局域磁场增强OLED发光效率的研究

项目名称： 局域磁场增强OLED发光效率的研究

项目编号： No.61307039

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： 张嗣杰

作者单位： 四川大学

项目金额： 25万元

中文摘要： 本研究课题提出采用特殊设计的金属/有机发光介质纳米结构激发表面等离子体（SPP）场诱导形成基于SPP局域增强效应的稳恒磁场，利用该磁场增强单/三激发态之间的系间跨越，实现OLED中单/三激发态的激子分配比例的调控，从而提升OLED发光效率的新思想和新理论。通过理论、模拟和实验研究，揭示SPP场增强效应对OLED中单/三激发态激子比例分配的影响规律，厘清OLED中SPP场与其发光特性之间的关系，探索通过特殊设计二维或三维金属/有机介质纳米复合结构提高OLED发光效率的物理机制和实现途径，建立基于SPP场增强调控技术的高效OLED的结构设计理论和方法。为新型高效OLED器件设计理论及其发光特性的研究提供一种新思路和新途径，对促进有机发光材料与器件发展，推动绿色照明技术应用有重要意义。

中文关键词： 表面等离子体；局域增强效应；系间跨越；异质结界面；有机自旋电子

英文摘要： This project proposed here aims to enhance the efficiency of an organic light emitting diode (OLED) by utilizing metal nanostructures to generate surface Plasmon polaritons (SPP) which have shown the possibility of generating high local magnetic fields. The efficiency of an OLED depends on the singlet/triplet ratio, whch is normally fixed at 1/3. This work will introduce a high local magnetic field, produced by the SPP, to enhance the intersystem crossing(ISC) between the singlet and triplet spin states to tune the ratio of singlets to triplets in the OLED, hence enhancing its efficiency. Combing theoretical and experimental research, this work will allow us to understand the SPP as a means to control spin interactions in an electrically operated device. In addition, this work will further clarify the relationship between the high local magnetic fields produced by the SPP and luminance characteristics of an OLED. Furthermore, this work will explore a physical mechanism and an efficient method to specially design a 2D/3D metal-organic nanostructure for improving the efficiency of an OLED. Finally, this work will propose a theory and method for a high efficient OLED by using the local magnetic fields produced by the SPP to influence the ratio of singlet/triplet in the OLED. This is an exciting and unique possibil

英文关键词： SPP；Localised enhancement effect；Intersystem crossing；Hetero-junction interface；Spintronics