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溶液和真空处理的TSCT-TADF发射器的分子内结合硬化灵活桥梁

Zhang-Li Cheng¹, Ming Zhang², Yi Yuan³

¹School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang 315211, P. R. China.

Organic letters

|May 27, 2024

概括

使用分子内键 (IHBs) 的新设计策略创建了一个刚性发射器,以有效地通过空间传输电荷. 这种方法导致有机发光二极管的高光发光和外部量子效率.

科学领域:

有机化学有机化学
材料科学材料科学材料科学
光物理学的光学物理学

背景情况:

有效的有机发光二极管 (OLED) 需要优化电荷转移的分子设计.
热激活延迟光 (TADF) 发射器对于高OLED性能至关重要.
实现强大的捐赠者-接受者面对面堆叠是通过空间电荷转移 (TCT) TADF的关键.

研究的目的:

为TCT-TADF发射器提出一个新的设计策略.
为了增强通过分子刚性的捐赠者-接受者堆叠.
为了研究设计发射器的光物理性质和设备性能.

主要方法:

分子设计包括分子内键 (IHBs) 进行刚性.
合成和特征的ACE-CN发射器.
使用溶液和真空处理制造和测试OLED设备.

主要成果:

该ACE-CN发射器具有一个平面化基甲基以太桥,由C-H···O IHBs稳定.
实现了93%的高光发光量子效率 (PLQY).
已证明高外部量子效率 (EQE) 为11.8% (溶液处理) 和24.7% (真空处理).

结论:

拟议的IHB战略有效地将分子碎片结合起来,增强刚性并促进面对面堆叠.
ACE-CN表现出优异的光物理性能和高设备效率,验证了设计方法.
这一战略为开发用于OLED应用的先进TCT-TADF发射器提供了一个有前途的途径.

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