绿光到深红光的有效调控:二苯并吡啶并喹喔啉类热激活延迟荧光材料

doi:10.11896/cldb.23110162

材料导报

2025, Vol. 39

Issue (1): 23110162-7 https://doi.org/10.11896/cldb.23110162

高分子与聚合物基复合材料

绿光到深红光的有效调控:二苯并吡啶并喹喔啉类热激活延迟荧光材料

章博¹, 黄飞翔¹, 谢凤鸣², 杨耀祖¹, 胡英元¹, 赵鑫^1,*

1 苏州科技大学化学与生命科学学院, 江苏苏州 215009
2 苏州大学功能纳米与软物质研究院, 江苏省碳基功能材料与器件重点实验室, 江苏苏州 215123

Efficient Regulation of Emission Color from Green to Deep-red: Dibenzo [f, h] pyrido[3, 4-b] Quinoxaline Acceptor Based TADF Emitters

ZHANG Bo¹, HUANG Feixiang¹, XIE Fengming², YANG Yaozu¹, HU Yingyuan¹, ZHAO Xin^1,*

1 College of Chemistry and Life Sciences, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu, China
2 Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, Jiangsu, China

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摘要高效热激活延迟荧光(Thermally activated delayed fluorescence,TADF)材料在有机发光二极管(Organic light-emitting diodes,OLED)中有着重要的应用。然而,由于能隙定律的限制,开发波长超过600 nm的高效红色TADF材料充满了挑战。本工作在设计合成刚性大共轭平面受体二苯并[f,h]吡啶[3,4-b]喹喔啉(DBPQ)的基础上,将不同给电子能力的供体(tCz、DMAC和PXZ)与受体DBPQ大扭角连接,合成了DBPQtCz、DBPQDMAC和DBPQPXZ三种新颖的TADF材料。随着相应供体给电子能力的增强,DBPQtCz、DBPQDMAC和DBPQPXZ的发射波长可有效调控,实现由绿光、红光到深红光的转变。基于DBPQDMAC器件的最大外量子效率(EQE_max)最高可达16.0%,电致发光(Electroluminescent,EL)波长为612 nm;基于DBPQPXZ器件的EQE_max为3.2%,电致发光波长达到658 nm。同时,基于DBPQtCz、DBPQDMAC和DBPQPXZ的OLED均具有较低的开启电压,分别为2.4、2.5和2.8 V。

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关键词: 热激活延迟荧光二苯并[f,h]吡啶[3,4-b]喹喔啉开启电压红光发射

Abstract: Efficient thermally activated delayed fluorescence (TADF) emitters have an important application for organic light-emitting diodes (OLEDs). However, due to the limitations of the energy gap law, the development of efficient red TADF emitters with wavelengthsover 600 nm is challenging. Herein, a novel rigid larger conjugated planar acceptor dibenzo[f, h]pyrido[3, 4-b] quinoxaline (DBPQ) had been designed, and three TADF materials, namely DBPQtCz, DBPQDMAC and DBPQPXZ, were synthesized by connecting with different donors (tCz, DMAC and PXZ) to DBPQ. With the enhancement of electron-donating ability of the corresponding donors, the emission wavelengths of DBPQtCz, DBPQDMAC and DBPQPXZ were significantly red-shifted and turned from green, red to deep-red. The OLED based on DBPQDMAC obtained maximum external quantum efficiency (EQE_max) up to 16.0%, and the peak electroluminescent (EL) of 612 nm, while the EQE_max of DBPQPXZ is 3.2%, and the peak EL is 658 nm. Meanwhile, the OLEDs based on DBPQtCz, DBPQDMAC and DBPQPXZ achieved extremely low turn-on voltages of 2.4, 2.5 and 2.8 V, respectively.

Key words: thermally activated delayed fluorescence dibenzo[f,h] pyrido [3,4-b] quinoxaline turn-on voltage red emission

出版日期: 2025-01-10 发布日期: 2025-01-10

ZTFLH:

O621.22

基金资助: 国家自然科学基金(21905048)

通讯作者: *赵鑫,苏州科技大学教授,硕士研究生导师。主要从事有机光电功能材料的设计、合成及应用研究。zhaoxinsz@usts.edu.cn

作者简介: 章博,苏州科技大学硕士研究生,在赵鑫教授的指导下进行研究。主要从事有机光电材料的合成与性能研究。

引用本文:

章博, 黄飞翔, 谢凤鸣, 杨耀祖, 胡英元, 赵鑫. 绿光到深红光的有效调控:二苯并吡啶并喹喔啉类热激活延迟荧光材料[J]. 材料导报, 2025, 39(1): 23110162-7.
ZHANG Bo, HUANG Feixiang, XIE Fengming, YANG Yaozu, HU Yingyuan, ZHAO Xin. Efficient Regulation of Emission Color from Green to Deep-red: Dibenzo [f, h] pyrido[3, 4-b] Quinoxaline Acceptor Based TADF Emitters. Materials Reports, 2025, 39(1): 23110162-7.

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https://www.mater-rep.com/CN/10.11896/cldb.23110162 或 https://www.mater-rep.com/CN/Y2025/V39/I1/23110162

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