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通过结构度化探索坚固的延迟光材料,以实现具有高效率和小滚动的有机发光二极管

Jinke Chen¹, Zhangshan Liu¹, Letian Chen¹

¹State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, 510640, China.

Small (Weinheim an der Bergstrasse, Germany)

|October 12, 2023

概括

具有刚性结构的新绿色热激活延迟光材料 (TADF) 为有机发光二极管 (OLED) 提供高效率和稳定性. 这些化合物最大限度地降低了效率下降,为提高OLED性能铺平了道路.

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:

热激活延迟光 (TADF) 材料对于高性能有机发光二极管 (OLED) 来说至关重要.
效率的推移仍然是当前基于TADF的OLED的重大挑战.
开发具有增强稳定性和效率的新型TADF发射器至关重要.

研究的目的:

设计和合成具有增强分子刚性的新型绿色TADF化合物.
研究结构刚度对热稳定性,光物理性质和设备性能的影响.
评估这些化合物在OLED中作为发射器和敏感剂的潜力.

主要方法:

合成TADF化合物,其中包括刚性丁受体和基于阿克里丁的螺旋供体.
热稳定性,光发光量效率 (PLQEs) 和TADF属性的表征.
使用合成化合物作为发射器和敏感剂制造和测试OLED设备.

主要成果:

合成的化合物由于增强的分子刚性而表现出高热稳定性.
取得了极好的光发光量子效率 (96%-97%) 和很大的水平二极管比率 (87.4%-92.1%).
奥莱德显示出高的外部量子效率 (高达37.4%),效率滚动最小.
使用这些化合物作为敏感剂的超光OLED显示出出色的效率 (高达34.2%) 和改善的颜色纯度.

结论:

开发的刚性TADF化合物有效地抑制了OLED中的效率滚动.
这些材料显示出作为先进的OLED应用的高性能发射器和传感器的巨大潜力.
分子设计策略为未来的TADF材料开发提供了一个有希望的路线.

关键词:

聚合增强的延迟光增强聚合增强的延迟光增强电光发光是一种电光.横向的方向是指水平的方向.有机发光二极管是有机发光二极管.热激活的延迟光效应

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