Progress of Purely Organic Room-temperature Electrophosphorescent Materials and Devices

LI Mengke; CHEN Zijian; QIU Weidong; SU ShiJian

doi:10.37188/CJL.20220300

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Progress of Purely Organic Room-temperature Electrophosphorescent Materials and Devices

Invited Paper | 更新时间：2023-02-16

- Progress of Purely Organic Room-temperature Electrophosphorescent Materials and Devices
  增强出版
- Chinese Journal of Luminescence Vol. 44, Issue 1, Pages: 90-100(2023)
- 作者机构：
  
  1.华南理工大学材料科学与工程学院发光材料与器件国家重点实验室，广东广州　510641
- 作者简介：
- 基金信息：
  
  National Key R&D Program of China(2020YFA0714600);National Natural Science Foundation of China(52273179;51625301;91833304;51861145301);Guangdong Basic and Applied Basic Research Foundation(2019B1515120023);Guangdong Provincial Department of Science and Technology(2016B090906003;2016TX03C175)
- DOI：10.37188/CJL.20220300
  CLC：
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LI Mengke, CHEN Zijian, QIU Weidong, et al. Progress of Purely Organic Room-temperature Electrophosphorescent Materials and Devices. [J]. Chinese Journal of Luminescence 44(1):90-100(2023)
DOI：

LI Mengke, CHEN Zijian, QIU Weidong, et al. Progress of Purely Organic Room-temperature Electrophosphorescent Materials and Devices. [J]. Chinese Journal of Luminescence 44(1):90-100(2023) DOI： 10.37188/CJL.20220300.

摘要

纯有机室温磷光（RTP）材料由于能够直接利用电致激发产生的75%的三线态激子，近年来在有机电致发光领域受到研究人员的广泛关注。然而，由于纯有机材料理论上的自旋禁阻特性，使得三线态激子的辐射速率慢、激子寿命长，从而难以与非辐射耗散竞争。因此，通过有效的分子设计策略实现增强的自旋⁃轨道耦合，从而促进快速的系间窜越和磷光辐射过程，进而实现高磷光量子效率并抑制长三线态激子寿命导致的各种非辐射失活，对于开发高效的纯有机电致RTP材料与器件至关重要。本文从RTP的分子结构设计出发对近年来的纯有机电致室温磷光材料和器件进行综述，总结了含有不同重原子的纯有机磷光材料的电致发光性能，指出目前研究中需要解决的关键问题，并对其在电致发光领域的应用前景进行了展望。

Abstract

Purely organic room-temperature phosphorescence （RTP） materials have received extensive attention in the field of organic electroluminescence in recent years for the direct utilization of the 75% triplet excitons generated by electro-excitation. However， due to the theoretical spin-forbidden properties of purely organic materials， triplet excitons generally possess slow radiation rates and long exciton lifetimes， making it prone to non-radiative dissipation. Therefore， achieving enhanced spin-orbit coupling through efficient molecular design strategies is essential to promote fast intersystem crossing and phosphorescence radiation processes， thereby achieving high phosphorescence quantum efficiency and suppressing non-radiative deactivation of long-lived triplet excitons. In this article， based on the structural design principles of RTP materials， we reviewed recent progresses of purely organic RTP electroluminescence materials and devices， and summarized the application of RTP materials containing different non-metallic heavy atoms in electroluminescent devices. Also， we pointed out the key problems that need to be solved in the current research， and prospected the potential application of purely organic RTP materials in the field of electroluminescence.

关键词

纯有机室温磷光三线态激子电致发光有机发光二极管

Keywords

purely organic room-temperature phosphorescence materialtriplet excitonelectroluminescenceorganic light-emitting diode

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