以硅杂吖啶为电子给体的蓝色聚集诱导延迟荧光材料

doi:10.6023/cjoc202403047

研究论文

以硅杂吖啶为电子给体的蓝色聚集诱导延迟荧光材料

何俊初^†a, 伍俊琪^†a, 王江辉^a, 徐静文^a, 唐本忠^b, 赵祖金^a,*

^a华南理工大学发光材料与器件国家重点实验室广州 510640
^b香港中文大学（深圳）理工学院深圳 518172

收稿日期:2024-03-28 修回日期:2024-06-20
作者简介:†共同第一作者
基金资助:
国家自然科学基金(Nos. U23A20594、22375066)、广东省基础与应用基础研究基金(Nos. 2023B1515040003、2022A1515010315、2021A1515110826)和广州市科技计划项目(No. 202201010439).

Blue Aggregation-Induced Delayed Fluorescence Materials with Dihydrophenazasiline as Donor

He, Junchu^†a, Wu, Junqi^†a, Wang, Jianghui^a, Xu, Jingwen^a, Tang, Ben Zhong^b, Zhao, Zujin^*a

^aState Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640
^bSchool of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, 518172

Received:2024-03-28 Revised:2024-06-20
Contact: *E-mail: mszjzhao@scut.edu.cn
About author:†These authors contributed equally to this work
Supported by:
National Natural Science Foundation of China (Nos. U23A20594、22375066), and the Guangdong Basic and Applied Basic Research; Foundation (Nos. 2023B1515040003, 2022A1515010315).

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摘要/Abstract

本文以硅杂吖啶（DPDBA）和咔唑衍生物作为电子给体、苯甲酮作为电子受体构筑给体-受体-给体（D-A-D'）型分子,开发了三个蓝光材料（CP-BP-DPDBA、DCB-BP-DPDBA和CBP-BP-DPDBA）。对材料的热稳定性、电化学性质、单晶结构、光物理性质和电致发光性能等进行了系统研究。三个材料具有较小的单线态-三线态能级差以及微秒级别的延迟荧光寿命,并表现出显著的聚集诱导延迟荧光（AIDF）特性。以这些材料作为发光层制备的OLED器件的最大外量子效率（EQE）达到14.8%,发光峰在474~476 nm。由于这些AIDF分子具有良好的双极载流子传输性能,将这些材料作为主体材料制备了不同光色的磷光OLED器件,器件表现出较为优秀的性能,其中黄光和绿光器件的EQE分别为25.5%和21.2%,在1000 cd m^-2亮度下效率滚降非常小。因此,所制备的这些AIDF分子可分别作为发光材料和主体材料用于高性能OLED器件的制备,具有较好的应用前景。

关键词: 有机发光二极管, 聚集诱导延迟荧光, 主体材料, 聚集诱导发光

Three blue-emitting materials CP-BP-DPDBA, DCB-BP-DPDBA and CBP-BP-DPDBA were designed and synthesized using 10,10-diphenyl-dihydrophenazasiline (DPDBA) and carbazole derivatives as donors, and benzophenone as acceptor to construct donor-acceptor-donor (D-A-D') type molecules, and their thermal stability, electrochemical properties, single crystal structure, photophysical properties and electroluminescence properties were systematically studied. And they have small singlet-triplet energy splitting and microsecond-scale delayed lifetimes, showing obvious aggregation-induced delayed fluorescence (AIDF) characteristics. As light-emitting layers of organic light-emitting diodes (OLEDs), the electroluminescence peaks of these compounds are in range of 474 to 476 nm, and the maximum external quantum efficiency (EQE) can reach 14.8%. Additionally, these compounds exhibit good bipolar carrier transport performance, and can be used as host materials for phosphorescent devices. The maximum EQEs of green and yellow phosphorescent OLEDs are 25.5% and 21.2%, respectively, and the efficiency roll-off at 1000 cd m^‒2 is very small. These results indicate that these AIDF compounds not only can be used as luminescent materials but also as host materials for the preparation of high-performance

Key words: OLED, AIDF, host material, aggregation-induced emission

引用此文

何俊初, 伍俊琪, 王江辉, 徐静文, 唐本忠, 赵祖金. 以硅杂吖啶为电子给体的蓝色聚集诱导延迟荧光材料[J]. 有机化学, doi: 10.6023/cjoc202403047.

He, Junchu, Wu, Junqi, Wang, Jianghui, Xu, Jingwen, Tang, Ben Zhong, Zhao, Zujin. Blue Aggregation-Induced Delayed Fluorescence Materials with Dihydrophenazasiline as Donor[J]. Chinese Journal of Organic Chemistry, doi: 10.6023/cjoc202403047.

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