基于中性层技术提升柔性OLED弯曲可靠性研究进展  

Research Progress on Improving Bending Reliability of Flexible OLED Based on Neutral Layer Technology

作　　者：吴马佳奇 张驰 王伟高 杨连乔[1] 张建华[1] 魏斌[1] WU Majiaqi;ZHANG Chi;WANG Weigao;YANG Lianqiao;ZHANG Jianhua;WEI Bin(Key Laboratory of Advanced Display and System Applications,Ministry of Education,Shanghai University,Shanghai 200072,China;School of Microelectronics,Shanghai University,Shanghai 200444,China;School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学新型显示技术及应用集成教育部重点实验室,上海200072 [2]上海大学微电子学院,上海200444 [3]上海大学材料科学与工程学院,上海200444

出　　处：《发光学报》2023年第4期701-716,共16页Chinese Journal of Luminescence

基　　金：国家重点研发计划(2020YFB2008500);上海市科学技术委员会(19142203600)。

摘　　要：有机发光二极管(OLED)由于具有结构简单、发光效率高、制造工艺简单和厚度超薄的特点,结合柔性基底可以制备具有弯曲和折叠功能的柔性OLED器件,在柔性显示、柔性照明等领域发挥了重要作用。在承受以弯曲为主的外加载荷时,柔性OLED器件中的无机薄膜很容易出现裂纹、脱层和屈曲等形式的失效,这些失效会使器件的导电性下降并破坏器件原有的结构,从而影响器件的效率与可靠性。中性层的使用能够有效减小器件关键部位的应变,从而减轻或消除失效,器件在弯曲状态下的可靠性也得以提高。近年来,一系列基于柔性OLED器件中性层的研究被陆续报道。本文综述了中性层技术在柔性OLED器件上的应用。首先,讨论了中性层的概念以及单个中性层位置的确定方法;其次,介绍了单个中性层和多个中性层在实际器件中的应用;最后,对柔性OLED器件未来的发展方向做出了展望。Due to the simple structure,high light-emitting efficiency,simple manufacturing process and ultra-thin thickness characteristics for organic light-emitting diode(OLED),flexible OLED devices with bending and folding capabilities can be fabricated by combining flexible substrates.These devices play an important role in flexible display,flexible lighting and other fields.When subjected to external load mainly bending,the inorganic thin films in the flexible OLED devices are prone to failure in the form of cracks,delamination and buckling.These failures reduce the conductivity and destroy the original structure of the devices,thereby affecting their efficiency and reliability.The use of the neutral layer can effectively reduce the strain in the key parts of the devices,thereby reducing or eliminating failure,and the reliability of the devices in the bending state can also be improved.In recent years,a series of studies based on neutral layers of flexible OLED devices have been reported successively.This paper reviews the application of neutral layer technology in flexible OLED devices.Firstly,the concept of neutral layer and the method of determining the single neutral layer􀆳s position are discussed.Then,the application of single neutral layer and multiple neutral layers in practical devices is introduced.Finally,we give an outlook on the future development direction of flexible OLED devices.

关 键 词：柔性OLED器件 中性层 弯曲半径 黏附层 

分 类 号：TN383.1[电子电信—物理电子学]