以三苯胺化合物为给体形成激基复合物的三重态动力学和能量转移

项目名称： 以三苯胺化合物为给体形成激基复合物的三重态动力学和能量转移

项目编号： No.11504109

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 吕昭月

作者单位： 华东理工大学

项目金额： 24万元

中文摘要： 最近，利用激基复合物三重态能量实现高效有机发光二极管(OLED)受到了研究人员的广泛关注，此类OLED仍有尚待解决的基础科学问题，如：激基复合物及其给体材料的三重态动力学，它关乎高效获取三重态能量的实现、能量转移的物理本质以及效率衰减问题的改善。本项目以三苯胺化合物为基础，首先结合稳态、瞬态光谱分析手段和载流子迁移特性研究①三苯胺化合物及其激基复合物的三重态动力学，②三苯胺化合物的三重态动力学与激基复合物中延迟荧光物理过程之间的作用规律；其次以三苯胺化合物形成的激基复合物为主体，分析主体和发光客体的光谱性能及器件的光电性能，明确主客体之间的能量传递机制及其对器件效率和稳定性的影响规律，为设计高效稳定的OLED提供理论指导。

中文关键词： 三重态；延迟荧光；激基复合物；能量传递；效率衰减

英文摘要： Very recently, triplet harvesting of exciplexes to fulfill high-efficiency organic light-emitting diodes (OLEDs) has been attracted much attention. In this type of OLED, there still remain some unsolved fundamental issues, such as the triplet dynamics of exciplexes and their donors, which is of great importance for efficient harvesting of triplet states, understanding of energy transfer mechanism as well as improving efficiency roll-off of devices. Based on the triphenylamine compounds, this proposal will focus on the research of following aspects: the triplet dynamics of exciplexes and their donors by measuring steady-state and transient spectra as well carrier mobility; the relationship between triplet behaviors of triphenylamine compounds and delayed fluorescence of exciplexes. In addition, the exciplex-forming host to guest energy transfer mechanism can be understood with the help of the spectral characteristics of hosts and guests as well as optoelectrical properties of devices. The influence of energy transfer mechanism on the efficiency roll-off can be illustrated, which will be a theoretical guidance for designing high-efficiency and long-lifetime OLEDs.

英文关键词： triplet;delayed fluorescence;exciplex;energy transfer;efficiency roll-off