项目名称: 利用金属/介质多层电极制备高效透明白光有机电致发光器件的研究
项目编号: No.61306054
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 无线电电子学、电信技术
项目作者: 马健
作者单位: 中国科学院长春光学精密机械与物理研究所
项目金额: 32万元
中文摘要: 高效透明白光有机发光器件(TWOLED)对于照明及高分辨、高信息含量的有源显示等具有巨大的优势。无论用于显示还是照明,对于透明器件,其中非常重要的两个参数为器件两侧性能的一致性及效率滚降。为了达到器件两侧性能的一致,需要使得器件具有对称的电极结构。另外,磷光OLED具有较高的效率,但是磷光材料的引入导致器件的效率滚降较高,这是由于磷光材料激子寿命较长使得三线态-三线态淬灭(TTA)及三线态-极化子淬灭(TPA)的几率很高。因而,设计合理电极及器件结构,调控器件中光的传输过程及激子寿命,实现器件两侧性能对称及降低效率滚降是TWOLED实用化之前必须解决的关键科学问题。本项目提出利用金属/介质/…多层电极来构筑多模微腔结构器件,探索不同材料及电极结构等对器件微腔效应的影响,深入研究多模微腔结构的器件中光学传输及激子动力学过程的物理机理。最终制备两侧性能对称的、低效率滚降的、高效TWOLED。
中文关键词: 有机电致发光;微腔;白光;寿命;多层电极
英文摘要: Transparent white organic light-emitting devices (TWOLEDs) have much more advantages than the bottom-emitting one in solid state lighting and flat-panel displays,especially for high-resolution active matrix displays. The difference in luminance, efficiency and chromaticity coordinates for the emission from both sides was hardly avoided in TWOLEDs owing to an asymmetric structure of light propagation. In addition, the phosphorescent TOLEDs suffer from a dramatically decrease in EL efficiency at high current density, a behavior referred to as efficiency roll-off, which is a very important parameter for both lighting and display and predominantly ascribed to the triplet-triplet annihilation (TTA) and triplet-polaron annihilation (TPA) due to the long radiative lifetime of the triplet excitons and limited the application of the phosphorescent TOLEDs. In our proposal, we will fabricate TOLEDs with symmetrical electrode structure, i.e., multimode microcavity TOLEDs utilizing the metal/dielectric/… multilayer electrodes. We will investigate the effect of the electrodes with different metal and dielectric materials and structure on the microcavity effect and the mechanism of the microcavity effect adjusting the lifetime of exiton and optical transporting process.Finally,we will design the optimized structure for the TOL
英文关键词: OLED;microcavity;white-light;lifetime;multilayer electrode