Three‐ and Four‐Coordinate, Boron‐Based, Thermally Activated Delayed Fluorescent Emitters,Advanced Optical Materials

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Three‐ and Four‐Coordinate, Boron‐Based, Thermally Activated Delayed Fluorescent Emitters
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2020-09-18 , DOI: 10.1002/adom.202000922
Shantaram S. Kothavale ₁ , Jun Yeob Lee ₁

Affiliation

Recent developments in purely organic‐material‐based thermally activated delayed fluorescence (TADF) emitters are helping to make them suitable for commercial applications in the near future. In spite of their high external quantum efficiencies, the broad emission spectra and short device lifetimes are the main barriers to using TADF emitters. Among the classes of materials, boron‐embedded polycyclic aromatic compounds have shown potential as TADF emitters that overcome the technical issues. In particular, highly efficient boron‐based TADF emitters with the advantage of a narrowband emission spectrum have been reported recently relying on the concept of a multi‐resonance effect. Hence, boron TADF emitters have the potential to become next‐generation emitters. Based on the future scope of the boron‐based TADF emitters (especially in development of blue TADF emitters), three‐ and four‐coordinate boron TADF emitters are reviewed. Additionally, future prospects of boron‐based TADF emitters are discussed to resolve the issues of low efficiency and short lifetimes of blue emitters.

中文翻译：

三坐标和四坐标，基于硼的热激活延迟荧光发射体

基于纯有机材料的热活化延迟荧光（TADF）发射器的最新发展正在帮助使其在不久的将来适合商业应用。尽管它们具有很高的外部量子效率，但宽的发射光谱和较短的器件寿命是使用TADF发射器的主要障碍。在各种材料中，硼嵌入的多环芳族化合物已显示出克服技术问题的TADF发射体的潜力。尤其是，最近有报道称，依靠多共振效应的概念，具有窄带发射谱的高效硼基TADF发射器。因此，硼TADF发射极有可能成为下一代发射极。根据硼基TADF发射器的未来范围（尤其是在蓝色TADF发射器的开发中），对三坐标和四坐标硼TADF发射器进行了回顾。此外，讨论了硼TADF发射器的未来前景，以解决蓝色发射器效率低和寿命短的问题。

更新日期：2020-11-18

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