基于混合主体结构的溶液法制备的高效蓝色磷光OLED  

High-efficiency Blue Phosphorescent OLEDs Based on Mixed-host Structure by Solution-processed Method

作　　者：王哲[1,2] 武瑞霞[1] 冯洋 刘华 周亮[1] WANG Zhe;WU Rui-xia;FENG Yang;LIU Hua;ZHOU Liang(State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China;Center for Advanced Optoelectronic Functional Materials Research,and Key Laboratory of UV Light-emitting Materials and Technology of Ministry of Education,Northeast Normal University,Changchun 130024,China)

机构地区：[1]中国科学院长春应用化学研究所稀土资源利用国家重点实验室,吉林长春130022 [2]东北师范大学先进光电子功能材料研究中心,紫外光发射材料与技术教育部重点实验室,吉林长春130024

出　　处：《发光学报》2022年第5期763-772,共10页Chinese Journal of Luminescence

基　　金：国家自然科学基金(62174160);中国科学院科研设备开发项目(YJKYYQ20200005)资助。

摘　　要：为了提高蓝色有机发光二极管的效率,本文借助溶液法采用TcTa和CzSi混合主体,制备了蓝色磷光有机发光二极管(PHOLEDs)。此外,针对三种电子传输材料Tm3PyP26PyB、TmPyPB和TPBi进行了优选,以进一步优化器件的效率。本文通过优化混合主体材料的掺杂比例和电子传输材料的选择,不断提高器件的效率。最终,当TcTa∶CzSi的掺杂比为6∶1、电子传输层TPBi为70 nm时器件性能最优,其最大亮度(B_(max))、电流效率(CE_(max))、功率效率(PE_(max))和外量子效率(EQE_(max))分别为6662 cd·m^(-2)、39.40 cd·A^(-1)、23.33 lm·W^(-1)和19.7%。此外,即使在1000 cd·m^(-2)的实际亮度下,电流效率和外量子效率仍高达33.43 cd·A^(-1)和16.7%。Blue phosphorescent organic light-emitting diodes(PHOLEDs)which utilized TcTa and CzSi as the mixed-host were fabricated to improve the efficiency by solution-processed method.Additionally,three electron transport materials Tm3PyP26PyB,TmPyPB and TPBi were employed to further enhance the efficiency of devices.The efficiency was improved by optimizing the ratio of host materials and the selection of electron transport material.Finally,the optimal device with the doping ratio TcTa∶CzSi of 6∶1 and 70 nm TPBi layer exhibited the maximum brightness(B_(max)),current efficiency(CE_(max)),power efficiency(PE_(max))and external quantum efficiency(EQE_(max))of 6662 cd·m^(-2),39.40 cd·A^(-1),23.33 lm·W^(-1) and 19.7%,respectively.Moreover,outstanding current efficiency and external quantum efficiency as high as 33.43 cd·A^(-1) and 16.7%,respectively,were obtained,even at the practical brightness of 1000 cd·m^(-2).

关 键 词：有机发光二极管 高效 溶液法 混合主体结构 蓝光 

分 类 号：TN383.1[电子电信—物理电子学]