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 

机构地区：[1]Materials Research Institute and School of Physics and Astronomy,Queen Mary University of London,Mile End Road,E14NS London,UK [2]Institute of Functional Material Chemistry,Faculty of Chemistry,Northeast Normal University,Changchun 130024,China [3]Materials Research Institute and School of Biological and Chemical Sciences,Queen Mary University of London,Mile End Road,E14NS London,UK [4]Chromosol Ltd,The Walbrook Building,25 Walbrook,London EC4N 8A,UK

出　　处：《Light(Science & Applications)》2020年第1期1706-1715,共10页光（科学与应用)（英文版）

基　　金：supported by the China Scholarship Council,Queen Mary University of London and the Open Project of the State Key Laboratory of Luminescence and Applications,CIOMP;financial support from EPSRC(EP/L020114/1 and EP/P007767/1).

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(Er^(3+))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 Er^(3+) complex with a perfluorinatedligand shell.The large volume can protect the Er^(3+) 1.5-μm luminescence from vibrational quenching.The average lifetime of the sensitized Er^(3+) 1.5-μm luminescence reaches ~0.86 ms,with a lifetime component of 2.65 ms,which is by far the longest Er^(3+) lifetime in a hydrogen-abundant organic environment and can even compete with that obtained in the fully fluorinated organic Er^(3+) system.The optimal sensitization enhances the Er^(3+) luminescence by a factor of 1600 even with a high concentration of the phosphorescent molecule,and bright 1.5-μm OLEDs are obtained.

关 键 词：ELECTROLUMINESCENCE LIFETIME luminescence 

分 类 号：O43[机械工程—光学工程]