双极性树枝状蓝光PhOLED用Ir（Ⅲ）金属配合物的合成与性能研究

项目名称： 双极性树枝状蓝光PhOLED用Ir（Ⅲ）金属配合物的合成与性能研究

项目编号： No.61205179

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 信息四处

项目作者： 许慧侠

作者单位： 太原理工大学

项目金额： 25万元

中文摘要： 本项目从平衡蓝光PhOLED的载流子传输、提高蓝光PhOLED效率、寿命为目标，设计并合成双极性树枝结构蓝色磷光Ir(Ⅲ)金属配合物。以三线态能级较高fac-Ir(pmb)3或fac-Ir(ppz)3为"发光中心"，保证蓝光的色纯度；以双极性的P=O-Cz衍生物为"树枝单元"，改善PhOLED的载流子传输平衡性，提高其效率；引入表面功能团改善发光材料的溶解性，实现器件的全"湿法"加工；构建具有稳定空间立体结构的蓝光PhOLED用发光材料。通过优化设计，合成并提纯上述材料，确定其分子结构，表征其光物理与光化学性能，将其作为主体发光材料制作蓝光PhOLED，研究器件的载流子传输特性；结合实验和理论模拟计算结果，深入地研究该类材料的空间结构、分子间相互作用以及各功能团间的能量传递过程，从深层次上揭示该类蓝色磷光发光材料的发光机理。

中文关键词： 蓝色磷光有机电致发光；多氮唑；双极性；自主体；

英文摘要： Phosphorescent organic light-emitting devices (PhOLED) based on luminescent heavy metal complexes, particularly iridium(Ⅲ), are playing a key role in next generation flat panel displays and solid-state lighting. To improve carrier-transporting balance, consequently to achieve the excellent PhOLEDs with high luminescence efficience and desired lifetime, blue ambipolar and solution-processable phosphorescent light-emitting dendrimers will be synthesized in this work, which consist of light-emitting cores, dendrons (branches), and surface groups. Several important design features will be considered: firstly, the high-triplet-energy fac-Ir(pmb)3 and fac-Ir(ppz)3 were employed to act as deep blue light-emitting cores; secondly, the dendrons are composed of tetrasubstituted phenyl rings and ambipolar P=O-Cz (Cz: carbazole) derivatives. The precise control over the intercore distances means that the emissive cores can be photophysically independent thus avoiding interactions that lead to the quenching of the luminescence. Therefore,this will made it possible to use dendrimers with electron and hole transport abilities as light-emitting layer to improve carrier-transport propertier in PhOLED, avoiding the need for a host. Thirdly, the surface groups of suitable alkyl or alkoxy chains ensure solubility and that good-qual

英文关键词： Blue PhOLED；Multi-nitrogen heterocyclic；Ambipolar；Free-host OLED；