高效叠层OLED白光器件进展  

Development of Highly Efficient Tandem White OLEDs

作　　者：常诚 钱福丽 芶国汝 唐锐 王体炉 高思博 张韦晨曦 何阳阳 李理 杨启鸣 张杰 刘颖琪 段瑜 杨文运 王光华 CHANG Cheng;QIAN Fuli;GOU Guoru;TANG Rui;WANG Tilu;GAO Sibo;ZHANG Weichenxi;HE Yangyang;LI Li;YANG Qiming;ZHANG Jie;LIU Yingqi;DUAN Yu;YANG Wenyun;WANG Guanghua(Yunnan Olightek Opto-electronic Technology Co.,Ltd.,Kunming 650223,China)

机构地区：[1]云南北方奥雷德光电科技股份有限公司,云南昆明650223

出　　处：《红外技术》2023年第11期1141-1152,共12页Infrared Technology

基　　金：云南省科技厅科技计划项目(2022024H210001)。

摘　　要：叠层有机发光二极管(Organic Light-Emitting Diode,OLED)白光器件具备低功耗、高亮度、高色域等性能优势。然而,由于效率、寿命及驱动电压等性能仍有较大改进空间,叠层结构的材料及电学结构仍需进一步优化。本文重点介绍叠层OLED白光器件的最新研究进展,总结了三类电荷产生层(Charge Generation Layer,CGL)在工程化应用中存在的问题以及其非破坏性检测方法;综述高效叠层OLED白光器件的“全磷光体系”、“并行通道激子收集”及“混合磷光热活性型延迟荧光(Thermally Activated Delayed Fluorescence,TADF)体系”最新研究成果,对器件寿命问题进行总结,探讨分析“分级掺杂”、“四色混合TADF体系”等从结构方面提出优化方案,并针对不同发光材料体系中的CGL材料及结构综述叠层OLED白光器件实现较低工作电压的技术方法,最后对叠层OLED白光器件的材料和结构提出改进建议。Tandem white OLEDs offer low power consumption,high brightness,and a high color gamut.However,the material and electrical structures of tandem white OLEDs still need to be optimized owing to the outstanding challenges in efficiency,lifetime,and driving voltage.In this study,we focused on the latest research on tandem white OLEDs and summarized the problems in engineering preparation and non-destructive detection method of 3 types of CGLs for high-efficiency tandem white OLEDs.We focused on the latest research on the“all-phosphorescent system,”“harvesting excitons via two parallel channels,”and the“mixed-phosphorescent-TADF system”simultaneously.We summarized the device lifetime problems and discussed structural solutions such as"graded doping"and"four-color mixed-phosphorescent-TADF system."From the aspect of CGL materials and structures in different systems,we reviewed the scheme of lower driving voltage for tandem white OLEDs.Finally,we provided suggestions for improving the materials and structures of tandem white OLEDs.

关 键 词：叠层白光有机发光二极管 电荷产生层 有机发光单元 功能层结构 有机发光材料 

分 类 号：TN312.8[电子电信—物理电子学]