High-efficiency crystalline white organic lightemitting diodes  

作　　者：Yijun Liu Feng Zhu Yue Wang Donghang Yan 

机构地区：[1]State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China. [2]School of Applied Chemistry and Engineering,University of Science and Technology of China,Hefei 230026,China. [3]State Key Laboratory of Supramolecular Structure and Materials,Jilin University,Changchun 130012,China

出　　处：《Light(Science & Applications)》2024年第4期747-759,共13页光（科学与应用)（英文版）

基　　金：the financial support from National Key R&D Program of China(grant no.2017YFA0204704 to D.H.Y.)。

摘　　要：Crystalline white organic light-emitting diodes(C-WOLEDs)are promising candidates for lighting and display applications.It is urgently necessary,however,to develop energy-saving and high-efficiency C-WOLEDs that have stable and powerful emission to meet commercial demands.Here,we report a crystalline host matrix(CHM)with embedded nanoaggregates(NA)structure for developing high-performance C-WOLEDs by employing a thermally activated delayed fluorescence(TADF)material and orange phosphorescent dopants(Phos.-D).The CHM-TADFNA-D WOLED exhibit a remarkable EQE of 12.8%,which is the highest performance WOLEDs based on crystalline materials.The device has a quick formation of excitons and a well-designed energy transfer process,and possesses a fast ramping of luminance and current density.Compared to recently reported high-performance WOLEDs based on amorphous material route,the C-WOLED achieves a low series-resistance Joule-heat loss ratio and an enhanced photon output,demonstrating its significant potential in developing the next-generation WOLEDs.

关 键 词：DIODES DOPANT CRYSTALLINE 

分 类 号：TN312.8[电子电信—物理电子学]