基于羰基-氮衍生物的高效多共振热激活延迟荧光发射器

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments Pub Date : 2025-03-17 DOI:10.1016/j.dyepig.2025.112770

Shangru Li , Xiao-Long Liu , Jia-Xiong Chen , Congcong Kai , Zhichao Mao , Longjiang Xing , Yong-Zhi Chen , Yao-Zu Su , Weiqiang Li , Wen-Cheng Chen , Yanping Huo

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引用次数: 0

摘要

在高掺杂有机发光二极管（oled）中，开发多共振热激活延迟荧光（MR-TADF）材料以实现小的半最大全宽（FWHM）和高的外量子效率（EQE）是非常需要的。在本研究中，我们设计了一种新的MR-TADF发射体，3,11-二叔丁基-7-（10-苯基- 10h -螺[吖啶-9,9 ' -芴]-3 ' -基）喹啉[3,2,1 -de]吖啶-5,9-二酮（tBuCON-ST），通过将一个螺芴三苯胺（ST）基团加入到MR-TADF框架中。ST基团引入位阻，有效抑制激子猝灭。因此，在高掺杂比下，tBuCON-ST显示出高激子利用率，同时保持34 nm的窄FWHM。此外，在掺杂浓度为10 wt%时，基于bucon - st的oled获得了超过19.1%的高EQEs，显著优于相同掺杂水平下的基于bucon的oled。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Highly efficient multi-resonant thermally activated delayed fluorescence emitter based on carbonyl-nitrogen derivative

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Highly efficient multi-resonant thermally activated delayed fluorescence emitter based on carbonyl-nitrogen derivative

The development of multi-resonant thermally activated delayed fluorescence (MR-TADF) materials to achieve a small full width at half maximum (FWHM) and high external quantum efficiency (EQE) in highly doped organic light-emitting diodes (OLEDs) is highly desirable. In this study, we designed a novel MR-TADF emitter, 3,11-di-tert-butyl-7-(10-phenyl-10H-spiro[acridine-9,9′-fluoren]-3′-yl)quinolino[3, 2, 1 -de]acridine-5,9-dione (tBuCON-ST), by incorporating a spirofluorene triphenylamine (ST) group into the MR-TADF framework of tBuCON. The ST group introduces steric hindrance, effectively suppressing exciton quenching. Consequently, tBuCON-ST demonstrated high exciton utilization at elevated doping ratios while maintaining a narrow FWHM of 34 nm. Moreover, tBuCON-ST-based OLEDs achieved high EQEs exceeding 19.1 % at doping concentrations of 10 wt%, significantly outperforming tBuCON-based OLEDs at the same doping levels.

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来源期刊

Dyes and Pigments 工程技术-材料科学：纺织

CiteScore

8.20

自引率

13.30%

发文量

933

审稿时长

33 days

期刊介绍： Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied. Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media. The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.