基于蓝光TADF材料的敏化白光OLED特性  

Characterization of Sensitized White OLEDs Based on Blue TADF Materials

作　　者：徐子杰 王文军[1,2] 李淑红[1,2] 刘云龙[1,2] XU Zijie;WANG Wenjun;LI Shuhong;LIU Yunlong(School of Physical Science and Information Technology,Liaocheng University,Liaocheng 252059,China;Shandong Provincial Key Laboratory of Optical Communication Science and Technology,Liaocheng University,Liaocheng 252059,China)

机构地区：[1]聊城大学物理科学与信息工程学院,山东聊城252059 [2]聊城大学山东省光通信科学与技术重点实验室,山东聊城252059

出　　处：《发光学报》2024年第6期1005-1014,共10页Chinese Journal of Luminescence

基　　金：国家自然科学基金(61775089);山东省自然科学基金(ZR2020KB18,ZR2022MF240);聊城大学项目(318011904,318051650)。

摘　　要：白光有机发光二极管(WOLEDs)由于面光源、可柔性、轻薄、自发光等优势而广泛应用于显示和照明领域。目前,高效溶液处理的混合白光有机发光二极管很少被报道。本文选择蓝色热致延迟荧光材料DMAC-DPS作为传统橙色磷光材料PO-01-TB的敏化主体,制备了热活化敏化的杂化单发光层有机发光二极管白光器件,分析了器件能量传递机制。通过主客体掺杂浓度调控,实现了外部量子效率最高为8.00%、电流效率为22.32 cd/A、对应CIE坐标(0.405,0.497)及色温为4059 K的暖白光OLED器件,增加空穴阻挡层DPEPO有效地提高了器件的光谱稳定性,实现了更小的ΔCIE(0.017,0.016)。White organic light-emitting diodes(WOLEDs)are widely used in display and lighting applications due to the advantages of surface light source,flexibility,thinness,and self-emission.Highly efficient solution-processed hybrid white light-emitting organic light-emitting diodes(WOLEDs)are seldom reported.In this paper,we chose the blue thermally delayed fluorescent material DMAC-DPS to be the sensitised host of the conventional orange phosphorescent material PO-01-TB,and prepared thermally activated sensitised hybrid single light-emitting layer organic light-emitting diode white-light devices,and analysed the mechanism of the energy transfer of the devices.The highest external quantum efficiency of 8.00%,current efficiency of 22.32 cd/A,corresponding to the CIE coordinates(0.405,0.497)and a warm white OLED device with a color temperature of 4059 K were achieved through the modulation of the doping concentration of the host and the guest.The addition of a hole-blocking layer,DPEPO,effectively improves the spectral stability of the device and achieves a smallerΔCIE(0.017,0.016).This study inspires the development of efficient WOLEDs in the future.

关 键 词：白光有机发光二极管 热致延迟荧光材料 溶液处理 能量转移 

分 类 号：TN312.8[电子电信—物理电子学]