September 11, 2023

概括

在有机发光二极管中,新的蓝色发光主体材料具有5,9-dioxa-13b-boranaphtho [3,2,1-de] 和四烯基团,可以实现高效率和低滚动.

科学领域:

有机电子学有机电子学
材料科学是一种材料科学.
光物理学的光学物理学

背景情况:

热激活延迟光 (TADF) 材料对于高效的有机发光二极管 (OLED) 来说至关重要.
在OLED技术中,开发稳定高效的蓝色发射器仍然是一个重大挑战.
含的异环化合物为光电子应用提供独特的电子特性.

研究的目的:

为蓝色发射器设计和合成新的多共振TADF宿主材料.
研究这些新宿主材料的光物理性质和设备性能.
了解OLED中高效率和稳定的结构-属性关系.

主要方法:

三种新型宿主材料的合成,其中包括5,9-dioxa-13b-boranaphtho[3,2,1-de] (DOBNA) 和四基基.
使用这些主体材料与常规蓝色发射器 (ν-DABNA) 合的OLED设备的制造.
光发光的量子产量,水平方向,光发光衰变时间和外部量子效率的表征.

主要成果:

合成的主体材料表现出高光发光量子产量 (>0.82) 和高水平方向 (>88%).
使用 (4-(2,12-di-tert-butyl-5,9-dioxa-13b-boranaphtho[3,2,1-de]-7-yl) phenyl) triphenylsilane (TDBA-Si) 制造的设备实现了高的外部量子效率 (高达36.2%).
该TDBA-Si宿主材料表现出极好的性能,效率>30%和最小的滚动 (在1000cdm-2下4.9%).

结论:

开发的多共振TADF主体材料,特别是TDBA-Si,对于高效和稳定的蓝色OLED非常有效.
从宿主转移到剂的快速能量转移,T1兴奋状态贡献和聚合抑制有助于设备的卓越性能.
这些发现为下一代显示和照明技术中先进的蓝色发射系统铺平了道路.

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