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对具有代表性的绿色磷光发光掺杂材料Ir(ppy)3[三(2-苯基吡啶)合铱]进行了改性,在其配位体处导入了含有较大空间位阻的芳香族置换基团;设计开发了具有空穴/电子传导部位的EL(有机电致发光)共聚物,并分别对改性后的磷光掺杂材料[如Ir(Bu-ppy)3(三丁基吡啶合铱配合物)、Ir(Cz-ppy)3(三咔唑吡啶合铱配合物)等]与导电高分子掺杂后制成的OLED(有机发光二极管)的性能进行了分析。研究结果表明:上述芳香族置换基团能减轻浓度消光效应,提高原有掺杂材料的发光效率,并且提高了含该掺杂体的高分子材料在有机溶剂中的溶解性;含Bu-ppy配位结构的磷光掺杂材料比含Cz-ppy配位结构的掺杂材料具有更高的器件效率。
A representative green phosphorescent dopant, Ir (ppy) 3 [tris (2-phenylpyridinium) iridium], was modified to incorporate a sterically hindered aromatics at its ligand (EL (organic electroluminescence) copolymer with holes / electron conduction sites was designed and synthesized. The modified phosphorescent dopant materials [such as Ir (Bu-ppy) 3 (Iridium complex), Ir (Cz-ppy) 3 (triscarbazolylpyridinium iridium complex) and so on] and OLEDs doped with conductive polymers were analyzed. The results show that the above aromatic substitution groups can reduce the concentration extinction effect, improve the luminous efficiency of the original doped materials, and improve the solubility of the polymer material containing the doped body in organic solvents. The aromatic substitution groups containing Bu-ppy The phosphorescent dopant with coordination structure has higher device efficiency than the dopant with Cz-ppy coordination structure.