用于具有单组分发光层的有机发光二极管的聚集诱导发光发光剂,Aggregate

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用于具有单组分发光层的有机发光二极管的聚集诱导发光发光剂
Aggregate ( IF 13.9 ) Pub Date : 2022-04-23 , DOI: 10.1002/agt2.199
Jinhyo Hwang ₁ , Peethani Nagaraju ₁ , Min Ju Cho ₁ , Dong Hoon Choi ₁

Affiliation

有机发光二极管 (OLED) 作为下一代显示器和固态照明设备中应用的有希望的候选者而受到越来越多的关注。通常用于制造 OLED 发光层 (EML) 的掺杂技术将发光材料分散在主体基质中，以减轻聚集诱导猝灭 (ACQ)。或者，由于其高效率和易于制造，非掺杂 OLED 已被开发为掺杂 OLED 的替代品。在制造非掺杂 OLED 时，必须抑制 EML 中的 ACQ 效应，并有效利用产生的激子进行辐射衰减。自从 Tang 等人发现聚集诱导发光 (AIE) 以来，在提高基于荧光 AIE 发光体 (AIEgens) 的非掺杂 OLED 的稳定性和效率方面，已经做了大量工作。使用各种分子框架合成的荧光 AIEgens，如噻咯、四/三苯基乙烯、四苯基吡嗪和四苯基苯，在固态下表现出高光致发光量子产率。因此，许多研究报道，基于荧光 AIEgen 的 OLED 具有出色的外部量子效率，并在各种波长下表现出发射，包括深蓝/蓝/绿发射。随着荧光 AIEgens 的发展，延迟荧光 AIEgens 通过反向系统间交叉和 AIE 特性有效地利用三重态，已被用作理想的发射体，并用于非掺杂 OLED。这篇综述系统地讨论和总结了最近关于非掺杂 OLED 的 AIEgens 发展的报道，将它们分为荧光和延迟荧光 AIEgens。这篇综述的目的是深入了解用于高性能非掺杂 OLED 的新型 AIEgens 的设计。

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Aggregation-induced emission luminogens for organic light-emitting diodes with a single-component emitting layer

Organic light-emitting diodes (OLEDs) have garnered increasing attention as a promising candidate for application in next-generation displays and solid-state lighting devices. The doping technique commonly used to fabricate light-emitting layers (EMLs) of OLEDs disperses the emitting material in a host matrix to mitigate aggregation-induced quenching (ACQ). Alternatively, owing to their high efficiency and ease of manufacture, nondoped OLEDs have been developed as a substitute for doped OLEDs. When fabricating nondoped OLEDs, it is essential to suppress the ACQ effect in the EML and efficiently utilize the generated excitons for radiative decay. Since the discovery of aggregation-induced emission (AIE) by Tang et al., significant work has been done to improve the stability and efficiency of nondoped OLEDs based on fluorescent AIE luminogens (AIEgens). Fluorescent AIEgens, synthesized using various molecular frameworks, such as silole, tetra/triphenylethylene, tetraphenylpyrazine, and tetraphenylbenzene, exhibit high photoluminescence quantum yields in the solid state. Therefore, many studies have reported that fluorescent AIEgen-based OLEDs have excellent external quantum efficiency and exhibit emission at various wavelengths, including deep-blue/blue/green emission. With the development of fluorescent AIEgens, delayed fluorescent AIEgens with efficient triplet utilization through reverse intersystem crossing and AIE properties have been adopted as ideal emitters and used in nondoped OLEDs. This review systematically discusses and summarizes recent reports on the development of AIEgens for nondoped OLEDs by grouping them into fluorescent and delayed fluorescent AIEgens. The purpose of this review is to provide deep insights into the design of novel AIEgens for high-performance nondoped OLEDs.

更新日期：2022-04-23

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