Recent Advances in Concentration Quenching-resistant Multi-resonance Thermally Activated Delayed Fluorescence Emitters.

IF 2.3 3区化学 Q3 CHEMISTRY, PHYSICAL

Chemphyschem Pub Date : 2025-05-05 DOI:10.1002/cphc.202500201

Hua-Xiu Ni, Li Yuan, You-Xuan Zheng

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Abstract

The research on multi-resonance thermally activated delayed fluorescence (MR-TADF) emitters has garnered increasing attention due to the exceptional photophysical properties of their corresponding organic light-emitting diodes (OLEDs), such as high efficiency and narrow emission features. However, they still face intractable issues like concentration-induced emission quenching, exciton annihilation, and spectral broadening. This review focuses on a sophisticated molecular design strategy named "sterically wrapping of MR fluorophores" to tackle the aforementioned problems. Bulky substituents isolate the MR emission core, thereby significantly reducing intermolecular interactions. Therefore, with these MR-TADF emitters, the OLEDs are capable of maintaining narrow emission bands while achieving high external quantum efficiencies across a wide concentration range from 1 wt% to 20 wt% and even at higher concentrations. This article reviews the latest advancements in MR-TADF emitters with suppressed concentration quenching and spectral broadening, emphasizing their chemical structures, optoelectronic properties, and device performances. Finally, the potential challenges and future perspectives of MR-TADF materials are analyzed to better comprehend the potential of efficient narrowband OLEDs.

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耐浓度猝灭多共振热激活延迟荧光发射体的研究进展。

多共振热激活延迟荧光（MR-TADF）发射体由于其所对应的有机发光二极管（oled）具有高效、窄发射等优异的光物理特性而受到越来越多的关注。然而，它们仍然面临着一些棘手的问题，如浓度诱导的发射猝灭、激子湮灭和光谱展宽。本文综述了一种名为“MR荧光团的立体包裹”的复杂分子设计策略，以解决上述问题。大体积取代基隔离MR发射核，从而显著减少分子间相互作用。因此，使用这些MR-TADF发射器，oled能够在保持窄发射带的同时，在从1 wt%到20 wt%的宽浓度范围内，甚至在更高的浓度下，实现高的外部量子效率。本文综述了具有抑制浓度猝灭和光谱展宽的MR-TADF发射体的最新进展，重点介绍了它们的化学结构、光电性能和器件性能。最后，分析了MR-TADF材料的潜在挑战和未来前景，以更好地理解高效窄带oled的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemphyschem 化学-物理：原子、分子和化学物理

CiteScore

4.60

自引率

3.40%

发文量

425

审稿时长

1.1 months

期刊介绍： ChemPhysChem is one of the leading chemistry/physics interdisciplinary journals (ISI Impact Factor 2018: 3.077) for physical chemistry and chemical physics. It is published on behalf of Chemistry Europe, an association of 16 European chemical societies. ChemPhysChem is an international source for important primary and critical secondary information across the whole field of physical chemistry and chemical physics. It integrates this wide and flourishing field ranging from Solid State and Soft-Matter Research, Electro- and Photochemistry, Femtochemistry and Nanotechnology, Complex Systems, Single-Molecule Research, Clusters and Colloids, Catalysis and Surface Science, Biophysics and Physical Biochemistry, Atmospheric and Environmental Chemistry, and many more topics. ChemPhysChem is peer-reviewed.