Space-Isolated Chromophore for Organic Blue Phosphorescence with High Efficiency and a Deep-Blue Lasing Characteristic,The Journal of Physical Chemistry Letters

当前位置： X-MOL 学术 › J. Phys. Chem. Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Space-Isolated Chromophore for Organic Blue Phosphorescence with High Efficiency and a Deep-Blue Lasing Characteristic
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2023-06-07 , DOI: 10.1021/acs.jpclett.3c01277
Yongyu Cha ₁ , Runqing Gao ₁ , Zhen Zhang ₁ , Hongbing Fu _{1,

2} , Zhenyi Yu ₁

Affiliation

High-efficiency blue phosphorescence and deep-blue laser emissions play a crucial role in organic optoelectronic applications. However, designing metal-free organic blue luminescence with high energy levels of excited states and suppression of nonradiative transitions remains a formidable challenge. Herein, we demonstrate a synthetic strategy for achieving a deep-blue laser and efficient phosphorescence based on confining chromophores in the tetrahedral structure of sp3 hybridization. The data analysis reveals that the construction of the quaternary carbon center contributes to spatially separated donors and acceptors and considerable steric constraints, prompting an effective intersystem crossing (ISC) process and suppressing nonradiative transitions. The negligible interaction between chromophores simultaneously produces a deep-blue fluorescent laser and blue phosphorescence with an efficiency up to 82.3%. This work opens the door to multifunctional blue-emitting materials with high efficiency, providing a high-potential candidate for electrically pumped organic lasers and energy efficient light-emitting diodes.

中文翻译：

具有高效率和深蓝激光特性的有机蓝色磷光的空间隔离生色团

高效蓝色磷光和深蓝色激光发射在有机光电应用中起着至关重要的作用。然而，设计具有高能级激发态和抑制非辐射跃迁的无金属有机蓝色发光仍然是一项艰巨的挑战。在此，我们展示了一种基于 sp3 杂化四面体结构中的限制发色团实现深蓝色激光和高效磷光的合成策略。数据分析表明，季碳中心的构建有助于空间上分离的供体和受体以及相当大的空间限制，从而促进有效的系统间交叉（ISC）过程并抑制非辐射跃迁。发色团之间可忽略不计的相互作用同时产生深蓝色荧光激光和蓝色磷光，效率高达 82.3%。这项工作为高效的多功能蓝光材料打开了大门，为电泵浦有机激光器和节能发光二极管提供了高潜力的候选材料。

更新日期：2023-06-07

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南