基于双发光层结构的高效率绿色有机发光二极管  

High Efficiency Green Organic Light-Emitting Diode Based on Double Light-Emitting Layers Structure

作　　者：周帝呈 邵晶[1] Zhou Dicheng;Shao Jing(College of Chemistry and Entirowmental Eagineering,Changchun University of Science and Technology,Clamgchur,Jilin 130022,China)

机构地区：[1]长春理工大学化学与环境工程学院,吉林长春130022

出　　处：《激光与光电子学进展》2020年第15期205-210,共6页Laser & Optoelectronics Progress

基　　金：吉林省科学技术厅项目(20190302001GX)。

摘　　要：通过选择绿色磷光材料(2′,6′-双(三氟甲基)-2,3′-联吡啶)四苯基亚氨基二次膦酸酯作为发光材料制备一系列的有机发光二极管。同时,4,4′,4"-三(咔唑-9-基)三苯胺(TcTa)和9,9′-(2,6-吡啶二基二-3,1-亚苯)双-9H-咔唑(26DczPPy)分别被选为发光层(EMLs)l和2的主体材料,因为它们具有相对匹配的能级和较高的载流子迁移率。通过对单发光层器件与双发光层器件的性能进行分析发现,双发光层器件结构的设计有助于拓宽空穴和电子的复合区间,从而提高电致发光(EL)效率。最后,获得了启亮电压为3.1V,最大亮度为12600cd/m^2,电流效率为37.15 cd/A.最大外量子效率为10.34%,最大功率效率为28.23lm/W的器件。A series of organic light-emitting diodes(OLEDs)were designed and fabricated to further enhance electroluminescence(EL)performances of the green phosphorescent emitter bis(2′,6′-bis(trifluoromethyl)-2,3′-bipyridine)tetraphenylimidodiphosphinate,4,4′,4″-Tri(9-carbazoyl)triphenylamine(TcTa)and 9,9′-(2,6-pyridinediyldi-3,1-phenylene)bis-9H-Carbazole(26DezPPy)were selected as host materials of light-emitting layers(EMLs)l and 2,respectively,because of their well-matched energy levels and high carrier mobility.In addition,the design of double-EMLs device structure helps to broaden the recombination of holes and elctrons by the analysis of devices performance.Finally,the green OL.EDs with turn-on voltage of 3.1 V,maximum brightness of 12600 cd/m^2,current efficiency of 37.15 cd/A,maximum external quantum efficiency of 10.34%,and maximum power efficiency of 28.23 lm/w was obtained.

关 键 词：光学器件 磷光材料 发光层 主体材料 复合区间 电致发光效率 

分 类 号：TN38[电子电信—物理电子学]