用于高效超荧光有机发光二极管的纯有机室温磷光敏化剂。
Purely organic room-temperature phosphorescence sensitizers for highly efficient hyperfluorescence OLEDs.
作者信息
Zeng Jiajie, Song Shaoxin, Fu Yan, Peng Xiaoluo, Tang Ben Zhong, Zhao Zujin
机构信息
State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou 510640, China.
School of Science and Engineering, Shenzhen Institute of Aggregate Science and Technology, Chinese University of Hong Kong, Shenzhen 518172, Guangdong, China.
出版信息
Sci Adv. 2025 Mar 21;11(12):eadt7899. doi: 10.1126/sciadv.adt7899.
Multiresonance thermally activated delayed fluorescence (MR-TADF) emitters are promising candidates for organic light-emitting diodes (OLEDs) with high color quality. However, in most cases, noble metal-containing phosphors are required as sensitizers for MR-TADF emitters to improve their electroluminescence (EL) performances, which may lead to high cost and environmental pollution. Herein, an efficient purely organic room-temperature phosphorescence (RTP) material, 3,2-PIC-TXT, with fast phosphorescence radiation is developed. It not only exhibits impressive EL performances as an emitter with an outstanding external quantum efficiency (EQE) of 33.2%, higher than that of Ir(ppy) (25.2%), but also functions remarkably as a sensitizer for green MR-TADF emitters (BN2, tCzphB-Ph, and tCzphB-Fl). The hyperfluorescence OLEDs using 3,2-PIC-TXT as a sensitizer provide ultrahigh EQEs of 40.9 to 43.8%, superior to those based on an Ir(ppy) sensitizer (37.0 to 38.0%), along with superb color purity and excellent operational stability. These OLEDs are the best devices based on RTP materials reported so far.
多共振热激活延迟荧光（MR-TADF）发光体是具有高色质的有机发光二极管（OLED）的有前途的候选材料。然而，在大多数情况下，需要含贵金属的磷光体作为MR-TADF发光体的敏化剂来改善其电致发光（EL）性能，这可能导致高成本和环境污染。在此，开发了一种高效的纯有机室温磷光（RTP）材料3,2-PIC-TXT，其具有快速的磷光辐射。它不仅作为发光体表现出令人印象深刻的EL性能，具有33.2%的出色外量子效率（EQE），高于Ir(ppy)（25.2%），而且作为绿色MR-TADF发光体（BN2、tCzphB-Ph和tCzphB-Fl）的敏化剂也具有显著作用。使用3,2-PIC-TXT作为敏化剂的超荧光OLED提供了40.9%至43.8%的超高EQE，优于基于Ir(ppy)敏化剂的OLED（37.0%至38.0%），同时具有出色的色纯度和优异的操作稳定性。这些OLED是迄今为止报道的基于RTP材料的最佳器件。
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