Highly Efficient Hybrid White Tandem Organic Light-Emitting Diodes with MoO3 Layer

作     者：Lian Duan Taiju Tsuboi Yong Qiu 

作者机构：Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 China Kyoto Sangyo University Kamigamo Kita-ku Kyoto 603-8555 Japan Institute of Advanced Materials Nanjing Tech University Nanjing Jiangsu 210009 China 

出 版 物：《Chinese Journal of Chemistry》 (中国化学（英文版）)

年 卷 期：2015年第33卷第8期

页      面：859-864页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：supported by the National Key Basic Research and Development Programme of China support by the Grant-in-Aid for the Scientific Research 

主　　题：organic light emitting diode white emission tandem device 

摘      要：Electroluminescence （EL） characteristics have been studied for a hybrid tandem white organic light emitting diode （OLED） with a blue emitting fluorescent EL1 unit based on BCzVBi and a yellow emitting phosphorescent EL2 unit based on （fbi）2Ir（acac）, where a MoO3 layer is inserted between EL1 and EL2 units as charge generation layer （CGL）. Maximum current and power efficiencies of 68.1 cd/A and 29.2 lm/W were obtained, respectively, while the current and power efficiencies at luminance of 1000 cd/m2 were 68.0 cd/A and 24.6 lm/W. The yellow emission appears from about 4.5 V firstly, while the blue emission starts to appear from about 5.4 V. It was found that charge generation from CGL of MoO3/NPB bilayer occurred at high voltages of above 5.4 V but not at low voltages below 5.2 V.