Enhanced 1.54-μm photo- and electroluminescence based on a perfluorinated Er(Ⅲ) complex utilizing an iridium(Ⅲ) complex as a sensitizer

• 作者: Hong-Fei Li Xiao-Qi Liu Chen Lyu Jelena Gorbaciova Li-Li Wen Guo-Gang Shan Peter.B.Wyatt Huan-Qing Ye William P.Gillin
• 来源期刊: 光：科学与应用（英文版）
• 年，卷（期）: 2020,（2）
• 所属期刊栏目: Original Articles
• 页码范围: 300-309
• 页数: 10页
• 语种: 英文

摘要

Advanced 1.5-μm emitting materials that can be used to fabricate electrically driven light-emitting devices have the potential for developing cost-effective light sources for integrated silicon photonics. Sensitized erbium (Er3+) in organic materials can give bright 1.5-μm luminescence and provide a route for realizing 1.5-μm organic light emitting diodes (OLEDs). However, the Er3+electroluminescence (EL) intensity needs to be further improved for device applications. Herein, an efficient 1.5-μm OLED made from a sensitized organic Er3+co-doped system is realized, where a"traditional"organic phosphorescent molecule with minimal triplet–triplet annihilation is used as a chromophore sensitizer. The chromophore provides efficient sensitization to a co-doped organic Er3+complex with a perfluorinated-ligand shell. The large volume can protect the Er3+1.5-μm luminescence from vibrational quenching. The average lifetime of the sensitized Er3+1.5-μm luminescence reaches～0.86 ms, with a lifetime component of 2.65 ms, which is by far the longest Er3+lifetime in a hydrogen-abundant organic environment and can even compete with that obtained in the fully fluorinated organic Er3+system. The optimal sensitization enhances the Er3+luminescence by a factor of 1600 even with a high concentration of the phosphorescent molecule, and bright 1.5-μm OLEDs are obtained.