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
徐子杰 1王文军 1李淑红 1刘云龙1
作者信息
- 1. 聊城大学 物理科学与信息工程学院,山东 聊城 252059;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
- 折叠
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4 059 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).
Abstract
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 4 059 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 smaller ΔCIE(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Key words
white organic light-emitting diodes/thermally activated delayed fluorescence materials/solution treat-ment/energy transfer引用本文复制引用
基金项目
国家自然科学基金(61775089)
山东省自然科学基金(ZR2020KB18)
山东省自然科学基金(ZR2022MF240)
聊城大学项目(318011904)
聊城大学项目(318051650)
出版年
2024
国家科技期刊平台
NSTL
万方数据