在有机发光二极管中用作电致磷光材料时，离子型小分子有机铱配合物具有性质稳定，发光效率高，容易合成和提纯、产率高等优点。但它们又是一类特殊的无机盐，目前存在难溶于普通有机溶剂，与主体材料难以共混，容易发生相分离等缺点而很少用于有机发光二极管，多用于效率和亮度相对较低的发光电化学池。本项目拟将离子型小分子有机铱配合物作为磷光材料掺杂到聚合物主体材料中应用于聚合物发光二极管，拟通过在离子型铱配合物有机配体上引入长链状、树枝状烷基或烷氧基来提高溶解性和共混性，同时引入载流子传输功能基团、高效发光基团等对有机配体进行修饰，以开发出可适用于聚合物发光二极管的高效率、高亮度和高稳定性的新型离子型小分子有机铱配合物。

Being used as electrophosphorescent materials in organic light-emitting diodes (OLEDs), ionic small molecule organic iridium complexes offer some advantages such as high stability, high efficiency, being easily synthesized and purified with high yield, however, they are commonly insoluble in ordinary organic solvents, easy to be crystallized and immiscible with host materials leading to phase segregation because of being special inorganic salts. Instead of being used in OLEDs, they are usually used in light-emitting electrochemical cells (LECs) with low efficiency and brightness due to above mentioned issues. In this project, for being used as highly efficient and bright phosphorescent dopants in polymer light-emitting diodes with high stability, new ionic small molecule organic iridium complexes would be designed and synthesized via the organic ligands being modified by chainlike and dendritic alkyls or alkoxyls for improving solubility and miscibility, at the same time, carrier-transporting functional groups and good performance illuminophores also being contained in the ligands.